Switch heat exchanger
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Recently, a switching heat exchanger was simulated, with an inlet temperature of 30°C, pressure of 0.8 barg, flow rate of 3000 Nm3/h, and molar flow rates of 0.28 for methane, 0.68 for nitrogen, 0.02 for water, 0.015 for carbon dioxide, and 0.005 for hydrogen sulfide. The exhaust temperature is -80°C, the pressure is 0.5 bar, and it is required that the levels of moisture, carbon dioxide, and hydrogen sulfide in the exhaust be within 10 ppm. According to research, these impurities freeze in the LNG heat exchanger during heat exchange, and after a certain period of time, the pipes are switched to blow them out. The Peng-Robinson equation was selected for the physical properties, but when entering these parameters in HYSYS, the composition of the outlet gas is exactly the same as that of the inlet gas; I’m not sure how to proceed. Could some expert please take a look? There are those switching valves that I still haven’t added.
HYSYS is a process simulation software; of course, the inlet and outlet must be the same, as that is necessary for mass balance – problems arise only when they are not the same. What you described are process operations; software cannot carry out such “operations”
It is recommended to install a separator for the exhaust gas. . . :Lol, and then look at the gas-phase components. .