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Experimental and numerical analysis of solar-absorbing metallic facade panel with embedded heat-pipe-array
Applied Energy ( IF 10.1 ) Pub Date : 2020-03-09 , DOI: 10.1016/j.apenergy.2020.114736
Wenjie Liu , Tin-Tai Chow

The integrative performance of advanced building façade is important for sustainable building development. This paper introduces two solar-absorbing curtain-wall panels with embedded straight-heat-pipe and heat-pipe-ring respectively. Taking advantage of the high thermal conductance of heat pipe, the proposed solar-absorbing aluminum panels can preheat cold water, like for the domestic hot water supply. They also reduce the solar transmission to the indoor space. In hot summer, the dual effect leads to considerable energy saving in both the hot-water and the air-conditioning systems. Comparing with the water-tubing collector panel, the heat-pipe type has wider application by eliminating the water-freezing problem. The conceptual design, prototype construction and computer-model development of these two panels are discussed in this paper. Measurements were taken with the two prototypes installed at an outdoor environmental chamber. Dynamic simulation models were then developed through the control volume finite difference method, and validated with the measured data. The simulation models can be used in advanced building simulation tools for transient thermal performance analysis. Further numerical analysis with these models showed that comparatively, the innovative heat-pipe-ring is the more promising design because of the effective increase in solar absorbing surface area. In the studied warm climate scenarios from summer to winter and from sunny to cloudy conditions, the water heat gain efficiency was estimated from 62.5% to 94.9% in all cases with the glazed panel. The estimated room heat gain/loss as well as the electricity saving performance are also attractive.



中文翻译:

嵌入式热管阵列太阳能吸热金属外墙板的实验与数值分析

先进建筑立面的综合性能对于可持续建筑发展至关重要。本文介绍了两种分别嵌入直热管和热管环的太阳能吸收式幕墙板。利用热管的高导热性,拟议的吸收太阳能的铝板可以预热冷水,就像用于家用热水一样。它们还减少了向室内空间的太阳能传输。在炎热的夏天,双重影响导致热水和空调系统的大量节能。与水管集热板相比,热管型通过消除水冻结问题而具有更广泛的应用。本文讨论了这两个面板的概念设计,原型构建和计算机模型开发。使用安装在室外环境室内的两个原型进行了测量。然后通过控制体积有限差分法开发动态仿真模型,并用实测数据进行验证。仿真模型可用于高级建筑仿真工具中,以进行瞬态热性能分析。这些模型的进一步数值分析表明,相对而言,创新的热管环是更有前途的设计,因为有效增加了太阳能吸收表面积。在研究的夏季到冬季以及从晴天到多云的温暖气候场景中,使用玻璃板的情况下,在所有情况下,水的热量获取效率估计为62.5%至94.9%。估计的房间热量损益以及节电性能也很有吸引力。

更新日期:2020-03-09
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