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Presentation on the results of our built solar heating and cooling system for our house. Presentation highlight testing methods and results.
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Solar Heating with Cooling
Elliott Layus
Ben Ly
Lily Duncan
Problem: Testing the residential heating and
cooling system our team designed.
anti-scald valve
radiator
winter
winter
summer
summer
summer
cooling tower
storage tank propelene
glycol tank
collector
DHW
radiator
Testing: Setup and Procedure
Solar Panel Test Setup
• Test Performed using the primary tank storage (50 gallon tank)
Heat Exchanger Test
• Test Performed using the Storage Tank
Cooling Test Setup Test Performed using the Secondary storage tank (250
gallon tank)
Testing Equipment
• Thermocouples
• Data Logger
Piping
Thermal Wells
Other Testing
Flow-Tests
• Domestic Hot Water Hose
• Solar Panels
• Cooling Tower
Test Results
Results: Solar Response
Domestic Hot Water
Heat Rate:
Cost of Natural Gas: $.995/Therm
Cost Savings of Test: .04869
Gallons Used in Test: 22.5
Domestic Hot Water
• Savings per gallon .00322
• Weekly Estimated Usage
– Showers =472.5
– Laundry =160
– Dishes =20
– Sink =75
727.5
Weekly Savings $2.34/Week $121.70/yr
Delivers: 100 MJ/day
Costs: 14.08 MJ/day
COP: 7.10
Solar Space Heating
Total Gains from Useful Heat
October November December January Febuary March April
(Mega Joules)/day 134 130 41 43 106 103 118
Actual(Mega
Joules)/day 150 133 100 100 133 150 180
Savings ($/day) 1.80 1.60 1.20 1.20 1.60 1.80 2.30
Average
1.70
Total$306/year
Cooling Tower
• A tank response test was performed for 1 hour
• The tank was cooled by 2.5 K (275 gal.)
• 11.12 Mj of energy was rejected
• A standard efficiency A/C unit would provide
2.85 MJ
• Actual savings depends on conditions of surrounding and usage pattern
Cooling cycle: Storage Tank Response
284
286
288
290
292
294
296
298
300
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
Tem
pe
ratu
re (
C)
time (hours)
Cooling cycle for week of July 27, evening
Tank temperature
wetbulb temp
Cost BreakdownSavings per Year:
$4287 year payback
Cooling Tower Fabrication
Resin $135.00
Glass $60.00
Sheet Metal $30.00
Vents $10.00
Pipe Fittings $20.00
Paint $44.00
Pads $24.00
Screws and Fasteners $30.00
Roofing Material $14.00
Fan $22.00
Power Inverter $50.00
Redwood $25.00
Fiberglass Tools $20.00
Fiberglass Prep Materials $35.00
$519.00
Solar Panels and Mounting
Solar Panel Package- 2pumps
8 3x7 Solar Panels $900.00
Mounting Hardware $348.00
$1,248.00
System Configuration
2 Tanks $150.00
Pipes and Fittings $720.00
Fans $44.00
Heat Exchangers $116.00
Pumps $162.00
$1,192.00
Total $2,959.00