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In this paper, the phase change plate is made of the organic phase change material (PCM) with the phase change temperature of about 30°C. The PCM is installed in the capillary natural convection radiator with the water supply temperature of 30–60°C. A low-temperature natural convection radiator with heat storage function is formed. The mathematic model is established by enthalpy method and solved by line-by-line iteration method. The applicability and economy of the equipment in Shanghai area are calculated. Taking the time ratio and average temperature of the target domain as the limiting parameters, the operation schemes suitable for three representative days are determined, and the optimum thickness of the phase change plate is 0.05 m for use in Shanghai. The regenerative low-temperature heating radiator provides a new idea for the application of PCMs in the field of low-temperature heating. The conclusions obtained provide a basis for further research and application of the equipment.

Energy conservation analysis of regenerative radiator for low-temperature heating