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Thread: measure sub-cooling
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24-09-2010, 06:34 PM #1
measure sub-cooling
Can anybody tell me,which is the correct point to take high pressure to measure sub-cooling.At compressor discharge valve or at liquid line before the expansion valve???
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24-09-2010, 06:59 PM #2
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Re: measure sub-cooling
For checking that you have enogh subcooling to prevent flash gas before TXV, at liquid line before expansion valve.
For checking refrigerant charge, at condenser outlet.
Pressure should be measured where temperature is measured. If not possible, than you need to take in consideration pressure drop from measuring point of pressure to measuring point of temperature.Last edited by nike123; 24-09-2010 at 07:03 PM.
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24-09-2010, 07:34 PM #3
Re: measure sub-cooling
How can you calculate pressure drop nike??
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24-09-2010, 08:45 PM #4
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Re: measure sub-cooling
You could use Cool-pack.
But, if length of pipes and number of fittings are small you could round that pressure loss or ignore it, if you could picture in your head how much approximately that would be.
Try with excersizeing on real examples from your work by noting pipe diameters, pressures and temperatures, power of system and then calculate in Cool-pack. That will give you feeling.
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25-09-2010, 07:34 AM #5
Re: measure sub-cooling
What is coolpack?
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25-09-2010, 07:50 AM #6
Re: measure sub-cooling
Nike,
You're very patient
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25-09-2010, 08:11 AM #7
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Re: measure sub-cooling
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25-09-2010, 08:12 AM #8
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25-09-2010, 08:21 AM #9
Re: measure sub-cooling
Thanks for the information nike
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