Optimizing cooling performance of infrared transparent condensation-free radiant cooling by using bubble wrap

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2024-11-25 DOI:10.1016/j.ijthermalsci.2024.109568

Jiaan Gu , Huijun Wu , Zhuwei Xie , Xudong Wei , Ke Du , Gongsheng Huang , Xinhua Xu

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引用次数: 0

Abstract

Radiant cooling system has well acknowledged as one of high-performance air conditioning techniques for the energy-saving and thermal comfort. However, it faces the defects of easy condensation and limited cooling capacity in hot and humid climates. Herein, aiming at improve condensation-free safety and cooling capacity, a novel radiant cooling panel covered by using bubble wrap was proposed. Firstly, a reduced-scall experiment on the cooling performance of the radiant cooling by using bubble wrap was conducted. Secondly, a three-dimensional transient heat transfer model of the bubble wrap assisted cooling panel was established and validated with the experimental results. Thirdly, by using the model the orthogonal investigation was conducted by using various bubble geometric parameters such as bubble height (H), diameter (D), and spacing (L). The effects of the bubble geometric parameters on the cooling performance of the radiant cooling panel were explored. Finally, aiming at greater cooling capacity and higher condensation-free safety, the optimization of the bubble geometric parameters was conducted for the design of the radiant cooling panel. The results indicated that the optimal combination of bubble geometry parameters could be H = 5 mm, D = 5 mm, L = 20 mm aiming at the maximum cooling capacity of 127.24 W/m². For the application of the radiant cooling panel in humid environment, the optimal combination of bubble geometry parameters could be selected as H = 20 mm, D = 15 mm, L = 5 mm for maintaining a higher air contact surface temperature to avoid condensation. It demonstrated the potential of the bubble wrap being used in high performance cooling panel in humid environment.

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利用气泡膜优化红外透明无冷凝辐射制冷的冷却性能

辐热冷却系统是公认的节能和热舒适的高性能空调技术之一。然而，它也面临着在湿热气候条件下易结露和制冷能力有限的缺陷。为了提高无结露安全性和冷却能力，本文提出了一种新型气泡膜辐射冷却板。首先，对使用气泡膜的辐射冷却器的冷却性能进行了减缩实验。其次，建立了气泡膜辅助冷却板的三维瞬态传热模型，并与实验结果进行了验证。第三，利用该模型，通过气泡高度（H）、直径（D）和间距（L）等各种气泡几何参数进行了正交研究。探讨了气泡几何参数对辐射冷却板冷却性能的影响。最后，以更大的冷却能力和更高的无冷凝安全性为目标，对辐射冷却板的设计进行了气泡几何参数的优化。结果表明，气泡几何参数的最佳组合为 H = 5 mm、D = 5 mm、L = 20 mm，最大冷却能力为 127.24 W/m2。对于在潮湿环境中应用辐射冷却板，气泡几何参数的最佳组合可选为 H = 20 毫米、D = 15 毫米、L = 5 毫米，以保持较高的空气接触表面温度，避免冷凝。这证明了气泡膜在潮湿环境中用于高性能冷却板的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.