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HomeMy WebLinkAbout4. Joint Meeting with Park and Recreation Advisory Board ~r CITY OF SHAKOPEE MEMORANDUM To: Mayor and City Council Mark McNeill, City Administrator Shakopee Parks and Recreation Advisory Board From: Jamie Polley, Parks, Recreation & Natural Resources Director Meeting Date: January 29, 2008 Subject: Community Center Discussion Work Session INTRODUCTION The City Council and the Parks and Recreation Advisory Board will discuss the physical repairs/improvements needed and the future of the community center. Council will be further asked to give direction based on the PRAB recommendations. BACKGROUND There are two issues to discuss with the Council: 1. What physical repairs /improvements are needed to be done to the Community Center Building? The Community Center currently has a water infiltration problem that needs to be repaired. What is the total damage from the water infiltration, and as the repairs are made are there other needs for the Community Center that should be addressed? Late in 2004 City Council authorized a feasibility study to determine program identification, market analysis, and provide cost estimates and concept drawings. The feasibility study included an evaluation of the conditions of the community center Attachment A. Correction of the current conditions was included in the proposed expansion. The proposed expansion of the community center went to referendum on May 24th, 2005 and unfortunately failed. Since the referendum failed and the community center was not expanded the water infiltration was also not corrected. Staff met on January 10, 2008 to discuss the water infiltration problem, programming space and future programming. Staff prioritized the needs of the community center based on their thoughts and programming needs. Staff's recommendations were then presented to the PRAB at a work session on January 16, 2008. The PRAB discussed the community center at length and has prepared a number of recommendations for the Council. The PRAB developed short term and long term actions. The short term actions and the items they felt were of first priority includes repairing the water infiltration problem and upgrading the current facility. Fixing the water problem could include repairing or replacing sheet rock, the gym floor, walls, lockers, and carpeting. In addition, a number of areas will be disturbed and therefore need replacement such as the front entrance area and landscaping. During the replacement of the disturbed areas the City should consider improving the aesthetics of the building. An evaluation of the roof and water runoff may also be needed. Upgrading the facility includes making changes to the facility that would make the community center more energy efficient, user friendly, and more productive. An energy audit was recently conducted on the community center and the ice arena Attachment B. Lighting replacement and adjusting mechanical system maintenance/usage were suggested. Additional upgrades include reconfiguring the front desk and office space. 2. Given the current usage, failed referenda, competition from other public and private providers of recreation and fitness, what should the future of the Community Center be for the City of Shakopee? In 2004 the City Council created a citizen task force to evaluate the options for the community center. These options included closing the community center, privatizing, expanding through a partnership, expanding through public financing, or doing nothing. The citizen task force recommended expanding through public financing. Attachment C illustrates the pros and cons of each option and how the citizen task force reached their recommendation. Council is asked to evaluate the importance and the need for the City of Shakopee to have a community center. Like Shakopee many of the surrounding communities provide a community center for their residents. Shakopee continues to expand and recreation is an important component to growth within the area. In addition, the community center incorporates 3 of the 5 goals of the City of Shakopee Vision. The goals include active and healthy communities, high quality of life, and great place for kids to grow up. If the City Council deems the community center an important part of the community, we will want the center to continue to offer high quality programs, services and facilities. In addition new and innovative programs will need to be offered to keep the community center in line with surrounding communities and following the current park and recreation trends. To stay competitive and desirable to the community, long term changes will need to be considered. Structural Issue Needs: The long term structural needs to be considered include facility enhancements such as adding more windows around the walking track, replacing the lift or adding a service elevator, and adding a security gate or wall to designate an entrance for the teen center. Larger more costly enhancements include adding a second floor to the fitness center which could include a dance studio, meeting space, amulti-purpose room, adding a multi purpose facility that would include a second sheet of ice. The second sheet would be turF in the spring & summer for additional programming and provide a meeting space and a training facility, and constructing a senior center with an industrial kitchen. Other additions include providing a child care area and/or indoor play area and adding an indoor pool. BUDGET Staff requested $150,000 to be approved in the 2008 CIP. This amount has not yet been allocated specifically to the community center. If the amount needed to correct and upgrade the community center exceeds $150,000 the additional funds would be allocated from the CIP fund. At this time the CIP has a balance of approximately $1.2 million. RELATIONSHIP TO GOALS Active and healthy communities - A High quality of life - 6 Great place for kids to grow up - C TWO YEAR GOALS AND ACTION PLANS Goal 8 -Prioritize Projects & Best Utilize the Current Staff & Resources. REQUESTED ACTION The City Council is asked to: 1. Direct staff to move forward on PRAB's recommendation to fix the water infiltration and develop and RFP to assess the water. 2. Approve staff to begin a preliminary design to reconfigure the front desk and Parks and Recreation office area. 3. Direct staff to develop a plan to upgrade the current facility to be more cost efficient based on the most recent energy audit. 4. Direct staff to develop a task force to evaluate the additions to the community center and provide a plan to the City Council. 