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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 - PowerPoint PPT Presentation
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Kendrick Pool Heating Projectfor the City of Kendrick
Friday, December 4th, 2009
Team iHeat
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Problem StatementDevise a cost-effective heating method to bring the city pool
to 80F by Kendrick Locust Blossom Festival at the end of May.
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Primary Client Needs• Safety• Energy Conservation• Temperature• Longevity• Low-cost
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ModelingWater heating energy requirements (52F to 80F)Percent shading at pool site RETScreen modeling software
Useful solar gainAverage ambient temperature in Kendrick
Current thermal blanket usageLocal Fuel Costs
ElectricityPropane
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Considered Solutions
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Features:Gas heater provides initial
warm-up.Sustained solely
through solar array and cover.
Benefits:Accommodates insufficient
sunlight.Minimizes size of heater
and size of solar array.Minimizes cost
SolutionHybrid System
POOL
FILTERS
SURGE TANKS
PROPANE
HEATER
SOLAR ARRAY
MAIN PUMP
BOOSTER PUMP
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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
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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
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Lexan Panel Option
Design Characteristics:• PVC manifolds• 6mm clear twin-wall
Lexan• painted black• chemically welded
Performance Characteristics• Comparable efficiency to
spiral design• High sensitivity to sun
angle compared to spiral• Ongoing testing
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Economic Analysis System Major Components Fixed Cost
Pure Solar-Commercial Solar Panels
$7.00/ft2 x 2400 ft2
Large Pump$18,800
Pure Solar- iHeat Spiral $2.25/ft2 x 2400 ft2
Large PumpExpensive Framing
$10,500
Pure Propane 1,200,000 BTUH Heater $20,000
Hybrid Solution 350,000 BTUH Heater$ 2.25/ft2 x 385 ft2
Small PumpMinimal Framing
$5,850
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RecommendationsOptimize 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
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Site Plan
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Site Plan
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Site Plan
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Questions
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