期刊
BUILDING AND ENVIRONMENT
卷 81, 期 -, 页码 334-339出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.buildenv.2014.07.012
关键词
Phase change material; Partially-melted; Thermal performance; Building wall
资金
- National Natural Science Foundation of China, China [51308104]
- Natural Science Foundation of Jiangsu Province of China, China [BK20130625]
- Specialized Research Fund for the Doctoral Program of Higher Education, China [20130092120002]
- China Postdoctoral Science Foundation, China [2013M530226]
To figure out the effects of PCM location on the thermal performance of building walls, the effects of the state of a kind of salt hydrate phase change material (PCM) on its phase change performance were researched by the differential scanning calorimeter (DSC) tests and the cooling experiments. The three different PCM states are the not-melted state, the partially-melted state, and the fully-melted state, respectively. The experimental results showed that PCM state had great effects on the degree of supercooling and the phase change performance of PCM. When the PCM was in the partially-melted state before cooling, it was able to release the latent heat quickly, while when the PCM was in the fully-melted state before cooling, its degree of supercooling was large. Because the temperature ranges of PCM during the thermal cycles were different when the PCM was placed in different locations in the wall, the PCM location had significant effects on its state, and as a result, on the phase change performance of PCM and the thermal performance improvement of building walls. (C) 2014 Elsevier Ltd. All rights reserved.
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