5. Discuss the future of the community center. t't ~}~.chrnex~+ ~ ! i _ _ _ 1 t SHAKOPEE COMMUNITY CENTER CONDITION EVALUATION SHAKOPEE,,MINNESOTA March 2005 Shakopee Recreation Center Expansion Community Recreation Center Benchmarks: Based on market research conducted by Ballard*King and Associates at community recreation centers ,across the United States, the following represents the basic benchmarks. • The majority of community recreation centers that are being built today are between 65,000 and 75,000 square feet. Most centers include three primary components A) A pool area usually with competitive and leisure amenities, B) Multipurpose gymnasium space, and C) Weight/cardiovascular equipment area. In addition, most centers also have group exercise rooms, drop-in childcare, and classroom and/or community spaces. • For most centers to have an opportunity to cover operating expenses with revenues, they must have a service population of at least 50,000 and an aggressive fee structure that reflect market driven conditions and fees. • Most centers that are between 65,000 and 75,000 square feet have an annual operating budget of between $1,750,000 and $2,500,000 annually. Nearly 65% of the operating costs are from personnel services, followed by approximately 20% for contractual services, 13% for commodities, and 2% for capital replacement. • For centers that serve a more urban population and have a market driven fee structure, they should be able to recover 70% to 100% of operating expenses. For centers in more rural areas the recovery rate is generally 50% to 75%. Facilities that can consistently cover all of their operating expenses with revenues are rare. The first true benchmark year of operation does not occur until the third or forth full year of operation. • The majority of centers of the size noted above (and in an urban environment) have an average daily paid attendance of 800 to as much as 1,000 per day. These centers will also Typically sell between 800 and 1,500 annual passes (depending on the fee structure and marketing program). • It is common for most centers to have athree-tiered fee structure that offers daily, extended visit (usually punch cards) passes, and annual passes. In urban areas it is common to have resident and non-resident fees. Non-resident rates can run anywhere from 25% to 50% higher than the resident rate. Daily rates for residents average between $3.00 and $6.00 for adults, $3.00 and $4.00 for youth and the same for seniors. Annual rates for residents average between $200 and $300 for adults, and $104 and $200 for youth and seniors. Family annual passes tend to be heavily discounted and run between $350 and $800. • Most centers are open an average of 100 hours a week, with weekday hours being 6:OOam to 10:00pm, Saturdays 8:OOam to 8:OOpm and Sundays from noon to 8:OOpm. Often hours are shorter during the summer months. Note: These statistics vary by regions of the country. December 20 2004 30 Barker Rinker Seacat Architecture Bonestroo Sports Ballard*King and Associates is is ~I I ~I, ii i' ,I, EXECUTIVE SUMMARY The Shakopee Community Center was inspected by a team of engineers and architects from Bonestroo Sports to review and evaluate known deficiencies in the facility that warrant repair or replacement as part of the proposed Community Center Expansion Project. The inspection included Community .Center staff that was familiar with the ongoing operational problems and maintenance/repair history of the facility. This staff involvement proved quite valuable and was the basis for determining the deficiency list for the facility. j~. The deficiencies of the building can be categorized in the following general categories: 1) subsurface moisture; 2) lighting; and 3) operational efficiency. The most serious deficiency of the facility relates to the subsurface moisture problems that occur during the spring runoff and periods of heavy rain. The Shakopee Community Center has experienced a history of moisture related operational issues due to the design and detailing of the northerly wall. sections of the facility. Contributing additionally is the lack of an established system to drain the subsoils under the lower level floors. kin lot areas Burin si nificant rainfall events created he roof and adjacent ar t The run off from g g g J p conditions where moisture is leaking under the floors and through the walls of the community ~i~ center. Some damage has occurred to the masonry walls and the wood flooring in the j~' gymnasium. Also, a serious problem with freezing and heaving of the excess ground water in the ice arena was resolved a few years ago by rerouting the transmission mains above grade to avoid the moisture. Damage from the excess moisture has been minimized to date due to quick ~ ; response by staff to control the excess moisture and therefore minimize damage. Due to the quickness that the water can infiltrate the facility after significant rains it should not be assumed that staff will always be able to control damage, in fact, some hidden and potentially serious damage could already exist in the masonry walls in the lower level along the north wall behind the lockers. Lighting issues are primarily related to low lighting levels provided to some areas as part of the g original design. The metal halite lamps used in sports lighting in the facility have significant 9~ reduction in their lighting intensities over time and therefore the lighting deficiencies in some of the problem areas was probably not noticed at the time of project completion when the lamps ; were new. Lighting level standards for all types of activities are published by the IES, the accepted standard in the industry, and it is those standards that were used in establishing the adequacy of the lighting in all spaces. The operational efficiencies of the facility were primarily limited to energy consumption I concerns and access issues. The existing ice arena does not have aloes-emissivity ceiling which if installed would dramatically reduce the radiant heat from the sun on the roof and both reduce energy load on the ice system as well as keep a warmer dryer environment adjacent the steel roof structure to minimize the potential for corrosion. Access to the roof currently consists of temporary interior and ext rior ladders through a hatch, which makes this operation more difficult and unsafe than co~only provided means. This issue can best be addressed in the proposed expansion of new building spaces by installing permanent stair and ladder accesses. ~i I Shakopee Community Center Condition Evaluation Page 1 ~ 1 i i f We proposed the following recommendations that should be implemented with any expansion project that will help improve the conditions in the facility: Description of Recommendation Cost of Implementation 1-Add drainage the system along the The estimated cost of modification is northerly side of the building to intercept the $55,000 groundwater moisture. This system would include repair of the northerly masonry walls, new waterproofing and foundation insulation. 2 -Provide additional free draining subsoil The estimated cost of this recommendation and drain the under new expansion areas to is $100,000. enhance subsoil drainage under existing lower level floor slabs. 3 -Provide new 50 footcandle lighting The estimated cost of this recommendation system in gymnasium and running track. is $10,000. 4 - Install a low emissivity ceiling in the The estimated cost of this recommendation existing ice arena. This will reduce moisture is $60,000. condensation in the arena and reduce the energy and maintenance costs of the facility. 