This paper aims to disclose the resistance features of plate heat exchanger, a common heat transfer device and a major producer of flow resistance. For this purpose, the author examined the flow features within the plate heat exchanger, and established a resistance calculation model for the exchanger. hen, the model was solved through both numerical simulation and mathematical analysis. On this basis, an actual plate heat exchanger was simulated by the model, with the aim to acquire the exchanger resistance and the flow distribution across different paths. The results show that the deviation between the calculation results and the test results was 5.8%; the path flow decreased with the increase in the distance between the path and the inlet; the decline was steep at the beginning, and disappeared at the path sufficiently far away from the inlet. In summary, this research identifies the resistance of plate heat exchanger, and obtains the flow distribution of each path in the exchanger. Suffice it to say that the research findings provide new insights into the resistance calculation of plate heat exchangers in actual engineering.
Plate heat exchanger, Flow distribution, Resistance features
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