摘要
【目的】集热墙作为太阳能建筑采暖的核心集热部件,其内流特征与热工性能直接影响着建筑在采暖季的能耗水平。【方法】本研究提出一种新型管式多风道太阳能集热墙结构,通过数值模拟的方法对其间层换热、多管换热、耦合换热三种模式下的内流特征进行研究。【结果】研究表明,当换热模式由间层换热切换到耦合换热时,出风口日平均温度可提升22.6℃;从耦合换热切换到多管换热时,出风口日平均温度可提升15.5℃。【结论】多风道的设置在增大流动阻力、减小出口流量的同时,均衡了整个流场区域的空气流动特性,集热管束的植入可有效提升集热墙出风口的温度,改善室内采暖效果。
[Purposes]As the core heat collection component of solar building heating,the heat collection performance and heat energy conversion efficiency of the collector wall directly affect the energy consumption level of the building in the heating season.[Methods]In this study,a new type of tubular multi-channel trombe wall structure was proposed.The internal flow characteristics of the three modes of interlayer heat transfer,multi-channel heat transfer,and coupled heat transfer were studied by numerical simulation methods.[Findings]Results shows that when the heat exchange mode was switched from interlayer heat exchange to coupled heat exchange,the daily average temperature of the air outlet can be increased by 22.6℃,and when the coupled heat exchange was switched to multi-channel heat exchange,the daily average temperature of the air outlet can be increased by 15.5℃.[Conclusions]Multi channel in Trombe wall increases the flow resistance and reduces the outlet flow,and balances the air flow characteristics of the entire flow field area.The implantation of heat-collecting tube bundles can effectively increase the temperature of the air outlet of the trombe wall and improve the indoor heating effect.
作者
李瑞鑫
吕高冲
侯浩宇
朱国梁
LI Ruixin;LV Gaochong;HOU Haoyu;ZHU Guoliang(Zhengzhou University,Zhengzhou 450001,China)
出处
《河南科技》
2023年第19期90-93,共4页
Henan Science and Technology
基金
国家自然科学基金项目(51808506)。
关键词
太阳能
管式集热墙
多风道
内流特征
耦合换热
solar energy
tubular trombe wall
multi-channel
internal flow characteristic
coupled heat transfer
作者简介
李瑞鑫(1985—),男,博士,副教授,研究方向:被动式太阳能技术;通信作者:侯浩宇(2002—),男,本科生,研究方向:建筑环境与能源应用。
