考虑热效应的地下建筑光导通风一体化系统自然通风特性研究  

Study on Natural Ventilation Characteristics of Integrated Optical Ventilation System for Underground Buildings Considering Thermal Effect

作　　者：罗慧琳 曹晓玲[1] 周旭 Luo Huilin;Cao Xiaoing;Zhou Xu(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,610031)

机构地区：[1]西南交通大学机械工程学院,成都610031

出　　处：《制冷与空调（四川）》2024年第6期768-775,共8页Refrigeration and Air Conditioning

基　　金：四川省科技计划项目(2021YFG0271)。

摘　　要：光导照明通风一体化系统将天然采光与自然通风相结合,可以有效降低地下建筑的照明与通风能耗。针对以往的优化设计通常忽略光导管热效应的情况,建立了热效应和室内热源耦合作用下的光导照明通风一体化模型,对其作用下自然通风特性进行了分析。研究结果表明:光导管管壁因太阳辐射引起的热流密度分布十分不均匀,沿圆周方向热流密度呈对称分布最高可达227W/m^(2)。热效应强化了光导照明通风一体化系统的自然通风效果,当考虑热效应时,自然通风量最高增加了17.9%,通道出口处空气平均流速提升了56%。在此基础上研究了太阳辐射强度对系统自然通风性能的影响,结果表明,随着太阳辐射强度从200W/m^(2)增至1000W/m^(2),光导管热效应增强通道内的空气流量由187m^(3)/h增加至202m^(3)/h。The integrated lighting and ventilation system combines natural lighting and natural ventilation,which can effectively reduce the lighting and ventilation energy consumption of underground buildings.In view of the fact that the thermal effect of light guide tube is usually ignored in previous optimal design,the integrated model of light guide lighting ventilation under the coupling of thermal effect and indoor heat source is established,and the characteristics of natural ventilation under its action are analyzed.The results show that the heat flux distribution caused by solar radiation on the tube wall is very uneven,and the heat flux distribution along the circumference is symmetrical up to 227W/m^(2).The thermal effect enhances the natural ventilation effect of the integrated system of lighting and ventilation.When the thermal effect is taken into account,the natural ventilation volume increases by up to 17.9%,and the average air velocity at the outlet of the channel increases by 56%.On this basis,the effect of solar radiation intensity on the natural ventilation performance of the system is studied.The results show that with the solar radiation intensity increasing from 200W/m^(2) to 1000W/m^(2),the thermal effect of the light pipe is enhanced,and the air flow in the channel increases from 187m^(3)/h to 202m^(3)/h.

关 键 词：光导通风一体化系统 热效应 自然通风 

分 类 号：TU929[建筑科学—建筑设计及理论]