A new kind of phase change material (PCM) for energy-storing wallboard

• Published in: Energy and buildings Vol. 40; no. 5; pp. 882 - 890
• Main Authors: Chen, Chao, Guo, Haifeng, Liu, Yuning, Yue, Hailin, Wang, Chendong
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 2008; Elsevier
• Subjects: Applied sciences; Buildings; Buildings. Public works; Computation methods. Tables. Charts; Effective heat capacity method; Energy conservation; Exact sciences and technology; Experiment; External envelopes; Heat transfer of PCM; Materials; Miscellaneous (including polymer concrete, repair and maintenance products, etc.); New PCM energy-storing wallboard; Structural analysis. Stresses; Wall covering (rendering, paint, wall paper); Effective heat capacity method; Heat transfer of PCM; Energy conservation; New PCM energy-storing wallboard; Experiment; Performance evaluation; Wall covering; Heat capacity; Theoretical study; Experimental study; Composite material; Paper; PCM material; Computing method; Heat transfer; Energy storage
• ISSN: 0378-7788
• DOI: 10.1016/j.enbuild.2007.07.002

A new kind of phase change material (PCM) for energy-storing wallboard is introduced in this paper. By establishing the one-dimensional non-linear mathematical model for heat conduction of the PCM energy-storing wallboard and according to the “effective heat capacity method”, simulation and calculation were made using the software MATLAB to analyze and solve the heat transfer problem of the PCM room. Meanwhile, the property can be found that the heat storing/releasing ability of the new PCM is significantly higher than that of ordinary materials by the experiment-based method. The result indicates that applying proper PCM to the inner surface of the north wall in the ordinary room can not only enhance the indoor thermal-comfort dramatically, but also increase the utilization rate of the solar radiation. So the heating energy consuming is decreased and the goal of saving energy has been achieved. If the parameters of the PCM is given as follows: the phase change temperature is set at 23
°C, the thickness is set at 30
mm, the phase change enthalpy is set at 60
kJ/kg, and the heating temperature is set at 20
°C, the energy-saving rate of heating season
η can get to 17% or higher. So the energy is effectively used and saved obviously.