Kompulsa
25-02-2012, 01:50 PM
Hello.
I always thought that refrigerator compressors were far more expensive per BTU than the air conditioner compressors because an 820 BTU is almost as expensive as a 9,000 BTU air conditioner compressor. When I looked at Embraco's R-134a fridge compressor datasheet, I realized that that 820 BTU rating was at a temperature of -23.3 C, which is much colder than the temperatures at which the air conditioner compressors operate, and cooling capacity drops.
The same datasheet showed that the cooling capacity of the R-134a compressor is 1,768 BTU at -10 C, which is still far colder than an air conditioning unit. -10 C is the highest temperature the datasheet provides performance details on.
The EER is also 8 at -10 C and 4 at -23 C. Maybe the cooling capacity of this compressor could be much higher than 1,768 BTU if operated at a temperature of 10 C above 0? Does anyone know how much I can expect from it at temperatures above 0? That would be helpful.
I guess the main concern is whether or not these compressors are capable of reliably operating at higher evaporator temperatures since they are designed for refrigerators which operate below 0?
Or is it the other way around...I was told that my R22 air conditioner compressor would overheat too much at temperatures below 7 C, so maybe it is the other way around? I would love some insight into this...
Thank you. :)
I always thought that refrigerator compressors were far more expensive per BTU than the air conditioner compressors because an 820 BTU is almost as expensive as a 9,000 BTU air conditioner compressor. When I looked at Embraco's R-134a fridge compressor datasheet, I realized that that 820 BTU rating was at a temperature of -23.3 C, which is much colder than the temperatures at which the air conditioner compressors operate, and cooling capacity drops.
The same datasheet showed that the cooling capacity of the R-134a compressor is 1,768 BTU at -10 C, which is still far colder than an air conditioning unit. -10 C is the highest temperature the datasheet provides performance details on.
The EER is also 8 at -10 C and 4 at -23 C. Maybe the cooling capacity of this compressor could be much higher than 1,768 BTU if operated at a temperature of 10 C above 0? Does anyone know how much I can expect from it at temperatures above 0? That would be helpful.
I guess the main concern is whether or not these compressors are capable of reliably operating at higher evaporator temperatures since they are designed for refrigerators which operate below 0?
Or is it the other way around...I was told that my R22 air conditioner compressor would overheat too much at temperatures below 7 C, so maybe it is the other way around? I would love some insight into this...
Thank you. :)