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Erschienen in:
2020 | OriginalPaper | Buchkapitel
Annual Thermal Evaluation of Lightweight Building Envelopes Containing Phase Change Materials in Changsha
verfasst von : Xiaoqin Sun, Siyuan Fan, Youhong Chu, Yajing Mo, Shuguang Liao
Erschienen in: Proceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2019)
Verlag: Springer Singapore
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Abstract
Integrating phase change materials (PCMs) into building envelopes is a promising way to reduce building energy consumption and to improve indoor thermal comfort. This paper analyzed the thermal performance of building envelopes containing PCMs under full weather condition in a hot summer and cold winter region. Two identical houses located in Changsha were built, experimented, and simulated. In the absence of HVAC in summer, installing XPS-PCM next to the wall interior surface reduced the average indoor air temperature by 1.1 °C during office hours. Moreover, the peak load was delayed by 1 h and shifted out of the office hours. The energy use intensity (EUI) in summer and whole year was reduced by 21.9% (29.7 kWh/m2) and 8.6% (22.0 kWh/m2), compared to a wall without PCMs, respectively. In winter, the XPS-PCM position has less impact on the indoor thermal comfort. It is recommended to install the XPS-PCM board next to the wall interior surface with a night ventilation of 20 ACH.