WelshEngineer87
Automotive
Hi all,
I'm sure there is a really easy answer to this question but can't figure it out at the moment. I'm trying to workout what is the enthalpy condition in the suction line of an AC compressor to calculate isentropic efficiency.
The condition i have is 2.5bar suction pressure at a temperature of 6degC, based on the pH diagram this would relate to an enthalpy of around 400-410Kj/kg, however in the superheated tables for R134a at the same pressure and temperature the value is more like 250-260kJ/kg.
I have no idea why it's different on the chart than it is in the table. Any suggestions?
Regards
I'm sure there is a really easy answer to this question but can't figure it out at the moment. I'm trying to workout what is the enthalpy condition in the suction line of an AC compressor to calculate isentropic efficiency.
The condition i have is 2.5bar suction pressure at a temperature of 6degC, based on the pH diagram this would relate to an enthalpy of around 400-410Kj/kg, however in the superheated tables for R134a at the same pressure and temperature the value is more like 250-260kJ/kg.
I have no idea why it's different on the chart than it is in the table. Any suggestions?
Regards