Journal
ENERGY AND BUILDINGS
Volume 37, Issue 3, Pages 215-220Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.enbuild.2004.06.017
Keywords
thermal energy heat storage; shape-stabilized PCM; under-floor electric heating
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This paper put forward a new kind of under-floor electric heating system with shape-stabilized phase change material (PCM) plates. Different from conventional PCM, shape-stabilized PCM can keep the shape unchanged during phase change process. Therefore, the PCM leakage danger can be avoided. This system can charge heat by using cheap nighttime electricity and discharge the heat stored at daytime. In the present work, the thermal physical properties of shape-stabilized PCM developed by us were measured. A prototype room with this system was set up in Beijing to testify its thermal performance and feasibility of this heating mode. The results show that temperature of the PCM plates upper surface can be kept near the phase transition temperature in whole day and a lot of off-peak period electricity can be used for space heating in stead of using peak period electricity, which obviously lowers the electricity tariff. (C) 2004 Elsevier B.V. All rights reserved.
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