Abstract Energy flexible building is promising for the penetration of renewable energy, and electric heating floor with built-in ventilation duct is one important form. However, the thermal and energy performance of such thermal active system is still unclear, which makes it necessary to develop a reliable thermal model of such system. In this research, a scale experimental system was established to test the space heating performance and energy consumption characteristics of four ventilated mortar blocks under different operational modes, and three blocks were integrated with different distributions of micro-encapsulated phase change material (PCM). An analysis was conducted of the critical parameters including the surface temperature of mortar block, the average temperature of space air, the temperature of black globe and the power consumption. It was found out that when PCM was concentrated on the upper part, and ventilation started at the same time as heating, the heating power consumption was increased by up to 41.5% compared to the heating without ventilation. For a further predictive control, a simplified state space model was also established and validated by the experimental data. Additionally, the impact of some geometrical and operational parameters was also analysed based on the model, including the thickness of mortar block, the air speed and the diameter of tube. It was demonstrated that the thickness of block had the most significant impact on the surface temperature of mortar block, ventilation rate had a considerable impact on the thermal responsiveness of indoor air, and tube diameter had a comprehensive impact on the thermal performance of block and space air.

中文翻译：

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新型相变材料地暖通风砂浆砌块采暖性能研究

摘要 能源柔性建筑有利于可再生能源的渗透，内置通风管道的电加热地板是一种重要形式。然而，这种热活性系统的热能和能量性能仍不清楚，因此有必要开发这种系统的可靠热模型。本研究建立了规模实验系统，测试了四种通风砂浆砌块在不同操作模式下的空间供暖性能和能耗特性，并结合了三种不同分布的微胶囊相变材料（PCM）。对砂浆砌块表面温度、空间空气平均温度、黑球温度和功耗等关键参数进行了分析。发现当PCM集中在上部，在加热的同时开始通风时，与不通风的加热相比，加热功率消耗增加了41.5％。为了进一步的预测控制，还建立了一个简化的状态空间模型，并通过实验数据进行了验证。此外，还基于模型分析了一些几何参数和操作参数的影响，包括砂浆块的厚度、风速和管径。结果表明，砌块厚度对砂浆砌块表面温度的影响最为显着，通风量对室内空气的热响应性影响较大，管径对砌块和空间的热性能有综合影响。空气。