Abstract

Plate heat exchangers (PHEs) are widely used in multiple industries and applications ranging from refrigeration to paper, oil and gas, chemical and power industries. In the current study, a novel wavy pattern design is introduced for chevron-type PHEs in order to improve the overall performance of the heat exchanger. The new plate design is manufactured and tested within an experimental test rig. A numerical heat transfer model is also developed to analyze variations of the heat exchanger pressure drop and heat transfer coefficient. Hydraulic and thermal performance of the new plate pattern is investigated using the numerical model and experimental test rig. The effects of the proposed plate pattern on the thermal efficiency and pressure drop of the PHE are compared with those of a conventional plate pattern. Experimental and numerical results confirm that the heat transfer rate is virtually constant in the new designed PHE, while the pressure drop decreases remarkably. Consequently, the performance of the developed wavy chevron pattern is increased by about 10–15% in comparison with conventional chevron patterns.

摘要

板式换热器 (PHE) 广泛用于多个行业和应用，从制冷到造纸、石油和天然气、化工和电力行业。在当前的研究中，为人字形 PHE 引入了一种新颖的波浪图案设计，以提高热交换器的整体性能。新的板设计是在实验测试台内制造和测试的。还开发了数值传热模型来分析换热器压降和传热系数的变化。使用数值模型和实验试验台研究了新板型的水力和热力性能。将所提出的板型对 PHE 的热效率和压降的影响与传统板型进行了比较。实验和数值结果证实，新设计的 PHE 中的传热速率几乎恒定，而压降显着降低。因此，与传统的人字形图案相比，开发的波浪形人字形图案的性能提高了约 10-15%。