期刊
ENERGY AND BUILDINGS
卷 209, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.enbuild.2019.109673
关键词
Phase change material (PCM); Enthalpy model; Concrete masonry unit (CMU); Transient heat transfer
资金
- National Natural Science Foundation of China [51508232]
- Natural Science Foundation of Jiangsu Province [BK20150521]
- China Postdoctoral Science Foundation [2016M600371]
- Jiangsu Province Postdoctoral Science Foundation [1501106B]
- Jiangsu Government Scholarship for Overseas Studies and Scientific Research
- 2016 Excellent Young Key Teachers Training Project of Jiangsu University
- Scientific Research Starting Foundation for Advanced Talents of Jiangsu University [15JDG049]
It is important to accurately predict the transient heat transfer process through building envelopes that have been enhanced with phase change materials (PCMs). An improved two-dimensional (2D) model, based on the enthalpy method, is presented in this paper. The proposed model handles, among other features, PCM's thermo-physical parameters, various melting and solidification temperature ranges, and multiple temperature turning points during phase change, more precisely than existing models (Zhang et al., 2011; Sharma et al., 2006; Sadasivam et al. 2011) [1-3]. The model was verified against experimental data from measurements in a concrete masonry units (CMUs) wall outfitted with PCMs. The results from the model verification indicated that the deviations of the proposed model were less than 0.40 degrees C for standard deviation and 0.80 degrees C for maximum deviation under the studied conditions. The corresponding relative errors were less than 2.9% for standard deviation and 5.7% for maximum deviation. The proposed model is necessary for the accurate calculation of and prediction of transient heat transfer through wall in the presence of PCMs. (C) 2019 Published by Elsevier B.V.
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