Fridge not working - Page 3 - Fiberglass RV


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Old 05-27-2015, 10:19 PM   #29
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I appreciate your experience, but RV absorption refrigerators don't use a compressor. There's a condenser, an evaporator, an absorber and a generator (the boiler). So, the heat provides the energy to start the cycle.

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I am fully aware that the refrigerators in our trailers are an absorption type and do not have a compressor. My point was that ammonia is also used in compressor systems as a refrigerant. Freon is not the only thing that is used as a refrigerant .
I worked on old residential cooling systems that also used propane as a refrigerant . The propane systems employed a compressor not a heat source
The propane systems were replaced with Freon because of code changes and the hazards propane presented. I have also worked on cooling systems that were single pass well water systems .One system was pumping 600,000 gallons of groundwater / hour through the cooling system and then directly down the sewer.
The absorption refrigerators in our trailers are not energy efficient, require more maintenance and do not cool as well as a compressor refrigerator but they work for our application.
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Old 05-27-2015, 11:14 PM   #30
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Quote:
Originally Posted by steve dunham View Post
I am fully aware that the refrigerators in our trailers are an absorption type and do not have a compressor. My point was that ammonia is also used in compressor systems as a refrigerant. Freon is not the only thing that is used as a refrigerant .
I worked on old residential cooling systems that also used propane as a refrigerant . The propane systems employed a compressor not a heat source
The propane systems were replaced with Freon because of code changes and the hazards propane presented. I have also worked on cooling systems that were single pass well water systems .One system was pumping 600,000 gallons of groundwater / hour through the cooling system and then directly down the sewer.
The absorption refrigerators in our trailers are not energy efficient, require more maintenance and do not cool as well as a compressor refrigerator but they work for our application.
Thanks. I knew I had to be misreading your comments. You're right about these fridges too. Over at the Escape Forum there are a ton of members who have had fridge issues - especially when the ambient temperatures are warm. Some have gone to great lengths, adding several solar panels for example, and replacing the absorption fridge with a compressor based model.
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Old 05-28-2015, 05:40 AM   #31
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NH3 or ammonia is in-fact a refrigerant. It is designated as R717.
It is widely considered as one of, if not THE most efficient refrigerant.

There are no refrigerators that use "coolant", only refrigerant.
The only exception to that would be some kind of liquid chiller system using a remote condensing system to cool perhaps a glycol solution that is then used to cool a cabinet.
Even then, the phase exchange system responsible for the actual heat pumping has refrigerant in it.
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