蓄能型太阳能热泵用复合相变材料热性能分析

发布时间：2018-12-20 21:11

【摘要】：为了满足蓄能型太阳能热泵系统在不同季节太阳辐射强度下的储能需求,该文提出一种分季节蓄能型复合相变材料,可实现对太阳能的最大化利用。根据前期研究基础,以48#石蜡、62#石蜡和癸酸(capric acid,CA)配制了48/62和CA/62两种复合相变材料,对不同配比时复合材料的热性能分别进行了DSC试验和蓄热性能试验研究,结果表明不同配比复合材料的潜热和最高吸热峰对应温度均随着62#石蜡含量的增加呈现增大的趋势;复合相变材料的蓄热过程均分为固态显热蓄热、相变蓄热、液态显热蓄热3个阶段;CA/62复合相变材料DSC(differential scanning calorimeter)曲线出现了明显的2个固-液相变峰,其蓄热曲线中相变蓄热过程又分成2段,分别对应癸酸和62#石蜡的固-液相变过程。因此CA/62复合相变材料可用于蓄能型太阳能热泵系统实现分季节蓄能。
[Abstract]:In order to meet the energy storage requirement of solar energy storage heat pump system with solar radiation intensity in different seasons, a composite phase change material with seasonal energy storage is proposed in this paper, which can maximize the utilization of solar energy. On the basis of previous studies, 48 / 62 and CA/62 composite phase change materials were prepared from 48# paraffin, 62# paraffin and capric acid,CA. The thermal properties of composites with different ratios were studied by DSC test and heat storage test respectively. The results showed that the latent heat and the corresponding temperature of the highest endothermic peak increased with the increase of paraffin content in 62#. The heat storage process of composite phase change materials is divided into three stages: solid sensible heat storage, phase change heat storage and liquid heat storage. There are two obvious solid-liquid phase change peaks in the DSC (differential scanning calorimeter) curve of CA/62 composite phase change material. The phase change and heat storage process in the thermal storage curve is divided into two stages, corresponding to the solid-liquid phase change process of sebacic acid and 62# paraffin, respectively. Therefore, CA/62 composite phase change material can be used to realize seasonal energy storage in solar energy storage heat pump system.
【作者单位】：江苏省能源系统过程转化与减排技术工程实验室南京师范大学能源与机械工程学院;中国科学技术大学热科学和能源工程系;
【基金】：江苏省自然科学基金面上研究项目(BK20151549) 江苏省太阳能技术重点实验室开放基金(JPKLSST201503)
【分类号】：TB34;TK513

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