Abstract
Printed circuit heat exchanger is considered as an promising candidate for floating storage and regasification unit of liquefied natural gas due to its high compactness and efficiency. The flow maldistribution is an essential issue in practical applications of the printed circuit heat exchanger, which leads to the performance degradation. In this study, the flow distribution of supercritical natural gas in a printed circuit heat exchanger plate is three-dimensionally simulated, and the thermal-hydraulic performance of the channels is investigated. To save the computational cost, a simplified two-dimensional model is proposed. The comparisons of results between the two- and three-dimensional models show that the effects of backflows, vortex, interaction between properties and flow distribution are the reasons that result in the differences between the two models. The findings suggest that the simplified two-dimensional model is capable for engineering demands with the satisfaction of computational accuracy and efficiency. It helps to overcome numerical difficulties and save computational resources in engineering applications such as the PCHE design.
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