Air Conditioner or Refrigerator Start-up and Transient Conditions
Air Conditioner or Refrigerator Start-up and Transient Conditions
(OP)
Hello,
I am looking for some information on the start-up and transient condtions of an air conditioning or refrigeration cycle. I know how to calculate the steady state operation of the refrigeration cycle. However, I am unaware on what happens when the AC cycle is started and how long it would take to reach steady-state conditions. Would any of you be able to recommend a good source text or some other source, person, etc. that would be able to point me in the correct direction?
I am interested in using a propane refrigerant cycle, but it will probably be under varying conditions, so this is a critical aspect that I need to know more about.
Thanks in advance
I am looking for some information on the start-up and transient condtions of an air conditioning or refrigeration cycle. I know how to calculate the steady state operation of the refrigeration cycle. However, I am unaware on what happens when the AC cycle is started and how long it would take to reach steady-state conditions. Would any of you be able to recommend a good source text or some other source, person, etc. that would be able to point me in the correct direction?
I am interested in using a propane refrigerant cycle, but it will probably be under varying conditions, so this is a critical aspect that I need to know more about.
Thanks in advance





RE: Air Conditioner or Refrigerator Start-up and Transient Conditions
Principles of Refrigeration and Air Conditioning by Roy J Dossat is a good book. Check the ASHRAE handbooks.
PS: I think you should be a bit specific.
Regards,
RE: Air Conditioner or Refrigerator Start-up and Transient Conditions
Transient analysis of refrigeration systems is a pita.
RE: Air Conditioner or Refrigerator Start-up and Transient Conditions
In effect: If you can get an idea of the real thermal capacitance of the confines you are trying to cool, you can convert it to a tank of vapor at initial (saturation) temperature, then calaculate how fast your compressor could pump it to a second tank at a constant pressure, the pressure of the first tank decaying with respect to time...That's a transfer problem, which for small tanks being pumped into large, the Corken's and Howden's of the world have calculated many times for a variety of gases. Its also been done for large volume pipe lines to establish the frequency of pumping stations and similar.