200 likes | 347 Views
Team iHea t. Kendrick Pool Heating Project. for the City of Kendrick Friday, December 4 th , 2009. Problem Statement. Devise a cost-effective heating method to bring the city pool to 80F by Kendrick Locust Blossom Festival at the end of May. Primary Client Needs. Safety
E N D
Team iHeat Kendrick Pool Heating Project for the City of Kendrick Friday, December 4th, 2009
Problem Statement • Devise a cost-effective heating method to bring the city pool to 80F by Kendrick Locust Blossom Festival at the end of May.
Primary Client Needs • Safety • Energy Conservation • Temperature • Longevity • Low-cost
Modeling • Water heating energy requirements (52F to 80F) • Percent shading at pool site • RETScreen modeling software • Useful solar gain • Average ambient temperature in Kendrick • Current thermal blanket usage • Local Fuel Costs • Electricity • Propane
SolutionHybrid System SURGE TANKS • Features: • Gas heater provides initial warm-up. • Sustained solelythrough solar array and cover. • Benefits: • Accommodates insufficient sunlight. • Minimizes size of heater and size of solar array. • Minimizes cost POOL MAIN PUMP BOOSTER PUMP SOLAR ARRAY FILTERS PROPANE HEATER
SolutionPropane Heater (400,000 BTUH) • Cost: • Initial: • $2500 (Heater)$1500 (Installation, Lines) = $4000 • Annual : • $500 (Propane, Tank Rental) • Longevity: 10+ yrs • Time to heat: 7 days
SolutionSpirals (385 ft2 Array) • Materials: • Drip hose, PVC pipe and fittings, framing, booster pump. • Cost: • Initial: • $850 (14 panels)$1000 (pump)= $1850 • Annual : • $200-$400 • Longevity: 10+ yrs
Lexan Panel Option • Design Characteristics: • PVC manifolds • 6mm clear twin-wallLexan • painted black • chemically welded • Performance Characteristics • Comparable efficiency to spiral design • High sensitivity to sun angle compared to spiral • Ongoing testing
Recommendations • Optimize current system: • Fix leak • Utilize surge tank capacity • Reroute sand filter backwash plumbing • Maximize pool cover use • Prune trees • Implement Hybrid System • Install propane heater and propane tank • Build and plumb solar array • Implement differential controller system