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

机译：集成中空多孔陶瓷立方体 - 翅片热管蒸发冷却系统：数值建模和实验验证

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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：本文提出的工作研究了建筑物空间空调的副湿式灯泡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特别适用于具有炎热和干燥的气候的地理区域。建立并测试了由集成的翅片热管制成的实验室原型和水填充的空心多孔陶瓷长方体。该设计利用热管的高导热系数作为有效的传热装置和多孔陶瓷材料的良好润湿性特性。在温度（30,35和40℃）和相对湿度（35-55％）的受控实验室条件下，在实验上进行建模和验证原型的主要热性能度量。在典型的干燥气候条件下（环境空气干泡温度为35℃和相对湿度为35％），所测量的供应空气干泡温度为22.3℃，较低的环境空气湿灯泡温度和最大冷却能力降低湿多孔陶瓷长方体的每单位表面积（M（2））约196W。此外，显示测量的原型冷却器湿灯泡有效性为1.05，而露点效果为0.73。 （c）2019 Elsevier B.v.保留所有权利。

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