Determination of the heat transfer coefficient
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During the selection of heat exchangers, the value given in the specifications is the heat transfer area. To determine this area, it is necessary to know the overall heat transfer coefficient. How is this overall heat transfer coefficient determined? Wouldn’t it be more appropriate to have the flow rate specified in the specifications? This post was last edited by 218home on 2009-3-16 at 11:51
You can infer the heat transfer coefficient based on the process conditions; additionally, the heat transfer coefficient is determined by the type of heat exchanger and the properties of the fluid. It is related to factors such as dirt thermal resistance, and the forum is currently discussing this topic; you can go take a look. http://bbs.hcbbs.com/thread-416768-1-1.html
Based on the type of root heat exchanger and the fluid distribution, an empirical heat transfer coefficient is used to select a suitable value for this coefficient. The logarithmic mean temperature difference is then calculated, and the heat exchange area is determined using the heat balance equation. Finally, a suitable model is chosen based on this heat exchange area, followed by further verification