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An Application of Phase Change Technology in a Greenhouse
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This research paper focuses on the greenhouse that needs additional heat at night to insure an inside air temperature above 20?, and applies a new type of shape-stabilized phase change material (PCM) composite wallboard to the inner surface of the north wall of the greenhouse. Through establishing the model of phase change greenhouse basing on the theory of phase change heat transfer, we research the influence of solar radiation and environment temperature on the heat transfer process in the greenhouse. We optimize the phase change temperature and enthalpy of PCM, and research the energy-saving characteristics of the greenhouses that adopt PCM wallboards during the winter season. The results show that when the phase change temperature of PCM is 26?, the enthalpy is 60kJ/kg and the mix ratio is 40%. The energy conservation rate of the greenhouse can reach 20% during the winter.
Liu, Y.; Chen, C.; Guo, H.; Yue, H. (2006). An Application of Phase Change Technology in a Greenhouse. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from