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Thread: compressor discharge temps
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26-01-2011, 11:11 AM #1
compressor discharge temps
Any advice on R22,R407c and R410A expected compressor discharge temps?
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26-01-2011, 11:53 AM #2
Re: compressor discharge temps
Welder,
It all depends on the pressure ratio, discharge/suction pressure and superheat temperature...and also of the compressor type and brand.
it could be between 50ºC...120ºC but also it could be out of this range...like I said all depend of the operating conditions.To make progress is never good enough, I want to do better and better and better
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26-01-2011, 12:07 PM #3
Re: compressor discharge temps
If I not mistaken, besides compressor type it also depends on type of oil...
In some places will have to think ...
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26-01-2011, 12:15 PM #4
Re: compressor discharge temps
yes, also agree. However I think that have a 2nd order importance.
To make progress is never good enough, I want to do better and better and better
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26-01-2011, 12:17 PM #5
Re: compressor discharge temps
Hi Welder
Not to sure about the other refrigerants but I was taught (when I was younger) for R22, 12 or 502 the rule of thumb was around 21°C above ambient for the condensing temp. I'm sure some members could give an example range for the others for general ambient conditions how ever extreme ambients could differ a little.
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26-01-2011, 12:24 PM #6
Re: compressor discharge temps
To make progress is never good enough, I want to do better and better and better
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26-01-2011, 12:26 PM #7
Re: compressor discharge temps
You really can call a rule of thumb only...
To make progress is never good enough, I want to do better and better and better
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26-01-2011, 01:16 PM #8
Re: compressor discharge temps
Sandro Baptista I only wrote a general rule of thumb for gerneral conditions and it can be applied to varying evap temps. As these three gases have their temp ranges - low, med and high. With your age you should know this as a general rule of thumb. Welder is asking what the expected cond temps are and I have written what I would expect for one of the gases. Can we not give what might be expected for the other gases for general conditions even if there may be exceptions?
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26-01-2011, 01:29 PM #9
Re: compressor discharge temps
Tesla, he asked about discharge temperature and it varies a lot with the operating conditions that's why we should indicate a range of temperatures. If he want more accurancy then he should gives precise parameters.
Even if he asked about expected condensing temperature that's depends on the weather conditions and condenser selection criteria. In conclusion that could vary a lot.To make progress is never good enough, I want to do better and better and better
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26-01-2011, 02:49 PM #10
Re: compressor discharge temps
ok Suction 5 deg ambient 12 deg?
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26-01-2011, 03:10 PM #11
Re: compressor discharge temps
12ºC ambient...what's the condensing temperature you want to use? it depends on the DT.
To make progress is never good enough, I want to do better and better and better
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26-01-2011, 05:04 PM #12
Re: compressor discharge temps
27? condensing
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26-01-2011, 05:26 PM #13
Re: compressor discharge temps
-5ºC(saturated temperature)/+27ºC(saturated temperature) measure at inlet and outlet of the compressor.
Considered type of compressor: piston
R22 » +55ºC
R407C » +60ºC
R410A » +50ºC
Hope this helps
Note: Approximate temperatures. suction superheated temperature considered = 6KTo make progress is never good enough, I want to do better and better and better
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26-01-2011, 05:29 PM #14
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26-01-2011, 11:25 PM #15
Re: compressor discharge temps
With those refrigerants listed I would assume that you are looking mainly at AC equipment.
If you are worried about the maximum temperatures then compare notes with the manufacturers fault finding instructions.
When you get to the page with F??, High Discharge Temperature, it will give you the tripping temperature.Brian - Newton Abbot, Devon, UK
Retired March 2015
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27-01-2011, 05:01 PM #16
Re: compressor discharge temps
Ok thanks gents.I have checked the unit suction is 0 discharge is 50 C ,ambient is 8.6 c.R22 Does that sound about right?
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28-01-2011, 09:52 AM #17
Re: compressor discharge temps
It seems okay comparing with the preview discharge temperatures indicated and having in account that the pressure ration is a little less.
To make progress is never good enough, I want to do better and better and better
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