高大空间空气载能辐射末端热环境与传能研究  

Study on Thermal Environment and Energy Transfer on Air-borne Energy Radiant Terminal in Large Space

作　　者：韩婕 龚光彩[1] 杨厚伟[1] 刘佳[1] 

机构地区：[1]湖南大学,长沙410082

出　　处：《建筑科学》2017年第10期113-119,共7页Building Science

基　　金：国家自然科学基金项目"空气载能辐射空调优化与控制机理研究"(51378186);国家国际科技合作项目"中南地区可再生能源与绿色建筑关键技术合作研究"(2010DFB63830);国家科技支撑计划--韶山红色旅游区绿色宜居环境构建及智慧管理(No.2015BAJ03B00)

摘　　要：本文以内设空气载能辐射空调系统的某火车站候车厅为研究对象,利用FLUENT数值模拟的方法,分析研究了房间人体活动区域内空气工况参数和系统传能过程。模拟结果显示,该房间室内空气温湿度分布较均匀,未出现结露现象。且在传能过程中,系统总冷负荷约为119 KW,空气载能辐射空调系统承担92%的冷负荷;其中,辐射换热占房间总负荷64.2%,对流换热占29.1%,由此可得系统以辐射换热为主;相较于金属平板辐射空调系统,该系统新增的对流换热量包括载能空气与辐射孔板间的对流换热量以及循环流动的交换能量;经计算,在相同模拟条件下,该系统总换热量较金属平板辐射空调系统超出约10%以上。综上,该系统在理论上基本符合高大空间建筑夏季负荷大,强调舒适节能的要求。In this paper, FLUENT numerical simulation is used to study air parameters and energy transfer process of air conditioning area in a train station waiting hall equipped with air-borne energy radiant air-conditioning terminal system. Simulative results show that air temperature and humidity are evenly distributed without condensation. Furthermore, in the energy transfer process, total cooling load of the hall is about 119 KW, of which the air-borne energy radiant terminal system takes 92%. The radiant heat transfer accounts for 64.2% of the total load and the convective heat transfer accounts for 29. 1%. Therefore, the system is mainly composed of radiant heat transfer. In addition, compared with the metal flat radiant air-conditioning terminal system, the air-borne energy radiant terminal system has two additional parts of convective heat transfers. One part locates between the air-borne and the radiant orifice plate while the other part is the exchange energy caused by circulating flow. The total heat transfer capacity of the system is about 10% higher than the metal flat radiant air conditioning system under same simulation conditions. In summary, the system substantially meets the requirement for large space building with focus on comfort and energy saving.

关 键 词：遮高大空间 空气载能辐射空调末端系统 热环境 传能过程 数值模拟 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]