Experimental Investigation Of Energy Storage Radiator With Low Temperature Phase Change Materials

With the development of social economy and the improvement of people’s livelihood, thegrowth of the traditional energy consumption, results in serious pollution of the global climatechange and environmental problems. In the century, the use of renewable energy is more andmore attention, especially solar energy. At present, solar energy utilization mainly concentratedin the photovoltaic and thermal utilization. Photovoltaic efficiency is low, the manufacturingprocess is the secondary pollution of the environment. While the efficiency of solar thermalutilization is higher, exists the restriction of the discontinuity and instability. However, largecapacity, high efficiency phase change energy storage technology can effectively overcomethese shortcomings. Due to the advantages of the controllable temperature range, constantphase transition process, large energy storage density, easy to control, and stable performance,phase change energy storage technology has been widely used. Phase change paraffin as aphase change energy storage material, exists the advantages of high phase change thermalstorage, good chemical stability, no phase separation and the low price, so this article useparaffin as phase change energy storage material.This topic used phase change energy storage radiator for independent design andmanufacture, this phase change energy storage radiator consists of six heat storage unit andinsulation cavity and heat transport pipelines. This paper researched the PCM in the phasechange energy storage radiator under the condition of constant heat source temperature, theinfluence factors of energy storage and thermal performance, maps the heat and cooling curvesof PCM(Phase Change Materials) in the different heat source temperatures and calculates thecorresponding thermal storage and heat dissipation rate. Firstly, this paper tests the phasechange paraffin material thermal physical property parameters by differential scanningcalorimetry (DSC). Secondly, in a given heat source temperature (60℃,65℃,70℃,75℃,80℃,85℃) and a given power rating (rate move at a rate of165W power pump), itconducts the experimental study of heat store, heat dissipation. Finally the corresponding heat source temperature storage heat and cooling rate are calculated. The experimental resultsindicate that, in the process of thermal storage, the higher the heat source temperature, thefaster the heat accumulation rate. In the process of heat dissipation, the greater air inlet cross-sectional area opening rate, the faster the cooling rate. Heat storage process of PCM can bedivided into three stages of solid phase sensible heat storage heat, latent heat of fusion heat andliquid sensible heat storage reservoir. In the process of temperature rise, temperature range ofPCM in phase change energy storage radiator is inconsistent, in the process of solid phasesensible heat, the upper material temperature rise rate is greater than the middle and lowermaterials. In the process of heat dissipation, temperature range of PCM in phase change energystorage radiator overall basic consistent.