Regarding the issue of material properties, I’ve searched for a long time but haven’t found any place where it can be downloaded for free or a solution to this problem
Thread Content
I’m looking for something that allows me to easily find various properties of substances, preferably one that can be downloaded. For example, nitrogen, and its thermal energy under various temperature and pressure conditions. . . Will negative pressure have an effect on its thermal energy? How to calculate it? (It is the inlet of the exhaust fan.) What about a mixed medium? For example, given the nitrogen, carbon dioxide, oxygen, etc. (known concentrations, flow rates, and mixture temperature), how can one calculate the thermal energy contained in the mixture?
I’m looking for something that allows me to easily find various properties of substances, preferably one that can be downloaded. For example, nitrogen, and its thermal energy under various temperature and pressure conditions. . . Will negative pressure have an effect on its thermal energy? How to calculate it? (It is the inlet of the exhaust fan.) What about a mixed medium? For example, given the nitrogen, carbon dioxide, oxygen, etc. (known concentrations, flow rates, and mixture temperature), how can one calculate the thermal energy contained in the mixture?
You can check out the Physical Properties and Thermochimistry Database of the Chinese Academy of Sciences; there might be what you need there. Website: http://www.enginchem.csdb.cn/sdb_2004/all_thermochemistry.html
Data like this is sometimes difficult to obtain; I usually use simulation software such as CHEMCAD to get this kind of information. For substances that are already known in such software, the values obtained are relatively accurate. If the values are generated using the methods provided by the software, they need to be evaluated. Personally, I think this approach is simpler, as it’s often hard to find data that meets the required standards
http://bbs.hcbbs.com/redirect.php?tid=85287&goto=lastpost You might find what you’re looking for here
It is more convenient to calculate mixtures using process simulation software; Aspen Plus, PROII, HYSYS, ChemCAD, etc., can be used for this purpose.