Enthalpy 1

[kolahefereshte]

Enthalpy for R113 refrigerate at specified state is read from qualified table(American society of heating, ...) and 'EES' software, but the quantity differs from the enthalpy which is read from the 'REFROP' software or qualified table 'nist'. the units are same 'kj/kg'. Enthalpy of other substance like water is same in looking up from every table and software but for 'R113' not.

T=25[c] and p=0.044831[mpa]

please help me. thank you.

 

[chicopee]

Do an internet search on the unit Pascal and you'll discover a sleuth of articles on unit conversions

 

[EmmanuelTop]

"Absolute" enthalpy values are different because they have been calculated based on certain reference conditions, which vary from one source to another. You need to look at enthalpy difference between two states, and for the same set of inlet/outlet conditions this delta H should be the same, regardless of the data source.

Dejan IVANOVIC
Process Engineer, MSChE