低温辐射供暖复合相变墙体热性能分析  

Analyses of thermal behavior of composite wallboards containing phase change materials (PCM) for low-temperature hot water based radiant spacing heating system

作　　者：郭茶秀[1] 蔡宏伟[2] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001 [2]南昌大学资源环境与化工学院,江西南昌330029

出　　处：《储能科学与技术》2016年第4期539-544,共6页Energy Storage Science and Technology

基　　金：国家自然科学基金(51176173);河南省科技攻关计划(162102210001);河南省教育厅科学技术研究重点项目科技攻关(14A480002)

摘　　要：低温热水墙体辐射供暖技术因其节能、舒适及对供暖温度(热源品位)要求低等优势而越来越得到广泛应用。在研究相变墙体辐射供暖系统的基础上,针对相变墙体层蓄热效率低的问题,提出采用一种新的复合相变墙体板。并建立相应复合相变墙体的传热模型,利用数值模拟软件对复合相变墙体的蓄放热过程进行分析,对比分析了有复合相变层和没有相变层时室内供暖系统的区别,同时研究了相变温度、相变层厚度等参数对复合相变墙体表面平均温度、表面热流密度的影响,得到了它们对复合相变墙体的传热过程的影响规律。研究结果可为提高供暖系统的舒适度提供理论依据,并为发展低品位能源利用提供技术支持。Low-temperature hot water based radiant spacing heating systems are widely used to provide a comfortable environment due to low heating temperature requirements and high energy efficiency. We propose the introduction of a PCM based wallboard radiant heating system with an aim to improve the efficiency of the system through the use of energy storage. A heat transfer model is set up for the composite PCM wallboards to study the storage and release processes of the materials with a CFD software package. The influence of the use of the composite PCM on the room environment is compared with that without the use PCM. The influences of phase change temperature, the thickness of composite PCM layer on the wallboard surface temperature and heat flux are studied.

关 键 词：低温辐射供暖 复合相变墙体 模拟分析 

分 类 号：TK512.4[动力工程及工程热物理—热能工程]