Research Of Thermal Integration Technology And Design Method Of PCM-Room In Cold Areas

Energy storage technology can optimize the utilization of energy, so it becomes the hot research point at home and aboard. Under the huge trend of worldwide energy conservation and C-mission reduction, it seems quite important for the research of energy storage technology. This paper summarized the technologies used in phase change energy storage room and analyzes their advantages and disadvantages. Regarding to the singularity of PCES technology and focusing on the use of solar heating, this paper presented an idea of"thermal integration technology phase change energy storage room"and its specific program for cold areas from the point of optimal use of energy. Taking a small second-floor building as an example, the benefit of the program was analyzed.Regarding to such problem as heating deficiency in the period of heat-storing for PCES floor, this paper proposed a kind of new PCES floor system taking a double capillary network as heating end. With the help of finite element analysis software ANSYS and through reasonable simplification, this paper set up a three-dimensional heat transfer model and analyzed the characteristic of storing and releasing heat of the PCES floor.Based on the theoretical analysis, this paper established a kind of actual new PCES floor system. Capric acid was chosen as phase change material. Before establishing the experiment platform, the PCM was tested and two kinds of packaging method were tried. After that, the new PCES floor system was tested and analyzed. The characteristic of storing and releasing heat of the PCES floor and its influence on indoor thermal environment were gotten.In addition, a self-developed solar air collector was integrated into the south wall of the small building, which constituted a solar heating integrated experimental platform. This solar air heating system could not only assist the PCES floor system in winter but also provide night mechanical ventilation in summer. The effect of intermittent heating for the solar heating integrated system was tested and analyzed, which proved the feasibility of application of "phase change thermal energy storage room integration technology". The research provided a new way for solar heating, solving the peak and valley problem for electrical system, providing more comfortable living environment and achieving building energy efficiency.