IPWG agenda 120700 - Laserfiche WebLink

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I old i Any natatorium design that expects to comply with the intent of the Town ordinance should include detailed consideration of these qualitative improvements : Waste heat recovery for dehumidification reheat , outdoor air preheat , and pool water heating . • Automated controls for economizer , ventilation , filtration pumping and space and water temperature control . • Solar pool water heating . Automated pool covers to ories of energy efficiency features under Sec . 5A 1 1 , 6 . The Town ordinance lists thirteen ca g 9y Y items (a . - g . ) . The designer for the new aquatic facility must provide written documentation that explains , how . these features are incorporated into the design , or if not, justify why these features were not included in the design . 7. If installed together , .some of the potential energy features will result in competing interactions , particularly waste heat recovery from dehumidification and solar pool water heating . This interaction will most occur in the . summer months when maximum amounts of wheat energy will be produced by both types of systems and the demand for pool water heating is lowest . This interaction will require additional analysis to insure that potential energy savings are not overestimated . SOLAR AND RENEWABLE ENERGY DESIGN OPTIONS The Town energy efficiency ordinance specifically requires the designer to evaluate the ' Use of renewable energy for heating and swimming pools' . ' Note that any solar technology included' in ' the design helps the Town meet a partnership commitment to the U . S . Department of Energy's Million Solar Roofs initiative program (website ; www . eren . doe . gov/millionroofs ) o Further, low/no cost technical assistance is available to the designer and the Town through the NC Solar Center in Raleigh . Available services include pre-design analysis and consultations (website : www. ncsc . ncsu . edu ) . 1 . Solar pool water heating Pool water heating with roof-mounted solar panels is , likely the most cost effective , renewable energy ' application available for • this facility. Indoor swimming & pa do ools require low 'temperature ; heat and no :. separate storage systems : All collected solar heat is transferred directly into the pool water. A simplified calculation performed with . the U . S . Department of Energy's , Energy Smart Pools software : . program estimates that , for a 25 meter by 25 yard pool , an unglazed collector - system will save the new. , aquatics: center *.$4 ,400 per .year on water heating. . costs: See *,attached repo to*. * . *6900 • 0 • • Consequently solar pool water heating is likely one of the two most used solar building. technologies , in the U . S . 2 . Transpired solar collectors Transpired . solar collectors are used, on commercial . buildings with large , outdoor . air ventilation requirements such as natatoriums . The transpired solar collector is a simple concept Take a sheet of metal ; perforate it with numerous small holes , paint it black or some other dark .color that fits the building ' design , • mount It on a sunny, south . wall , I'eaving space between ' the main building wall and the metal ; and use fans • to suck wair through the small holes . The dark metal• absorbs the solar heat . The fans pull - the fresh air • into the plenum , heating it and drawing it into the building' s vent ilation • system . On. . , sunny days , this - solar air preheating system can significantly contribute to the swimming pool ventilation requirements .