全年工况下双层相变墙体的传热性能分析  

Annual Analysis of Indoor Thermal Environment of a Double-layer Phase Change Wall

作　　者：刘春蕾 戴秋敏[1] LIU Chun-lei;DAI Qiu-min(School of Energy and Power Engineering,Nanjing University of Science and Technology)

机构地区：[1]南京理工大学能源与动力工程学院

出　　处：《建筑热能通风空调》2019年第12期18-21,共4页Building Energy & Environment

摘　　要：基于ANSYS的热焓法模型,模拟了全年工况下双层相变墙体的传热过程。重点比较了全年工况下相变温度对室内热流峰谷衰减和室内壁面温度的影响,特别是对过渡季节的影响,确定了相变层的最佳相变温度组合。研究结果表明:冬季室内侧相变温度为16~18℃的相变材料对热流的峰谷衰减延迟作用最明显,夏季室外侧相变温度为28~30℃的相变材料对热流峰谷的衰减延迟作用最明显,春秋季室内侧相变温度为18-20℃的相变墙体室内更舒适。全年最佳相变温度组合为室内侧相变温度为18~20℃,室外侧相变温度为28~30℃。Based on enthalpy method,the heat transfer of a double-layer phase change wall in a whole-year is simulated.The effects of phase change temperatures on heat flux peak-valley decay rate of inner wall and inner surface temperature during the whole year are compared,as well as the impacts on the transitional season.The optimal phase change temperature combination of the phase change layer is determined.The results show that the inner phase change materials with phase change temperature of 16-18 in winter has the largest decay rates on the peak-valley of heat flux.In summer,the outer phase change materials with phase change temperature of 28~30℃is the best choice.In spring and autumn,the interior wall with phase change temperature of 18~20℃is the most comfortable.The optimum phase change temperature combination is that the phase change temperature of the inner side is 16-18℃,and the phase change temperature of outer side is 28~30℃.

关 键 词：全年工况 双层相变 最佳相变温度 

分 类 号：TU111.4[建筑科学—建筑理论]