5 -The substandard lighting in the existing Costs to address these issues are included gymnastics and fitness gym will not require in new expansion areas proposed for upgrading for it is being relocated to a new project. space in the proposed expansion plan. Another recommended improvementthat will be addressed in the new expansion plan will be to improve access to the roofs. Other recommendations include: • Improve access to the roof to encourage safe maintenance inspections and repairs of the rooftop systems. This can be accomplished most effectively in the proposed expansion' project. • If a second ice sheet is constructed as proposed in the conceptual plan for the facility expansion provisions should be made for creating a centralized refrigeration plant for both ice sheets that will increase operational efficiency. Shakopee Community Center Condition Evaluation Page 2 ~ r. I i i • The relocation of the gymnastics and fitness areas as proposed in the expansion plan would eliminate the need to upgrade the lighting systems in these areas as outlined in the , condition report. i. i. I• ~I i 3 I~ l ~I ~ f it I~ i F: ~ ` k=: II Shakopee Community Center Condition Evaluation Page 3 I 7; BUILDING CONDITION INSPECTION OBSERVATIONS 1) Most of the North basement wall of the facility is vulnerable to moisture problems. a. Worst areas are the Men's Locker Room, Easterly Stairwell, Center Stairwell, and the Mechanical Room. b. Original design of the building was supposedly precast which City was told wouldn't have had the susceptibility to moisture problems as the concrete block design actually installed. This may be somewhat true but without good drainage and drainage system by this wall most wall construction types would suffer from some problems. c. It appears very little drainage the and waterproofing was installed on the north wall and under the lower level floors. d. Some testing of the possible sources of the water has been done. i. See reports by GME Consulting, Inc. (7/30/96) and Allied Drilling Company (1/23/03) previously executed for the City. ii. Soil borings from the reports above indicate that native soils and site backfill is generally not very pervious with the exception to the granular backfill used under the floor slabs and immediately adjacent the building. iii. No water table conditions were found in the soils testing that could potentially explain the moisture problems that have been experienced.. e. Some of the concrete blocks are deteriorating behind the lockers in the Men's locker room. Of particular concern is the mortar joints and structural reinforcement in the cores of the masonry block. Can have as much as 1" of water standing on the floor after heavy rains or rapid spring thaws. f. Water infiltration in the northeast corner has caused sheetrock damage, mold and carpet damage. g. Water infiltration in the ice arena area has occurred at times and this usually results in water collecting in the bleachers. We also think that possibly some water is migrating under the ice sheet and could be causing some minor heaving of the ice floor which could be going undetected at this time. We feel that the ice floor should be surveyed immediately after the ice has been removed for the year to determine any irregularities in the floor elevation. h. Some work has been done in the planting beds to minimize water on the north side by raising grade and adding plastic in the planting beds. 2) Water works its way under the gym floor and has caused some damage to the wood during times of heavy rain and spring melting a. Some of the flooring has been slightly damaged from cupping and lose joints. b. Currently the City has equipment to dry out the wood floor if it gets wet c. Basketball floor has gotten wet the past two years. d. Some regrading and retaining wall construction was done on the east end of the building that has helped Shakopee Community Center Condition Evaluation Page 4 3) Water has caused problems on the south side of the ice rink where a high water table was observed in the area of the refrigeration headers. Due to problems with freezing and the resultant heaving the headers have been relocated to above grade from their previous below grade location. ',j 4) Lighting is poor in the basketball gyms and over the running track. Readings were taken , to documented the lighting levels. a. Gymnasium i. Initial condition: 1. The total~number of fixture in half the gymnasium is fifteen (15). 2. The curtain was closed. 3. No Hi/Low level switching. 'fl 4. Lamp life was estimated to be three years old. 5. 400W metal halide lamp with lens. I,I ii. Illuminating Engineering Society of North America (IESNA) ~ I recommendations: Classes of Pla and Facilities Facility Class II III IV International X National X Professional X ~ ~ Colle e X X Semi- rofessional X X Sorts clubs X X X 'I Amateur lea ues X X X Hi h schools X X X Trainin facilities X X Elementary schools X Recreational i' events X Social events X ~i Sort-li htin Illumination Recommendations Class of Horizontal S ort Pla FC Max:Min Basketball I 125 1.7:1 80 2.5:1 III 50 3:1 IV 30 4:1 Volleyball II 70 2.5:1 III 50 3:1 ~I IV 30 4:1 Shakopee Community Center Condition Evaluation Page 5 ~ I - - - _ - - k iii. Measured Values: 1. Middle of four fixtures: 16.4 FC 2. Middle of two fixtures: 20.5 ~FC 3. Below one fixture: 22.5 FC ' 4. Estimated average: 20 FC 5. Estimated Max:Min 1.4:1 6. A problem area occurred with the addition of the running track. The footcandle level under the track was measured at 2.7 FC, and makes the gymnasium look darker. 7. The running track did not have any lighting over the track. The general lighting was located to far from the track to provide for any substantial lighting on the track. 5) Lighting in Fitness room is also poor with part of the problem being the black flooring and darker walls. Gymnastics area seems a lot brighter even though the only difference is the lighter colored floor. Took light readings in these rooms. a. Exercise room/Gymnasticsrnom i. Initial condition: 1. The total number of fixture in half the Exercise/Gymnastics zoom is four (4). 2. The curtain was closed. 3. No Hi/Low level switching. 4. Lamp life was estimated to be three years old. 5. 400W metal halide lamp with lens. ii. Illuminating Engineering Society of North America (IESNA) recommendations: S ort-li htin Illumination Recommendations Class of Horizontal S ort Pla FC Max:Min Gymnastics II 80 2.5:1 III 50 3:1 IV 30 4:1 Exercise Room 30 iii. Measured Values: 1. Middle of four fixtures: 12 FC 2. Middle of two fixtures: 15 FC 3. Below one fixture: 22.5 FC 4. Estimated average: 16.5 FC 5. Estimated Max:Min 1.9:1 6. The exercise room has a black pad over the wood floor to protect it from the weights. This black flooring gives the appearance of a very dark exercise room. Shakopee Community Centex Condition Evaluation Page 6 6) Sometimes gets humid in the building in the summer months. 7) Large hot water boiler for domestic heat....look at efficiency in the summer months. 8) Water softeners were installed a few years ago to help with problems from the calcium hardness. , 9) Cooling towers for ice system were replaced when they were about 6 years old because of calcium hardness damage. 10) All four compressors were replaced within the first 6 years of operation. 11) No easy roof access can be found in the building. 12) Snowmelt system now works after replacement of the desuperheater. 13) The Olympia is 9 years old and operates on propane fuel. 14) There are water heaters dedicated just to the ice resurfacer hot water. 15) Typical brine return temperature for the ice is 17-18 deg. F. which seems to provide consistent ice quality. 16) They have some leakage in the Ice Arena roof. 17) There is a leak from a pipe located over the scorer's arena on the south side of the rink. 18) They have a desiccant dehumidification system that broke down this past summer due to some mechanical problems. 19)Normally keep the ice rink air temperature at about 45 deg. F but try to get the arena air up to 60 deg. F for games but this takes a lot of time and energy to create. 20) Lighting system in the ice arena is not very good or efficient. a. Ice Arena i. Initial condition: 1. The total number of fixture in the Ice Arena is sixty (60). 2. There are additional fixtures over the stands and team benches. 3. No Hi/Low level switching. 4. Lamp life was estimated to be three years old. 5. 