Regarding the heat exchanger model in HYSYS
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I would like experts to explain in detail the specific differences between weighted and endpoint in HYSYS’ heat exchanger model. Thank you!
· The weighted heating curve is divided into small segments, with each segment undergoing energy exchange separately. For each small segment on the heating curve, an LMTD and UA are calculated, and then the average UA of the heat exchanger is determined by summarizing these values. The Weighted method is only applicable to counterflow heat exchangers. · For each endpoint, an LMTD and a UA are calculated for the inlet condition and the outlet condition respectively. For cases such as those without phase transitions and with a relatively constant Cp, this option is sufficient. -------------------------The above is excerpted from the Daqing Simulation Training of CNPC, 《HYSYS 2004 Training Manual》--------------------------