Thank you for the link to the program, RGasEng. I was able to install it and generate some numbers. Aside from a few difficulties with printing tables or generating a Mollier chart, this should be a great help.
Thanks again
I've read with interest several of the threads on this or similar subject.
I'm trying to determine the resulting temperature drop of hydrogen gas (99% purity) when a steady flow is expanded from 125psig at 60F to 80psig through a pressure regulator and then from 80psig to approximately 1psig...