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Performance Definitions for Three-Fluid Heat and Moisture Exchangers

机译:三流体换热器的性能定义

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This paper presents performance definitions for calculating the overall effectiveness of three-fluid heat and moisture exchangers. The three-fluid heat and moisture exchanger considered in this paper is a combination of a liquid-to-liquid heat exchanger for heat transfer between a desiccant solution and a refrigerant and an energy exchanger for heat and moisture transfer between desiccant solution and air streams. The performance definitions presented in this paper are used to calculate the overall sensible and latent effectivenesses of a three-fluid heat and moisture exchanger, which has been tested under air cooling and dehumidifying operating conditions in a previous work (Abdel-Salam et al., 2016, "Design and Testing of a Novel 3-Fluid Liquid-to-Air Membrane Energy Exchanger (3-Fluid LAMEE)," Int. J. Heat Mass Transfer, 92, pp. 312-329). The effectiveness of this three-fluid heat and moisture exchanger is compared when calculated using the traditional energy exchanger effectiveness equations and the overall performance definitions. Results show that the overall performance definitions provide effectiveness values that are less sensitive to changes in the inlet refrigerant temperature and therefore are more generally applicable for energy exchanger design than the traditional effectiveness equations used in the literature.
机译:本文介绍了用于定义三流体热湿交换器整体效率的性能定义。本文考虑的三流体热交换器是将液-液热交换器用于干燥剂溶液和制冷剂之间的热传递,以及将热交换器用于干燥剂溶液和空气流之间进行热和水分的组合。本文介绍的性能定义用于计算三流体热湿交换器的整体显着和潜在的有效性,该交换器在先前的工作中已在空气冷却和除湿的工作条件下进行了测试(Abdel-Salam等, 2016年,“新型3流体液-气膜空气交换器(3流体LAMEE)的设计和测试”,《国际传热学杂志》,第92页,第312-329页)。使用传统的能量交换器效率方程式和整体性能定义进行计算时,将比较此三流体热交换器的效率。结果表明,总体性能定义所提供的有效性值对进口制冷剂温度的变化不太敏感,因此,与文献中使用的传统有效性方程式相比,该值更适用于能量交换器设计。

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