400W metal halide lamp with no lens. Shakopee Community Center Condition Evaluation Page 7 ii. Illuminating Engineering Society of North America (IESNA) recommendations: S ort-li htin Illumination Recommendations Class of Horizontal S ort Pla FC Max:Min Ice Hockey I 200 1.7:1 and Figure II 150 2.5:1 Skating III 100 3:1 IV 50 4:1 iii. Measured Values: 1. Middle of four fixtures: 52 FC 2. Middle of two fixtures: 66 FC 3. Below one fixture: 63 FC 4. Estimated average: 57 FC 5. Estimated Max:Min 1.2:1 RECOMMENDATIONS The following recommendations are presented based on the walk through inspection, discussion with staff and further analysis of technical information found in reports, plans, specifications and appropriate standards in the industry. 1) The moisture problems in the north wall and lower level floors should be repaired as part of any proposed building expansion. If an expansion project is not initiated at this time, strong consideration to providing a more permanent repair of the moisture problem as outlined in this report is recommended. While repairs to date have been attempted they have all been low cost efforts to minimize the problem. Continued moisture and hydrostatic forces against the north.;basement wall will cause structural degradation of the wall and over time a more serious exposure to significant damage. Recommended repair of the north wall considers two different but related solutions as outlined on Details A and B of this report. The details relate to the two fundamental conditions that exist on the north wall which include the slab on grade bleachers in the area of the ice arena and the basement condition in the remaining areas of the wall. The repair includes significant excavation along the wall to enable the installation of drain the and layers of impervious (clay) soil to prevent surface and subsurface water from building up against the wall and ultimately under the lower level floor slabs. The drain the would carry all the subsurface water by gravity to the storm water pond at the southwest corner of the site. The structural integrity of the wall would be established by core filling all empty cores of the masonry wall with grout through holes created in the outside faces of the masonry below the exterior ground grade. Any interior exposed mortar joints in the masonry would be tuck-pointed and repainted as required. Any interior finishes with mold or mildew damage would be replaced. Shakopee Community Center Condition Evaluation Page 8 r i '.i . 2) The moisture problems beneath the lower level floor are primarily related to large ' quantities of water infiltrating into the soils along the north wall. Elimination of water infiltration along the north wall through the recommended repairs outlined above will ,I ' eliminate most of the water issues below the lower floors but additional measures will be ~ ; implemented to further prevent potential problems from developing. As part of the proposed conceptual expansion plan further subsurface drainage measures should be considered. We recommend that proposed lower level expansion areas adjacent the existing lower level spaces be over excavated to provide for the installation of free i, draining subsoils and subsoil drainage piping to assure that water cannot pond beneath the floor slabs. By over excavating to an elevation lower than the existing floor slab ~ granular subsoils a means of laterally evacuating any excess water in under the existing ~ ! ~ floor slabs can be established as outlined in Detail C of this report. Drainage piping under ' I the floor would be discharged by gravity to the storm water pond in the southwest corner ~ j of the site. ~ ~ i 3) If a second sheet of ice is constructed as proposed on the expansion plan we recommend ' i' that the new refrigeration plant for this ice sheet be designed to ultimately provide j'' refrigeration to both the existing and new ice sheets. It would not be necessary to provide 1`, immediate capacity for both ice sheets rather size critical components to allow for future ~ economical expansion of.the ice plant. Ultimately operating both ice sheets on one plant ! I, will save approximately 15-20 percent of the energy costs over operating two separate systems. Repairs made on the existing ice plant currently have the system operating well and it is recommended that it be kept in operation as long as it operates efficiently and reasonably trouble free. Consideration should be given to potentially installing the transmission mains for the existing rink under the perimeter floor slab of the new rink to ~ allow for simple conversion to the new ice plant.in the future. ~''i is 4) Replace fixtures with new more efficient fixture, and provide a quantity of light as recommended by the IE IES for a type III class of play at 50 FC. 5) Provide lighting on the underside of the running track, and above the running track. j 6) Replace fixtures with new more efficient fixture, and provide a quantity of light as recommended by the IES for a type III class of play at 50 FC for both the gymnastics and the Exercise Room. 7) Replace the rubber flooring in the Exercise room to improve the lighting. li 8) Provide task lighting at treadmills for reading. II 9) The ice arena is currently at the quantity of light as recommended by the IES for a type ~ IV class of play at 50 FC. BRA recommends not changing the existing ice arena lighting ~ as part of this project, but considering changing it in the future. 10) Provide lighting at the new Ice Arena as recommended by the IES for a type III class of j play at 100 FC. Shakopee Community Center Condition Evaluation Page 9 , r 11) Installing a stair and roof hatch in the appropriate areas of the proposed expansion should provide improved access to the roof. It may be also necessary to install some permanent ladders or stair structures on the roof to achieve access to all the different roof levels , proposed for the new and existing structure. These improvements can best be determined during the final design of the proposed building expansion. Any remodeling and/or expansion project provides many opportunities to enhance or repair existing operational and functional problems in the building. Most often the level of improvement is limited to the available budget and prioritized by the severity of the deficiency. In this report, we have identified the most significant of the issues encountered and recommended improvements that we feel make sense to correct at this time. This is not to say that as the expansion project is further developed and budgets evaluated that other improvements should not be considered. If the City elects to move ahead with an expansion project then Community Center staff should continue to take the opportunity to present and discuss all problem areas that they become aware of during the final design process so improvement priorities can be evaluated to make the best facility the budget can afford. END Shakopee Community Center Condition Evaluation Page 10 r y. I S ~I ' ~I DETAIL DRAWINGS fi i 1 I '~x1sn+~t~ ~~s~v~~~ •'.r " ~ M ~CW ' ~?NV1.~irl~, dktKRtL 1NfsV~ ~ 6" O~t~nt T.E„~ • . - a h_ •.a4 i 1 DETAIL A ' Shakopee Community Center Condition Evaluation Page 11 i 1~+1 Wh1'CR~c+tvL~? t~,R~i~t QolylD t zvSvv+kt?au ti ~ 4 ~ ~ . . N~ ~ NtW iE~ ~t'RAu1J t _ DR~~N TALE. b~C~ctrL` ~~X+S`C+NLt NItW !.L,I~jY ' ¢1C4 5'C"~ IJ ~ bC~N VLJ~ ~?gC~t1C'ita... . DETAIL B Shakopee Community Center Condition Evaluation Page 12 r ~ I . ''I , ~ I I < j i. i i i i. N~v~ Exf~NS~Ot.7 ~ ~k~S'['tN(~ 13b~4,D?N(,~ i t UPPER LEVEL FLOOR ELEV.r i 8as.o - - _ LOLLER LEVEL FLt70R ELEV. ~ c.:•H _ _ 786.0------- f • ~ k~u?NU+. ~ST~~~Y,41't~N , u~~r~e.