十水合碳酸钠/十二水合磷酸氢二钠不同夹层复合相变墙体的热响应特性  

Thermal response characteristics of composite phase change walls with different sandwich layers of sodium carbonate decahydrate/sodium hydrogen phosphate

作　　者：惠文贤 张志伟 肖鑫 潘苏凯 孙涛 吴启迪 王云峰 HUI Wenxian;ZHANG Zhiwei;XIAO Xin;PAN Sukai;SUN Tao;WU Qidi;WANG Yunfeng(College of Environmental Science and Engineering/Institute of Air Environment and Building Energy Conservation,Donghua University,Shanghai 201620,China;Yunnan Provincial Rural Energy Engineering Key Laboratory,Kunming 650550,China)

机构地区：[1]东华大学环境学院/空气环境与建筑节能研究所,上海201620 [2]云南省农村能源工程重点实验室,昆明650500

出　　处：《西安工程大学学报》2024年第5期86-92,共7页Journal of Xi’an Polytechnic University

基　　金：云南省农村能源工程重点实验室开放基金重点项目(2022KF001);中央高校基本科研业务费专项基金(2232021D-11)。

摘　　要：为了探究相变材料对墙体的热性能改善效果,通过共熔法制备35%十水合碳酸钠/52.5%十二水合磷酸氢二钠/5%氮化硼纳米颗粒/7.5%膨胀石墨复合相变材料,将其制成块状放置在石膏板的不同位置,构成可用于调节室内热舒适的相变墙体。对墙体在距离不同温度热源照射下、不同位置时的温度热响应特性进行研究,并对CO_(2)排放减少量进行评估。结果表明:随着加热距离的增加和热源温度的降低,室内的升温速率均逐渐减小,热舒适时长相应增加;当加热距离为30 cm、加热温度为37℃时,室内侧夹层相变石膏板的热舒适时长达到1980 s,比室外侧夹层相变石膏板多20 s,并且在2371 d回收周期内,可减少379.36 kg的CO_(2)排放。因此,在较远的加热距离和较低的热源温度下,室内侧夹层相变石膏板更有利于延缓室温的上升速率和碳排放的减少。In order to explore the improvement of thermal properties of phase change materials on wall,35%Na_(2)CO_(3)·10H_(2) O/52.5%Na_(2)HPO_(4)·12H_(2)O/5%boron nitride nanoparticles/7.5%expanded graphite composite phase change materials were prepared by eutectual method,which were made into blocks and placed in different positions of gypsum board.A phase change wall which could be used to adjust indoor thermal comfort was constructed.The thermal response characteristics of the wall at different locations or at different temperatures of heat source were experimentally studied,and the reduction of CO_(2)emission was evaluated.The results show that with the increase of heating distance and the decrease of heat source temperature,the indoor heating rate gradually decreases,and the duartion of thermal comfort duration increases.With the heating distance of 30 cm and heating temperature of 37℃,the duration of thermal comfort of sandwiched phase change gypsum boards at interior side reaches 1980 s,which is 20 s longer than that of sandwiched phase change gypsum boards at exterior side.The CO_(2)emission can be reduced by 379.36 kg within the recylic time of 2371 days.Therefore,when the heating distance is longer and the heat source temperature is lower,the sandwiched phase change gypsum boards at interior side is more conducive to delaying the rising rate of the room temperature and reducing CO_(2)emission.

关 键 词：复合相变材料 相变夹层 热舒适时长 热源距离 升温速率 

分 类 号：TU023[建筑科学] TK02[动力工程及工程热物理]