摘要
本研究以废弃红枣的冻干红枣粉(FDJ)作为相变材料载体,采用真空浸渍法从相变芯材料中吸附石蜡,研究材料的储热能力和热响应效率,并采用聚乙烯醇(PVA)水溶液降低材料的泄漏值。结果表明,聚乙烯醇冻干枣粉石蜡复合相变材料(PVA CFDJ)的相变焓达到126.41 J g,导热系数增加到0.2163 W m·K,较纯石蜡导热系数提高了60.5%。在储放热循环测试中,循环100次,PVA CFDJ材料的焓值仅仅减少了4%左右,泄漏率降低至3.2%。PVA CFDJ复合材料在具有较高地相变焓的同时还具有高导热性、低泄漏率等特性,该复合材料不仅提高了地域特色的生物质材料的附加值,更为新型建筑储能材料提供了新思路。
In this study,the freeze-dried powder(FDJ)of waste jujube was used as a carrier for phase change materials.The vacuum impregnation method was used to adsorb paraffin from phase change core materials,and the thermal storage capacity and thermal response efficiency of the materials were studied.Polyvinyl alcohol aqueous solution was used to reduce the leakage value of the materials.The results showed that the phase transition enthalpy of polyvinyl alcohol jujube carbon paraffin carbon composite phase change material(PVA CFDJ)was 126.41 J g,and the thermal conductivity was 0.2163 W m·k,which is 60.5%higher than that of pure paraffin.In the storage-discharge heat cycle test,the enthalpy value of the PVA CFDJ material was only reduced by about 4%after 100 cycles,and the leakage rate was reduced to 3.2%.The PVA CFDJ composite has the characteristics of high phase transition enthalpy,high thermal conductivity and low leakage rate,which not only improve the added value of biomass materials with regional characteristics,but also provide new ideas for novel building energy storage materials.
作者
时春辉
陆淑芬
胡立兵
陈浩东
吕喜风
SHI Chunhui;LU Shufen;HU Libin;CHEN Haodong;LYU Xifeng(College of Chemistry and Chemical Engineering,Tarim University,Alar,Xinjiang 843300;Ecological Environment Monitoring Station of the First Division of Xinjiang Production and Construction Corps,Alar,Xinjiang 843300)
出处
《塔里木大学学报》
2024年第2期40-46,共7页
Journal of Tarim University
基金
塔里木大学校长基金硕士项目(TDZKSS202126)
有机无机复合材料国家重点实验室开放课题项目(202001011)。
关键词
冻干枣粉
石蜡
相变材料
freeze-dried jujube powder
paraffin
phase change material
