AC Hacker wrote:
It would be helpful if we also knew:
what the BTU rating of your compressor was?
what is the water flow rate in each loop?
how long the copper/PVC HX was?
what was the temp of water in and out of each HX?
what was the temp of refrigerant in and out of each HX?
what do the details of the ends of each HX look like? In other words, how do you take the water from the HX and how do you take the refrigerant from the HX?
If we had enough examples of homemade HX performance, then we could begin to build them with more confidence.
Randen:
The BTU rating for the compressor was 2T or 24,000 BTU
The water flow for the testing 20 ltr/min or 4.5gal/min
The length of copper tube for each HX is about 25 ft. I then trimmed 1 - 2 ft to fit
The temp of the water in and out is a 2 C deg. gain or loss for either HX.
The refrigerant Condensor in 65 C deg. out 40 C deg (all the heat is given up to the glycol/water)
The refrigerant Evaporator in I did check but really frosty out 4 C deg and again all the heat had been taken up by the glycol/water.
For the end of HX tubes I will have to post some drawings and photos.
The effiency seems quite good I was very suprised. I believe that th HXs could be used with a larger compressor. The lenghts of tube where a guess and what I had on hand. The biggest thing is to always run the water/refrigerant counter-current. I will be busy installing the HP this week (it getting cold here)but after that I will post results with photos but better the results keeping me warm in the shop??
Randen
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