Why is the default heat transfer coefficient for Aspen so low?
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It’s only 0.0203019 cal/(s·m²·K); 1 cal is also just 4.18 J. Shouldn’t the heat transfer coefficient K be in the hundreds or thousands?
Based on Q=KA*T, it can be determined that if the heat transfer coefficient is low, it is definitely because the heat exchange area A has been set too large. In HYSYS, heat exchanger calculations only yield the KA value; it’s not clear what the values for Plus and EDR are. It is recommended that the original poster investigate thoroughly the settings related to the heat exchange area