Let’s discuss a few issues in the Pro2 simulation!

1. When simulating heat exchangers, with the tube-side and shell-side being gas and liquid respectively, what value is pressure drop generally set to? This is mainly determined by analyzing the specific circumstances – it depends on the inlet pressure as well as the conditions of the heat exchanger. Generally, the pressure drop does not exceed 80 kPa, unless it’s a very large heat exchanger. 2. What is the typical efficiency level for centrifugal compressors? 3. The efficiency of reciprocating compressors? 4. Pump efficiency? 5. Efficiency of the cold compartment? The default efficiency for ordinary software is 75%! Anyway, I usually set it to this value; it varies depending on the device. It’s recommended to check the relevant specifications. 6. What is the typical pressure drop of natural gas after passing through the equipment? Setting it to 30 kPa or 50 kPa in the software makes little difference, haha. For our simulations, we use the SRK01 equation of state – what about everyone else? For natural gas simulation, SRK can be used, or PR as well

1. When simulating heat exchangers, with the tube-side and shell-side being gas and liquid respectively, what value is pressure drop generally set to? I usually use 0.7 kg/cm2 when doing simulations. The specific pressure drop still needs to be calculated using specialized heat exchanger simulation software. This number in PROii doesn’t mean much. Personal opinion.