Calculation of heat exchanger thermal efficiency
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This post was last edited by WoAiMaoMaoRan on 2016-1-6 at 09:14. Two methods. 1. Introduction to the calculation: The heater module is used, with logistics entering and exiting once each. Calculate the heat load of the heat stream and the cold stream separately when they enter and exit the heat exchanger individually, and then determine the ratio. 2. For detailed calculations, use the HeatX module; with two streams entering and two exiting, input the geometric parameters of the heat exchanger and run the simulation to obtain its efficiency. My questions are: Is the first calculation method correct? Is the heat load of the heat exchanger at this point representative of the actual heat change in the streams, or does it include factors such as the heat transfer coefficient of the heat exchanger itself? For the second method, I simulated several heat exchangers – why do some results show an efficiency value while others show no data at all?
The heat transfer efficiency is as the original poster said: calculate the heat load of the heat stream and the cold stream separately when they enter and exit the heat exchanger, and then determine the ratio. I think it has little to do with the heat transfer coefficient of the heat exchange equipment itself! The heat transfer coefficient should be the factor that determines the size of the heat exchange equipment.