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Integrated hollow porous ceramic cuboids-finned heat pipes evaporative cooling system: Numerical modelling and experimental validation

机译：集成的空心多孔陶瓷长方体翅片式热管蒸发冷却系统：数值模拟和实验验证

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摘要

The work presented in this paper investigates design, computer modelling and testing of a sub-wet bulb temperature evaporative cooling system for space air conditioning in buildings. The target application of evaporative cooling technology is particularly for geographical regions with hot and dry climate. A laboratory prototype made of integrated finned heat pipes and a water filled hollow porous ceramic cuboids was been built and tested. The design exploits the high thermal conductivity of heat pipes as effective heat transfer device and the good wettability characteristic of porous ceramic material. Key thermal performance metrics of the prototype were modelled and validated experimentally under controlled laboratory conditions of temperature (30, 35 and 40 degrees C) and relative humidity (35-55%). Under typical dry climates conditions (ambient air dry bulb temperature of 35 degrees C and relative humidity of 35%), the measured supply air dry bulb temperature was 22.3 degrees C, which is lower that the ambient air wet bulb temperature, and maximum cooling capacity of approximately 196W per unit surface area (m(2)) of wet porous ceramic cuboid. Furthermore, it was shown that the measured prototype cooler wet bulb effectiveness was 1.05 while the dew point effectiveness was 0.73. (C) 2019 Elsevier B.V. All rights reserved.
机译：本文介绍的工作研究了用于建筑物空间空调的亚湿球温度蒸发冷却系统的设计，计算机建模和测试。蒸发冷却技术的目标应用尤其适用于气候炎热干燥的地理区域。建造并测试了由集成翅片式热管和注水的中空多孔陶瓷长方体组成的实验室原型。该设计将热管的高导热率用作有效的传热装置，并利用多孔陶瓷材料的良好润湿性。在温度（30、35和40摄氏度）和相对湿度（35-55％）的受控实验室条件下，对原型的关键热性能指标进行建模和实验验证。在典型的干燥气候条件下（环境干球温度为35摄氏度，相对湿度为35％），测得的送风干球温度为22.3摄氏度，低于周围空气湿球温度和最大制冷量湿多孔陶瓷长方体的每单位表面积（m（2））约196W。此外，已表明，所测量的原型冷却器湿球效率为1.05，而露点效率为0.73。 （C）2019 Elsevier B.V.保留所有权利。

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