中南大学学报（自然科学版）2024，Vol.55Issue(3)：1168-1177,10.DOI:10.11817/j.issn.1672-7207.2024.03.028
基于纳米复合PCM集蓄热构件的建筑太阳能供暖特性研究
Study on heating characteristics of building based on nano-composite PCM solar collection and storage components
摘要
Abstract
A modular solar collection and storage component based on absorbable nanocomposite phase change material(PCM)was designed and applied to building solar heating systems to reduce building energy consumption.The preparation and physical property tests of graphene-paraffin composite PCM were carried out,the PCM solar storage mathematical model was established,and the numerical simulation of heating characteristics was carried out in combination with typical climatic conditions.The effect of heat storage layer thickness and air flow channel width on heating characteristics under constant air volume condition was studied.The influence of ventilation speed on air supply temperature,daily heat supply and solar heating guarantee rate was analyzed.The results show that the heat collection efficiency of the nanocomposite PCM added with graphene increases by about 60%compared to that of the pure paraffin wax.For a solar thermal storage component with a lighting area of 18 m2,when the ventilation speed is 1.0 m/s,the solar thermal storage wall exhibits excellent heating performance.At this time,daily heat supply for indoor use,average daily heat efficiency,and heating guarantee rate are 112.5 MJ,67.6%and 90.0%,respectively.The duration of indoor temperature reaching the set temperature of 20℃is 13 h.关键词
吸光型PCM/模块化集蓄热构件/供暖/通风速度Key words
light-absorbing PCM/modular solar collection and storage components/heating/ventilation speed分类
能源科技引用本文复制引用
严婷,徐国英,王岚,陈龙,余佳恒..基于纳米复合PCM集蓄热构件的建筑太阳能供暖特性研究[J].中南大学学报（自然科学版）,2024,55(3):1168-1177,10.基金项目
国家重点研发计划项目(2022YFE0208600) （2022YFE0208600）
国家自然科学基金资助项目(52276179)(Project(2022YFE0208600)supported by the National Key R&D Program of China （52276179）
Project(52276179)supported by the National Natural Science Foundation of China) （52276179）
