Heat Pump Water Heater - Coil in Tube
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So here's what I have so far. A copeland scroll compressor 115V (hopefully find 208v eventually). Made a coil of 20' of 3/8" soft copper by winding around a 2" PVC pipe. Inserted into a 4" PVC tube - capped sealed and ready to pipe in high side compressor. pic:
http://ecorenovator.org/forum/attach...121502_081-jpg http://ecorenovator.org/forum/attach...103752_298-jpg http://ecorenovator.org/forum/attach...103802_648-jpg http://ecorenovator.org/forum/attach...103829_237-jpg |
A pretty small 5000BTU/hr compressor will probably be plenty if it's only for DHW.
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Ummm, how did you seal around the 3/8 tubing? |
Sealed using a high temp automotive epoxy - 600 deg.tolerance.
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Just wondering about dissimilar materials and the liquid pressure. I guess we will see.
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Could be improved. Will have poor heat transfer because of very low water velocity in contact with cu tube. Water will flow straight thru the center.
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That is known as a "high density" exchanger and if you mount it vertically it may not need a water pump. If you run a pump the water is going to need to do multiple passes to get hot.
Now, on to the hard part: the refrigerant circuit! I'm riveted and wish you the best of luck. |
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Here is how he did his coils: ...abd here is how he implemented his plastic shell: He ended up modifying his basic design a bit. Yours may work right the first time. Good luck! -AC |
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