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低温热水墙体辐射供暖技术因其节能、舒适及对供暖温度(热源品位)要求低等优势而越来越得到广泛应用。在研究相变墙体辐射供暖系统的基础上,针对相变墙体层蓄热效率低的问题,提出采用一种新的复合相变墙体板。并建立相应复合相变墙体的传热模型,利用数值模拟软件对复合相变墙体的蓄放热过程进行分析,对比分析了有复合相变层和没有相变层时室内供暖系统的区别,同时研究了相变温度、相变层厚度等参数对复合相变墙体表面平均温度、表面热流密度的影响,得到了它们对复合相变墙体的传热过程的影响规律。研究结果可为提高供暖系统的舒适度提供理论依据,并为发展低品位能源利用提供技术支持。
Low-temperature hot water wall radiation heating technology because of its energy-saving, comfort and heating temperature (heat source grade) low demand and more widely used. On the basis of studying the radiation heating system of phase change wall, aiming at the low heat storage efficiency of phase change wall, a new composite phase change wall plate is proposed. And the heat transfer model of the corresponding composite phase change wall was established. The heat storage and storage process of the composite phase change wall was analyzed by numerical simulation software, and the difference between the indoor heat exchange system with composite phase change layer and without phase change layer was analyzed. At the same time, the effects of phase transition temperature, thickness of phase change layer and other parameters on the average surface temperature and surface heat flux of the composite phase change wall were studied. Their influence on the heat transfer process of the composite phase change wall was obtained. The results can provide theoretical basis for improving the comfort of heating system and provide technical support for the development of low-grade energy utilization.