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Open AccessArticle

Performance Analysis of PCM Ceiling Coupling with Earth-Air Heat Exchanger for Building Cooling

by Shilei Lu 1,2,*, Bin Liang 1,2, Xinhua Li 1,2, Xiangfei Kong 3, Wei Jia 4 and Lu Wang 3
1
School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
2
Tianjin Key Laboratory of Built Environment and Energy Application, Tianjin University, Tianjin 300350, China
3
School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
4
Beijing Huahou Energy Technology Co., Ltd., Beijing 101500, China
*
Author to whom correspondence should be addressed.
Materials 2020, 13(13), 2890; https://doi.org/10.3390/ma13132890
Received: 3 May 2020 / Revised: 16 June 2020 / Accepted: 24 June 2020 / Published: 27 June 2020
(This article belongs to the Special Issue Phase Change Materials for Thermal Energy Storage)
In recent years, the systematic application of phase change materials (PCM) is continuously developing. In this paper, an innovative PCM ceiling coupled with earth-air heat exchanger (EAHE) cooling system was proposed for building cooling. The system aimed to combine the cooling capacity of soil and the energy storage capacity of PCM, thus improving the indoor thermal environment. Performance of the system was tested by experimental method while data analysis focused on the indoor side. To research the effect of cold storage time on the performance of the system, two different operation strategies were adopted for comparison: 8-h cold storage strategy and 12-h cold storage strategy. Moreover, a control group was set up to observe the performance of the system on indoor temperature under the same weather conditions. The result showed that the experimental room in which we installed this system could reduce peak temperature by 2.1 °C under 8-h timed cold storage strategy and 2.7 °C under 12-h timed cold storage strategy. What is more, under the two operation strategies, temperature and heat flux of the PCM ceiling had similar distribution characteristics. Different strategies mainly affected the sustainability of the system and phase transition efficiency of the PCM ceiling. View Full-Text
Keywords: phase change material; ventilated ceiling; earth-to-air heat exchanger; operation strategy phase change material; ventilated ceiling; earth-to-air heat exchanger; operation strategy
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Lu, S.; Liang, B.; Li, X.; Kong, X.; Jia, W.; Wang, L. Performance Analysis of PCM Ceiling Coupling with Earth-Air Heat Exchanger for Building Cooling. Materials 2020, 13, 2890.

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