Xiaobai asks for advice
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The values in the book – when I checked them using software, they don’t seem to match: 287.7*28.957=8330.9 kj/kmol? This is why
It is recommended to check the source of the software first.
The source of the software is fine; the values I obtained using refprop are pretty similar as well
Well, I’ll check again the input conditions…… It seems unlikely that there would be errors in such data in the book. I remember that in early software, things like this often happened with ∑ addition – pirated software explained that; P
The specific enthalpy of air at 288 k/574 kPa in Unisim is -341.1 kj/kmol; it is suspected that this value is related to the choice of reference level
It is also important to note the relationship between gauge pressure and absolute pressure: if it is not specified in the book, it refers to gauge pressure; whereas if it is not specified in the software, it refers to absolute pressure, right?