12-26-19, 09:42 PM | #11 | |
Helper EcoRenovator
Join Date: Dec 2019
Location: Northern Utah
Posts: 49
Thanks: 1
Thanked 2 Times in 2 Posts
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Quote:
I took some measurements off my radiator well water geoheater in the greenhouse tonight. Its been running about 2 hours. Single wall polycarbonate 14' x 14' greenhouse outside air is 26F inside air is 37F Heater output is 45F No sure of CFM Input air temp measured 38F Water inlet temperature is 55F Water outlet temperature is 46F Flow is 1.2 GPM So to figure BTU's per hour 60min x 1.2 GPM = 72 gallons per hour BTU's per Gallon @ deg per gallon extracted = 9 deg x 8.3 per gallon= 74.7 BTU's per Gallon 74.7 x GPH 72 = 5378 BTUs per hour This is equal to about 1.57 Kwatts per hour of electrical heating. I'm using .2KWH with the blower and well pump running. So my COP for just using a radiator and fan is 7.85 ??? |
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