Mollier charts

[RIK-MAY]

Rob,

ive familiarised myself with the software and it seems very helpful.

only thing is that I'm not 100% sure on where to enter all my info. Il list all the required fields it's asking for and hopefully you can help.

evap temp
superheat
dp evaporator
dp suction line
dp discharge line
isentropic efficiency
condensing temp
subcooling
dp condenser
dp liquid line

can you tell me exactly what these mean. Some are obvious but the "dp" part especially has me scratching my head.

Sorry to grill you on all this but if I don't ask I won't know.

[Rob White]

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Rob

[Rob White]

Rob,

ive familiarised myself with the software and it seems very helpful.

only thing is that I'm not 100% sure on where to enter all my info. Il list all the required fields it's asking for and hopefully you can help.

evap temp (found by using gauges to measure suction pressure / temp. Evap temp)
superheat (Found by measuring the suction pipe temp and comparing to evap, gauge temp)
dp evaporator (pressure drop over evap. Ignore for now that is more complex)
dp suction line (pressure drop over suction pipe. Ignore for now)
dp discharge line (Pressure drop over discharge pipe. Ignore)
isentropic efficiency (leave as set. This is the compressors efficiency and more complex)
condensing temp (found from gauges. Discharge pressure / temp)
subcooling (found from measuring liquid pipe (before expnsion valve) and comparing to gauge temp)
dp condenser (pressure drop over condenser. Ignore for now)
dp liquid line (pressure drop over liquid pipe. Ignore for now)

can you tell me exactly what these mean. Some are obvious but the "dp" part especially has me scratching my head.

Sorry to grill you on all this but if I don't ask I won't know.

See what I've put in the brackets.

Rob

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[RIK-MAY]

That's better. I only remember posting 4 points on a chart. Makes much more sense now.

thanks a lot for your help.