~~ e+tA~N~(~` lsQ FROM 6K~S1, b~I(3ctRr1DE Su1St~c^QTz GLEAN SY1gtJ Fitt IN OV6te6ex4gyJ~TlpIJ ut,,~ bl2Ataq~ ~YS7~M p'SGyAR(3~ 'i'O S7D~RM Rv--`~ ~ St~~&FLOO?e. poNa Cam- ~g~.a~ t~~A1 N ~ ~rE tM.PQcaJ~. M ~s n~ T.S DETAIL ~C Shakopee Community Center Condition Evaluation I Page 13 I ~ PHOTOS _r' ' • • ~ • r • ~ ~ ~ ~ ~ ~ ~ ~ 0,.. ~ . . ~ ~ Shakopee Community Center Condition Evaluation Page 14 r~-l-kachm~~ ~3,. Shakopee Community Center ~ Arena 1255 Fuller Street Shakopee, MN 55379 952/233-9522 Joshua Barrick -Arena Operations ibarrick(cr~,cishakopee.mn.us Dec 27, 2007 06-07 Gas Usage 49,220 Therms $50,695 Nov 06 -Oct 07 Electric Usage 1,307,400 KWHs $121,285 TOTAL $171,980 Arena (52%) Community Center (48%) 2007 Total Gas $18,757 (37%) $31,938 (63%) $50,695 Electric $71,558 (59%) $49,727 (41%) $121,285 TOTAL $90,315 $81,665 $171,980 PROJECTED SAVINGS PAYBACK 1. Boiler Operation $1,850 <1 yrs 2. Time Clocks $4,150 <1 yrs 3. Vending Miser $500 <2 yrs 4. Lighting Retrofit $8,400 2.5 yrs 5. Premium Motors & Adjustable Frequency Drives $1,300 <4 yrs 6. Test - n -Balance & Optimize Energy Management $4,750 5 yrs 7. High Efficiency Front-End Boiler(s) $7,450 5 yrs TOTAL SAVINGS = 17% $28,400 per year ~ asscci~~s, mrc. Energy Efficiency Cr~nsult~ing Services crud Solutions 2©4 W 7th Street PMB 20Z • Northfield, MN 55457.804/376-05i 7 • fax 5a1i663-7858 gaernst(a~q.com Natural Gas Natural gas retail prices fluctuate with the monthly New York Mercantile Exchange, NYMEX, contract prices. Increased demand combined with the decreased domestic supply (LTS, Canada & Mexico) have combined to create a highly volatile natural gas energy market. The markets have settled down the past two winters and the futures market for next winter is trading in the range of $1 per therm. Gas Therms Amount cost* December-07 7,933 $7,945 ~~.oo November-07 4,503 $4,032 ~o.sa October-07 2,303 $1,875 $o.7s September-07 1,876 $1,644 $o.s5 August-07 2,085 $1,999 $o.s3 July-07 2,188 $2,280 $1.oz June-07 2,720 $2,311 $o.s3 May-07 3,361 $3,433 $1.01 April-07 4,234 $4,620 $1.os March-07 5,107 $5,806 $1.13 February-07 6,677 $7,706 $1.15 January-07 6,233 $7,044 $1.1z Annual 49,220 $50,695 $1.oz 2007 Gas Usage (Therms) s,ooo - s,ooo 4,000 2,000 - - 0 Jan-07 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct 07 Nov-07 Dec-07 _ _ Electric Shakopee Public Utilities electrical rates were recently updated in January 2007. Monthly bills include Service Charge, Energy Charge, Demand Charge, Power Cost Adjustment, Conservation Charge and MN Sales Tam Service Charge $70 per Month Demand Charge $8.50 per KW Energy Charge $0.0553 per KWH $0.0.0493 per KWH (In excess of 400hours times the billing demand) MN Sales Tax 6.5% KILOWATT HOUR (KWH) ENERGY .CHARGES Energy usage is measured in kilowatt-hour, KWH. (10) 100-watt light bulbs would consume 1000 watts of energy per hour, 1 KWH DEMAND METERING & RATCHET PENALTY The Demand meter measures electricity usage (KWH) in 15-minute increments to calculate the Measured Demand. 100 KWH measured energy usage in 15 minutes is equivalent to 400 KWHs usage in one hour. Therefore the Measured Demand in that 15 minute increment of time is 400 KW. BILLED DEMAND & RATCHET PENALTY The billing demand shall be the customer's greatest 15 minute demand, in kilowatts incurred during the month for with the bill is rendered, but not less than 60% of the highest demand during the preceding 12 months. POWER FACTOR The customer agrees to maintain an average power factor at or above 90%. IF the power factor is less than 90%, the billing demand will be adjusted by multiplying the actual 15 minute demand measured during the month by the ratio of 90% to the measured power factor. (Customer has capacitor capacity to satisfy 90% Power Factor requirement. ND Penalty.) LOAD FACTOR Load factor is an analytical tool that measures the average KW demand versus the maximum KW demand. More than almost anything else, the average cost of electricity is determined by load factor. (How many days per month is the motel room full?) Motel room comparison: - Cumulative number of daily room occupancy each month? (KWH energy usage) - Quantity of motel rooms- available in the motel? (Monthly measured demand KW) - Days in the month? (Hours in billing period) Load Factor = KWH used in a billing period /(Measured demand KW * Hours in billing period) Load Elec KWH KW Factor Amount cost* December-07 117,600 229 70% $10,572 $o:oss November-07 106,800 314 47% $10,585 ~o.oss October-07 113,400 316 49% $11,181 $o.oss September-07 112,440 314 49% $10,725 $0.095 August-07 138,000 313 60% $13,209 $0.095 July-07 100,560 307 45% $10,007 $o.oss June-07 112,200 312 49°!° $10,608 $o.osa May-07 111,000 312 49% $10,106 $o.oso April-07 97,560 306 44% $9,320 $o.os5 March-07 101,160 220 63°I° $8,451 $o.oss February-07 84,720 232 50% $7,396 $ooas January-07 111,960 235 65% $9,125 $o.os1 Annual 1,307,400 3,410 $121,285 go.o9z 2007 Electric Usage (KVIIHs) 1st KWH ¦ 2nd KWH 130, 000 115,000 i I i ! 100, 000 i ss,ooo _ ~ 70000 L~r_' T --r--~ _ , Jan-07 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov~07 Dec-07 2007 Electric Power (KW) 300 200 100 Jan-07 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov-07 Dec-07 BUILDING OVERVIEW Constructed in 1996, the Community Center houses an ice arena, gymnasium/fitness center and teen center. Thermal envelope (roof and wall insulation) is excellent but sub-surface moisture penetrations through the lower level walls are creating on-going air quality problems. It appears the facility is operating under a slight negative pressure and the entrance vestibule is a "de-facto" fresh air intake. Under certain wind conditions, a gas odor is noticeable in the entrance vestibule. My suspicion is gas odorant from the radiant furnaces' chimneys is "re- entering" the building through the vestibule area. (Note: Gas odorant is not burned in the combustion process.) With recent upgrades the boilers, chillers, cooling tower, de-humidification, ventilation and radiant heat are in good working condition. - Modification of the refrigerant piping, replacement of the ice sheet chiller system and cooling tower has improved the quality of ice, eliminated annual leak repairs in the cement and significantly improved energy efficiency. - Radiant heat in the spectator area provides occupant comfort while eliminating the "heating mode" operation of the forced air heating & de-humidification system. Radiant provides directional heat for the spectators instead of heating the air in the entire ice arena. The reduction of "wasted heat" significantly reduces the cooling load on the ice chillers. - Adjustable frequency drives (AFDs) were installed on gym, fitness area, teen center and locker room(s) air handlers' supply fans. BUT the locker room ventilation system(s) require a fixed air volume of "fresh outdoor air" provided by the air handler(s) to satisfy the exhaust requirements. Therefore the locker rooms were the incorrect application and the AFDs are essentially operating at full speed, 60 I-iz. Each air handler is controlled by an individual energy management system. - Time clocks control occupied and unoccupied hours. - Fixed setpoints for minimum % outdoor air, mixed air temperature and discharge air temperature provide occupant comfort BUT fixed setpoints limit energy conservation. Two (2) hydronic boilers, high/low fire burners 2200 - 3600 MBTU, are significantly oversized. - Outdoor reset controls discharge water temperature based upon outdoor air temperature. - Minimum boiler operational temperature @ 150 degrees - Both boilers are operated simultaneously all winter. - Warm weather shutdown, WWSD @ 55 degrees, shuts down the boiler and pumps when outdoor air temperature is above 55 degrees. Domestic hot water and Zamboni water is provided 100 gallon tank-style water heaters. Twelve (12) vending/pop machines are situated in three locations and a concession stand is located in the arena. Lighting is a combination of energy efficient T8 fluorescent and metal halide technology. 