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p-h chart for refrigerants

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AKVS24

AKVS24

Mechanical
Joined
Mar 22, 2012
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9
Location
SG
In p-h chart for all refrigerant,why the pressure vs enthalpy curve doesnot start from zero pressure ?
 
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Mostly to make the chart look pretty and avoid lots of empty space, or (in the case of low-pressure refrigerants) avoid not providing all of the important information.
 
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