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Water Heat Circulator
wrote re air conditioning with a
Tap water heat exchanger
- No wall mount required
- No electricity used
- Will it provide enough cooling?
You _might_ cover the ceiling with lots of cold water pipes :-) Warming
1000 pounds of water per hour (about 2 gpm) 10 F would provide 10K
Btu/h of cooling. If the air-water temp diff is 10 F, with a 1.5
Btu/h-F-ft^2 slow-moving airfilm conductance, you'd need about
10K/(10x1.5) = 667 ft^2 of pipe, eg 67 4"x10' pipes, but that might not
dehumidify well, even if some condensation occurs, and it would waste a
lot of water.
If you really wanted to do this, you might make a tank around the hot
fins of a cheap window AC and fill it with oil (to avoid corrosion) and
pump lots of 110 F oil through a heat exchanger to warm 0.4 gpm of 60 F
water to about 110 F. Z = 0 and E = 1-e^(-NTU) = 0.9 makes NTU = 2.3 =
60A/200, so A = 6.7 ft^2, eg a 3"x10' copper pipe inside a 4"x10' PVC
pipe. You might pump the still-pressurized hot water back into the hot
water pipe in your apartment, where it might eventually push some cold
water out of the bottom of the water heater for the apartment building.
Nick
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