摘要
相变材料(phase change materials,PCM)与建筑围护结构相结合,可以有效利用间歇性可再生能源不均匀分布的特点,在温度变化较小的情况下吸收大量的热量,减小室温的波动。将微胶囊相变材料加入到腻子粉中制备复合相变涂料,利用扫描电子显微镜(scanning electron microscopy,SEM)、差示扫描量热仪(differential scanning calorimetry,DSC)和热重分析仪(thermogravimetric,TG)对其微观形貌、相变特性和热稳定性进行表征。将复合相变涂料应用于水泥板内表面,研究微胶囊相变材料(microcapsule phase change material,MPCM)含量对复合相变涂层蓄热调温性能的影响。结果表明:复合相变涂层的温度变化速率比普通涂层慢,随着微胶囊相变材料含量的增加,复合相变涂层与普通涂层的表面温差呈递增趋势。复合相变涂层能明显降低峰值温度和温度的波动范围,起到调节室温的作用。微胶囊相变材料含量从0增加到30%,复合相变涂层与普通涂层的温差逐渐增大,最大为3.2℃。与普通涂层相比,随着微胶囊相变材料含量的增加,复合相变涂层室内温度保持24~28℃的时间逐渐增加,微胶囊相变材料含量为30%的复合相变涂层室内温度保持24~28℃的时间比普通涂层延长23.5 min。
Phase change materials(PCM),combined with the building envelope,can effectively take advantage of the uneven distribution of intermittent renewable energy,absorbing large amounts of heat with small temperature changes,reducing room temperature fluctuations.The composite phase change coating was prepared by adding microcapsule phase change material into putty powder.Scanning electron microscopy(SEM),differential scanning calorimetry(DSC)and thermogravimetric analyzer(TG)were used to characterize its microscopic morphology,phase change characteristics and thermal stability.The effect of the content of microcapsule phase change material(MPCM)on the heat storage and temperature control performance of the composite phase change coating was studied.The results show that the temperature change rate of the composite phase change coatings is slower than that of the ordindry coatings,and the surface temperature difference between the composite phase change coatings and the ordinary coatings increases with the increase of the content of the microcapsule phase change material.The composite phase change coating can obviously reduce the peak temperature and the fluctuation range of temperature,and can regulate the room temperature.The temperature difference between the composite phase change coatings and the ordinary coatings increases gradually,and the maximum value is 3.2℃.Compared with the ordinary coatings,with the increase of the content of microcapsule phase change material,the time of the composite phase change coatings indoor temperature holding 24~28℃gradually increases,and the time of the composite phase change coatings containing 30%microcapsule phase change material holding 24~28℃is 23.5 min longer than that of the ordinary coatings.
作者
于文艳
殷凯
YU Wen-yan;YIN Kai(School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)
出处
《科学技术与工程》
北大核心
2023年第31期13492-13498,共7页
Science Technology and Engineering
关键词
微胶囊相变材料(MPCM)
复合相变涂料
相变调温性能
蓄放热特性
microencapsulated phase-change material(MPCM)
composite phase change coatings
phase change temperature regulation performance
heat storage and release characteristic
