Dear Mutt:
I normally use Aspen for most of my simulation, and other property info. however, my present organization do not have any simulator. So, I am looking around for get something free, and easily implementable in Excel.
Using NIST webbook, you can get baisc data. Years ago it used to be free call "Steam67", presently they also charge. So do few others applictions. However, I saw one link to France, but if you are an US or Canadian resident, then you can not download from their site. Furthermore, we have to contact someone in NIST for getting the program! Anyway, I am looking around.....
Thanks for you suggestion
Bando