2007 Annual Electric Usage =1,300,000 KWH (Arena = 59%& Community Center = 41%) CC AC Arena Lights 5% 12% CC Ventilation g% `Arena Vending 1% rena Pumps 6% CC Pumps • 15% Arena entilation 8 0 i CC Vendi ` g 1% CC Lights. 10% ` ; rena Ice Chillers 33% 2007 Annual Gas Usage = 49,000 Therms (Arena = 37% & Community Center = 63%) CC Domestic Hot Water ~ 7% CC Wall/Roof Arena ~ ~ - ~ ~ Heating Dehumification' - 9% 26% j. i Arena BI Radia 7% Arena Zamboni Water 4% C OA Ventilation 47% Arena Community Center 2007 Total Gas $18,757 $31,938 $50,695 Electric $71,558 $49,727 $121,285 TOTAL $90,315 $81,665 $171,980 2007 Annual Electric & Gas Usage = $172,000 (Arena = 52% & Community Center = 48%) Arena Gas 9.1% Community Cente Electric 29% ~ ~r i Arena Electric 41% Community Ce er Gas 19% Supply AFD AC AHU Location hp CFM Hz (60) OA tons Exhaust AH1 Gym 15 20,000 35 25% 48 Atmospheric relief AH2 Fitness Gym 5 6,300 60 25% 12 Atmospheric relief AH3 Teen Center 5 6,100 34 20% 15 Atmospheric relief AH4 Arena 5 6,900 na 20% 20 Atmospheric relief AH5 Locker Rms 5 5,500 60 20% 16 CRE1 &CRE2 AH6 Locker Rms 1.5 2,400 58 40% 6 CRE1 &CRE2 AH7 Arena Locker 1.5 2,000 na 50% 6 CWE1 exhaust AH8 Vestibule 1.5 1,400 na na 3.5 na Total 40 50,600 127 PRV Exhaust Exhaust Location hp CFM CRE1 Women Shower 0.25 1000 CRE2 Men Locker/RR 0.5 2100 CRE3 Resurface/Ref Rm 0.13 405 CRE4 Boiler Rm 0.5 2072 CWE1 Arena Locker Rms 0.25 1200 EF1 Elevator Equip 0.05 134 PEF1 Arena 1.5 9626 PEF2 Arena 0.5 3326 Total 4 Supply AHU Location hp CFM NOTES DH-1 Arena 25 10000 Auto =Relative Humidit Total 25.0 AFD Pumps Location hp Hz (60) HP-1 Heating 7.5 RHP-1 Boiler Re-circulating 3 P-1 AH1, AH2, AH3 3 P-2 Unit Heaters 0.5 P-3 AH6, AH7, AH8 5 P-4 AH4, AH5 1.5 P-5 VAV reheat 0.75 CP-1 Chiller (Tower 10 CP-2 Chiller 20 CP-3 Arena Chiller 1,2 5 CP-4 Arena Chiller 1,2,3 10 CP-3 Tower Sump 3 CP-4 Sub-floor 1.5 CT-1 Cooling Tower Fan 10 40 SP-1 Snow Pit 0.75 DPP-1 Dom Hot Water 0.25 Total 82 REBATES & RECOMMENDATIONS Shakopee Public Utilities provides the following applicable rebates for this facility: o Premium Motors & Variable Frequency Drives o Lighting Retrofit o Custom =Vending Miser 1. Boiler Operation Projected Annual Savings = $1,850 per year Payback < 1 years Each individual boiler is capable of satisfying the heating requirement for the entire facility. The boiler package design includes 100% back-up. Each individual boiler is equipped with an isolation.valve that will allowprimary and back-up operation. The 3 hp re-circulation pump motor was sized for pumping water through both boilers at once. Warm weather shutdown, WWSD is currently set at 55 degrees outdoor air temperature. (Currently the boiler and circulation pumps are shut down whenever outdoor air temperature is above SS degrees. WWSD was originally set at 60 degrees.) a. Reduce WWSD from 55 degrees to 50 degrees and possibly as low as 45 degrees. (Monitor locker room comfort to determine how optimum WWSD temperature.) b. Install an alarm paging system to notify personnel when boiler malfunction occurs. (The alarm system will monitor boiler operation water temperature.) An alarm system will allow elimination of continuous operation of both boilers during the heating season. c. Cycle operation of the two individual boilers monthly and close/open the boiler isolation valves. Month l: Boiler #1 Month 2: Boiler #2 Month 3 Boiler #1 Etc. Assumptions: Standby losses associated with an idling boiler = 1% nameplate Boiler Input = 2200 - 3600 MBTU 1 Therm =100,000 BTU lhp=0.746 KW Motor efficiency = 90% Estimated Annual Operational Hours Existing Proposed Pumps 5500 hours 5000 hours Boiler #1 5500 hours 2500 hours Boiler #2 5500 hours 2500 hours Pumps Location hp HP-1 Heating 7.5 RHP-1 Boiler Recirculating 3 P-1 AH1, AH2, AH3 3 P-2 Unit Heaters 0.5 P-3 AH6, AH7, AH8 5 P-4 AH4, AH5 1.5 P-5 VAV reheat 0.75 21.25 Annual Gas Savings = 2,200,000* 1%*(5500*2 - 2500*2)/100,000 = 1,320 Therms = $1320 per year Annual Savings = 21.25*0.746/90%*(5500 - 5000) = 8,807 KWH = $519 per year Projected Annual Savings = $1,839 per year Estimated Investment Cost of alarm system? < $1500 Estimated Rebate $0 Payback < 1 years 2. Time Clocks Projected Annual Savings = $4,150 per year Payback < 1 years Each air handler is controlled by an individual time clock. - The gymnasium 24-hour time clock is missing an "off" key and operates 24/7. - The teen center occupied hours have dramatically changed. a. Replace the gym' mechanical 24-hour time clock with a 7-day programmable time clock b. Reprogram the Teen Center & Gym occupied hours Teen Center Gym Monday 2 pm - 10 pm 5 am -10 pm Tuesday 8 am - 10 pm 5 am -10 pm Wednesday 2 pm - 10 pm 5 am -10 pm Thursday 8 am -10 pm 5 am -10 pm Friday 2 pm -10 pm 5 am -10 pm Saturday 8 am -10 pm 6 am -11 pm Sunday Noon - 8 pm 6 am - 8 pm TOTAL 74 hours 116 hours Assumptions: 4500 HDD 80% boiler efficiency Cumulative Cooling Load = 1.5 ton-hour per CFM outdoor air AC =1.2 KW per ton Teen Center G~ 5 hp 15 hp Motor efficiency 89.5% 93% Supply 20,000 cfm 6100 cfm AFD 34 Hz 35 Hz airflow 75% 75% Existing Teen Center G tin Monday 5 am -10 pm 24/7 Tuesday 5 am -10 pm 24/7 Wednesday 5 am - 10 pm 24/7 Thursday 5 am -10 pm 24/7 Friday 5 am -10 pm 24/7 Saturday 6 am - 11 pm 24/7 Sunday 6 am - 8 pm 24/7 TOTAL 116 hours 168 hours Fan Savings = (15/93%*(168-116) + 5/89.5%*(116-74))*52*0.746*35/60 = 24,288 KWH = $1,430 per year OA Heat Savings = (20000*25%*(168-116)+6100*20%*(116-74))*75%*24/168*1.08*4500 /(80%* 100000) = 2026 Therms = $2,026 per year OA AC Savings = (20000*25%+6100*20%)*75%*1.5*1.2 /(80%* 100000) = 8,397 KWHs = $495 per year Motor AC Savings = (15/93%*(168-116) + 5/89.5%*(116-74))*20*0.746*35/60*3413*1.2 /12000 = 3,188 KWH = $188 per year Projected Annual Savings = $4,139 per year Estimated Investment (material & labor) $500 Estimated Rebate $0 Payback <1 years 3. VendingMiser Projected Annual Savings = $500 per year Payback < 2 years Pop and candy vending machines operate 24 hours per day. VendingMiser saves energy by using motion sensors to automatically power down the vending machine when the area around it is unoccupied and power up the machine as a potential customer approaches it. While powered down a temperature sensor powers the machine back up as needed to keep drinks cold. - One unit can control up to four vending machines that are located near each other. - Save 24% - 36% of the electricity consumption of a vending machine a. Install VendingMisers in the three locations Vending Miser Pop Candy Location Qty Qty Qty Upper Level 2 4 3 Basement 1 1 Arena 1 2 2 Assumptions: Reduce energy usage 24% (4) VendingMiser Pop Machine = 1 KW @ 40% compressor hours per day Candy Machine = 0.25 KW Annual Savings = (7*1*40%+5*.25)*24*365*24% = 8,515 KWH = $502 per year Estimated Investment $1000 Estimated Rebate Payback < 2 years 4. Lighting Retrofit Projected Annual Savings = $8,400 per year Payback 2.5 years a. Arena: Sixty (60) fixtures Replace 400 watt metal halide fixtures with high output 6-lamp F54T5 fixtures ¦ Existing high light levels are maintained by annual group re-lamp ¦ 6-lamp TS will increase "existing" light levels 15% b. Gym: Thirty (30) fixtures Replace 400 watt metal halide fixtures with 6-lamp F32T8 fixtures ¦ Lamp replacement as they burn out ¦ 6-lamp T8 =Maintain existing light levels c. Fitness Room: Eight (8) fixtures Replace 400 watt metal halide fixtures with linear 8 foot 6-lam~F32T8 fixtures Fixture equipped with "task" specular reflectors. Space /Mounting Hieght, S/VIII < 1.1 ¦ Lamp replacement as needed ¦ 6-lamp T8 =Maintain existing light levels but 8 foot fixture will improve distribution and reduce multiple shadows d. Men Locker Room Install three (3) dual -technology (infrared & ultrasonic) motion sensors e. Women Locker Room Install three (3) dual -technology (infrared & ultrasonic) motion sensors f. Men & Women Restroorns: Four (4) restrooms Install one (1) dual -technology motion sensor in each restroom Assumptions: See enclosed spreadsheet(s) Projected Annual Savings* = 20.27 KW & 92,288 KWH = $8,839 per year Estimated Investment (material & labor) $27,900 Estimated Rebate $5,610 Payback 2.5 years 5. Pumps =Motors & Adjustable Frequency Drives, AFD Projected Annual Savings = $1,300 per year Payback <4 years Installing adjustable frequency drive(s) on pump motors will significantly reduce energy usage. Energy Consumption as a Percentage of Unrestricted Full-Flow Energy Consumption 120% C 100% O 80% 3 N ~ 60% ~ U , ~ 40% d ~ W 20% . 0% 100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 Percentage of Flow -~-Outlet Damper --~---Adjustable Frequency Drive a. Install high efficiency motors and adjustable frequency drives on the following pump b. Control drive frequency based upon static pressure. o The pumps are sized for water flow to satisfy full heat load. Coil actuators begin to close as heating load is satisfied. Consequently pressure increases as flow decreases thereby wasting pumping energy. o Example: RHP-1 pump was sized for operating both boilers at once but only one boiler is required to satisfy heating requirements. Pump Location hp HP-1 Heating 7.5 RHP-1 Boiler 3 P-1 AHl, AH2, AH3 3 P-3 AH6, AH7, AH8 5 Premium Motors & Adjustable Frequency Drives $8.50 per KW $0.0553 per KWH Equip Motor Motor Operating KW KWH Annual ID Size Efficiency Hours Savings Savings Savings HP-1 7.5 91.7% 5000 0.26 8208 $480 RHP-1 3 89.5% 5000 0.13 4663 $271 P-1 3 89.5% 5000 0.13 3500 $207 P-3 5 89.5% 5000 0.22 5837 $345 TOTAL 18.5 0.74 22208 $1,304 Annual Savings Amount $1,304 Motor Investment $5,550 AFD Rebate $555 Motor Rebate $121 Net Investment $4,874 Payback Years 3.7 Projected Annual Savings = 0.74 KW & 22,208 KWH = $1,304 per year Projected Payback <4 years Install Premium Motor HP-1: Heating $8.50 per INV $0.0553 per iNVH Old Motor(s) New Motor(s) Motor Motor Motor Motor Operating KW KWH Size Efficiency Size Efficiency Hours Savings Savings 7.5 88.0% 7.5 91.7% 5000 0.26 1283 TOTAL SAVINGS 0.26 1283 Annual Savings Amount $97 Motor Investment $750 (Motor @ $100/ hp) Motor Rebate $71 Net Investment $679 Payback Years 7.0 Install Adjustable Frequency Drive HP-1: Heatinct 7.5 hp $0.0553 /iNVH 91.7% NEMA Eff Percentage Hours Exist Proposed Savings per of Flow Motor AFD Year KWH KWH KWH 100 100% 105% 1000 6101 6406 -305 90 94% 73% 1500 8603 6681 1922 80 89% 57% 1500 8145 5217 2929 70 83% 44% 1000 5064 2685 2380 TOTAL 5000 27914 20989 6925 TOTAL KWH SAVINGS 6925 TOTAL I(VI?H$ SAVINGS $383 AFD Investment $1,500 (AFD @ $200 per hp) AFD Rebate $225 (AFD @ $30 per hp) Net Investment $1,275 Payback Years 3.3 Install Premium Motor PHP-1: Boiler Re-circulating $8.50 per KW $0.0553 per I(V1IH Old Motor(s) New Motor(s) Motor Motor Motor Motor Operating KW KWH Size Efficiency Size Efficiency Hours Savings Savings 3 85.0% 3 89.5% 5000 0.13 662 TOTAL SAVINGS 0.13 662 Annual Savings Amount $50 (Motor @ $100 per Motor Investment $300 hp) Motor Rebate $0 Net Investment $300 Payback Years 6.0 Install Adjustable Frequency Drive PHP-1: Boiler Re-circulating 3 hp $0.0553 /KVVH 89.5% NEMA Eff Percentage Hours Exist Proposed Savings per of Flow Motor AFD Year KWH KWH KWH 100 100% 105% 0 0 0 0 90 94% 73% 0 0 0 0 80 89% 57% 5000 11127 7127 4001 70 83% 44% 0 0 0 0 TOTAL 5000 11127 7127 4001 TOTAL KWH SAVINGS 4001 TOTAL KWH$ SAVINGS $221 AFD Investment $600 (AFD @ $200 per hp) AFD Rebate $90 (AFD @ $30 per hp) Net Investment $510 Payback Years 2.3 Install Premium Motor P-1: AH1, AH2, AH3 $8.50 per KW $0.0553 per INVH Old Motor(s) New Motor(s) Motor Motor Motor Motor Operating KW KWH Size Efficiency Size Efficiency Hours Savings Savings 3 85.0% 3 89.5% 5000 0.13 662 TOTAL SAVINGS 0.13 662 Annual Savings Amount $50 (Motor @ $100 per Motor Investment $300 hp) Motor Rebate $0 Net Investment $300 Payback Years 6.0 Install Adjustable Frequency Drive P-1: AH1, AH2, AH3 3 hp $0.0553 /iNVH 89.5% NEMA Eff Percentage Hours Exist Proposed Savings - per of Flow Motor AFD Year I~MIH KWH KWH 100 100% 105% 1000 2501 2626 -125 90 94% 73% 1500 3526 2738 788 80 89% 57% 1500 3338 2138 1200 70 83% 44% 1000 2075 1100 975 TOTAL 5000 11440 8602 2838 TOTAL KWH SAVINGS 2838 TOTAL KWH$ SAVINGS $157 AFD Investment $600 (AFD @ $200 per hp) AFD Rebate $90 (AFD @ $30 per hp) Net Investment $510 Payback Years 3.2 Install Premium Motor P-3: AH6, AH7, AH8 $8.50 per INV $0.0553 per iNVH Old Motor(s) New Motor(s) Motor Motor Motor Motor Operating KW KWH Size Efficiency Size Efficiency Hours Savings Savings 5 85.0% 5 89.5% 5000 0.22 1103 TOTAL SAVINGS 0.22 1103 Annual Savings Amount $84 (Motor @ $100 per Motor Investment $500 hp) Motor Rebate $50 Net Investment $450 Payback Years 5.4 Install Adjustable Frequency Drive P-3: AH6, AH7, AH8 5 hp $0.0553 /INUH 89.5% NEMA Eff Percentage Hours Exist Proposed Savings per of Flow Motor AFD Year KWH KWH KWH 100 100% 105% 1000 4168 4376 -208 90 94% 73% 1500 5876 4564 1313 80 89% 57% 1500 5564 3563 2000 70 83% 44% 1000 3459 1834 1625 TOTAL 5000 19067 14337 4730 TOTAL KWH SAVINGS 4730 TOTAL KWH$ SAVINGS $262 .AFD Investment $1,000 (AFD @ $200 per hp) AFD Rebate $150 (AFD @ $30 per hp) Net Investment $850 Payback Years 3.2 6. Test-n-Balance HVAC & Optimization Energy Management System Projected Annual Savings = $4,750 per year Payback 5 years The existing "fixed setpoints" wastefully introduces excessive outdoor air to satisfy the "fixed setpoint" 55 degree mixed air. MA and then reheats to satisfy the "fixed setpoint" 60 degree discharge-air. DA! A variable air volumes sy tem has several components and control strategies: i) Room sensor controls VAV box Temperature satisfied = VAV damper closes to minimum airflow Heating required = VAV damper opens to maximum airflow & reheat coil actuator opens (heating Cooling required = VAV damper opens to maximum airflow & reheat coil actuator closes ii) Static pressure controls fan speed VAV damper @ minimum = Increase static pressure Increase static pressure = Reduce fan speed & reduce airflow = Reduce fan horsepower = Reduce heating and/or cooling iii) Mixed air sensor controls outdoor air damper Mixed air temperature sensor= % Return air + % Outdoor air Minimum % outdoor air = Minimum OA damper iv) Discharge air sensor controls heat coil actuator Discharge air temperature = Mixed air + % actuator heat coil v) Optimization Program reduces excessive heating and/or outdoor air ventilation Warm room (cooling required= Reduce mixed air temperature Reduce discharge air temperature Remaining rooms = Utilize reheat coils as needed A constant volume system has several components and control strategies: vi) Room sensor heating/cooling coils vii) Mixed air sensor controls outdoor air damper Mixed air temperature sensor= % Return air + % Outdoor air Minimum % outdoor air = Minimum OA damper viii) Discharge air sensor controls heat coil actuator Discharge air temperature = Mixed air + % actuator heat coil ix) Optimization Program reduces excessive heating and/or outdoor air ventilation Warm room (cooling required= Reduce mixed air temperature Reduce discharge air temperature Note: Discharge air and mixed air temperature should track each other. Minimum discharge air temperature eliminates excessive reheat of remaining rooms. Test - n -Balance & Optimization a. Test & repair all sensors, actuators, dampers, etc. • You cannot control what you cannot measure! b. Test & balance exhaust systems and minimum outdoor air • Exhaust air =minimum outdoor air requirement c. Upgrade to a centralized energy management system d. Install C02 sensor(s) in Gymnasium, Fitness Gym and Teen Center. Reduce minimum OA from 25% to 5% • High C02 =high occupancy =increased outdoor air requirement • Low C02 =low occupancy =minimal outdoor air requirement e. Program the energy management system to optimize operation. • Optimize mixed air temperature and discharge air temperature to provide "free cooling" and minimize reheat. MA temperature = DA temperature • Minimize reheat Assumptions: Optimize MA & DA setpoints to eliminate excessive outdoor air ventilation. Eliminate 5 degree differential between MA and DA temperatures. 