Abstract
Abstract The paper presents a Computational Fluid Dynamics (CFD) numerical study for a new design of a plate heat exchanger with two different flow patterns. The impact of geometric characteristics of the two studied geometries of exchanger plates on the intensification process of heat transfer was considered. The velocity, temperature and pressure distributions along the heat exchanger were examined. The CFD results were validated against experimental data and a good agreement was achieved. The results revealed that geometrical arrangement of the plates strongly influence the fluid flow. An increase in the Reynolds number led to lowering the friction factor value and increasing the pressure drop. The configuration II of the plate heat exchanger resulted in lower outlet hot fluid temperature in comparison with the configuration I, which means improvement of heat transfer.
Highlights
Plate heat exchangers have been frequently studied[1, 2] due to their broad application in a wide range of industries including air conditioning and heat pump coils, steam power boilers, home heating convectors as well as wasteheat recovery[3]
In order to increase the effectiveness of plate heat exchangers, a multi-pass design of several manifold microchannel segments was proposed by Arie et al.[5]
The results showed that the heat performance of optimized cross cut wavy fin was enhanced by a maximum of 23.81% more than for a typical wavy fin
Summary
Plate heat exchangers have been frequently studied[1, 2] due to their broad application in a wide range of industries including air conditioning and heat pump coils, steam power boilers, home heating convectors as well as wasteheat recovery[3]. To estimate the optimum performance of the heat exchanger, a hybrid computational method was developed based on solution of full 3D Navier-Stokes and energy equations in a microchannel segment of the heat exchanger in combination with 1D momentum and mass balance equations in manifolds. Another solution was presented by Goodarzi and Nouri[6]. Power consumption for handling the coolant flow increases in comparison to the original solution They noticed that sinusoidal separating plate increased heat transfer performance compared to the flat one. Finned and wavy walls generate secondary flows along the flow direction which increase the local convective heat transfer coefficient
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