|
i could be wrong here - i'd have to think about it some more. i would avoid igeos and other equations of state and try the following:
1. at -20 you know it's saturated vapor. therefore, you also know the specific volume, I believe. you're in a confined volume, and the r134 is a gas. thus, as long as you're strictly in vapor phase, specific volume is constant.
2. i *think* that you can therefore perform an interpolation using information in the table, at 20 deg. C and the given specific volume, and back out the pressure. I believe this will eliminate any theoretical assumption of equation of state representation, and give an answer that is empirically based.
/could be wrong
__________________
You don't love me, you just love my piggy style
|