In a Ammonia Refrigeration System (Hermetic Reciprocating Compressor), it will always happend that Refrigeration Lubricant carry over to Evaporator and cause bad heat transfer to damanged to compressor, anyone know how to control and what happening ?
2006-07-20 14:22:02 · 2 answers · asked by Raja Chai 2 in Science & Mathematics ➔ Engineering
Perhaps you need a knock out pot in discharge from compressor to separate and remove oil. Or if you have one is this not functioning properly for some reason?
2006-07-20 16:41:03 · answer #1 · answered by Robert A 5 · 0⤊ 0⤋
I don't have a lot of experience with refrigeration systems, and I am unaware of vapor compression refrigerators that use ammonia as the refrigerant, but I suppose it is possible.
It sounds as if the evaporator is not functioning well so some liquid refrigerant makes it to the compression stage. And of course, compressors do not like to handle liquids. There are a few things you could do if liquid is detected near the compressor inlet. One, you could reduce the amount of refrigerant in the system, you may just have overcharged the system with ammonia. Two, you could simply shut down the compressor until the liquid has a chance to evaporate. Or Three, you could have an adjustable expansion valve that would decrease flow into the evaporator. Other arrangements may involve floats and valves.
The link below has a little discussion about handling oil and controlling evaporator liquid levels.
2006-07-20 15:53:41 · answer #2 · answered by Anonymous · 0⤊ 0⤋