80 of 116 occupied hours per week, 20 weeks per winter Optimize "economizer free cooling" will reduce air conditioning 15% Annual AC = 61,000 KWH C02 sensor will reduce minimum OA during low occupancy hours from 20%/25% to 5%/10% Low occupancy hours = 30 hours per week Cumulative Cooling Load = 1.5 ton-hour per CFM AC = 1.2 KW per ton Supply AFD % % OA MA DA AHU Location hp CFM Hz (60) Flow OA CFM Tem Tem AH1 Gym 15 20,000 35 75% 25% 3,750 55 60 AH2 Fitness Gym 5 6,300 60 100% 25% 1,575 55 60 AH3 Teen Center 5 6,100 34 75% 20% 915 55 60 AH4 Arena 5 6,900 na 100% 20% 1,380 55 58 Locker AH5 Rooms 5 5,500 60 100% 20% 1,100 55 60 Locker AH6 Rooms 1.5 2,400 58 100% 40% 960 55 60 Arena AH7 Lockers 1.5 2,000 na 100% 50% 1,000 55 60 AH8 Vestibule 1.5 1,400 na na na na na Total 40 50,600 Optimize MA & DA = (20000*75%+6300100%+6100*75%)*1.08*5*80*20 /(80%* 100000) = 2,795 Therms = $2,795 per year OA AC Savings = (20000*75%*(25% - 10%)+6300*25%* 100%*(25% - 10%) +6100*75%*(20%- 5%)*1.5*1.2 = 6,986 KWHs = $411 per year AC Economizer = 61000* 15% = 9,150 KWHs = $539 per year C02 Heat Savings = (20000*75%*(25% - 10%)+6300* 100%*(25% - 10%) +6100*75%*(20% - 5%~* 1.08*30/168*4500/(80%* 100000) = 1010 Therms = $1,010 per year Projected Annual Savings = $4,754 per year Estimated Investment (material & labor) $25,000 Estimated Rebate $0 Payback 5 years 7. High Efficiency Front-End Boiler System • Center Point may provide rebates Projected Annual Savings = $7,450 per year Payback 5 years Hydronic condensing boilers sty em e~ciency increases up to 95% ef~ciency at partial load. As discharge water temperature drops below 180 degrees, condensing of combustion flue gases occurs and boiler efficiency dramatically improves, up to 95%. i) Install two (2) 500 MBTU high efficiency boiler system and side arm storage tanks to provide heating and domestic hot water for showers ¦ Utilize the 399MBTU Knight boilers as the primary front-end heating ii) Replace two 100-gallon water heaters and provide domestic hot water with high efficiency boilers ¦ Two 100 gallon Amtrol storage tanks (Eliminate $7,000 replacement costper water heater = $14,000!) iii) Install controls and actuator to active original boilers only during extreme weather ¦ The original boilers are only required during extreme weather morning warm-up. iv) Continue rotating original boilers monthly but activate operation only when outdoor air temperature is less than 10 degrees! Investment $40,000 Rebate $2000 (Center Point Energy) Net Inwestment $38,000 Payback 5 yrs Area U Value Sg Ft CFM MBTUH Roof(s) 0.050 22,500 0 62 Windows & Doors 0.500 200 0 6 Sidewall(s) 0.100 9,000 0 50 OA Ventilation 14000 832 Total 948 MBTU .Output 55 Indoor-Outdoor Temp 95% Design Efficiency Input 998 MBTU Input High Efficiency Front-End Boiler(s) Arena DHW Heat TOTAL 06-07 Annual Gas Usage 18,800 3,500 27,500 49,800 Normalized Amount $19,176 $3,570 $28,050 $50,796 Mild Cold Severe Seasonal Total Weather Weather Weather Efficiency Savings Percentage Annual HDD 40% 40% 20% _ _ Heating Therms 11,000 11,000 5,500 DHW Therms 1,400 1,400 700 Arena Therms =Not applicable) (Dehumification & Zamboni) Existing Boiler System Efficiency 55°l0 70% 80% 66% Proposed System Efficiency 94% 90% 80% 90% Annual Heat Savings (Therms) 4,564 2,444 0 7,008 Existing DHW System Efficiency 80% 80% 80% 70% _ Proposed DHW System Efficiency 88% 88% 88% 90% _ Annual DHW Savings (Therms) 127 127 64 318 Annual Therm Savings 7,326 Annual Savings $7,473 Eliminate Firm Gas Meter $0 Total Annual Amount Savings $7,473 * The existing boiler would operate during extreme weather as needed. Closing the Facility Privatizing the Facility Expansion through Expansion Through Public No changes PubliclPrivate Partnershi Finance Positives Negatives Positives Negatives Positives Negatives Positives Negatives Positives Negatives Possible Potential growth conflicts in future in costs a reements Ability to market Partnership concept could still be an unknown option for sub- - leasing certain com onents Construction Equity growth for costs maybe the city higher Loss of control of Meets larger building diversity of growing needs All ready own land for development Could fix current issues with the building (e.g. water infiltration Fits needs of growing community ~3~`~~Chr1~c v~ ~ Community Center Task Force Options Summary Closing the Facility Privatizing the Facility Expansion through Expansion Through Public No changes PubliclPrivate Partnership Finance Positives Negatives Positives Negatives Positives Negatives Positives Negatives Positives Negatives Building would No center hub Transfer Fees may Prior precedence Legal costs Total control Selling the No additional Lack of progress provide storage for the city's problems to increase in metro area of facility concept to the work needed for the city recreation and someone else public other services Possible equity Possible Could May loose sports Could expand at Revenue driven Pride of Economic Short term would Slow decline of for sale of reduction in subcontract association and today's costs vs. from expansions ownership climate down avoid conflict interest building administrative activities to school district future costs and controversy support for someone else partnerships. associations No public Negative impact Less staffing Possible loss of The city can Fees may Fees lower than Lack of expertise Citizens will pay subsidy on local costs future equity on focus on certain increase private or in certain areas more in subsidy economy building goals and the partnership per year private sector on others Cut back on Lack of pride May result in an Loss of control More potential Limited Costs would be City financing Future costs for employee costs expansion of options partnership subsidized by options limited expansion would services options future city growth increase Waste of an Similar efforts Would bring City's financial Revenue More difficult to investment not common expertise in commitment subsidy to the attract members marketing. unknown city instead of rivate sector Additional Park Enhanced Time line longer Could stage Higher operating & Rec. office community for expansion expansion costs over time space needed resources options without additional revenue Loss of building Serve future Loss of city Flexibility of Building would rental charge for growth identity facility usage decline over time the city Does not serve Branded by Reduction in future growth corporate name legal fees vs. partnership Loss of equity Bidding would be an option