基于CFD的低温送风冷辐射吊顶空调系统设计研究  

Research on Air Conditioning System of Ceiling Radiant Cooling Combined with Low Temperature Air Supply Based on CFD Simulation

作　　者：冯劲梅 唐斐骁 朱倩翎 Feng Jinmei;Tang Feixiao;Zhu Qianling(College of Urban Construction and Safety,Engineering Shanghai Institute of Technology,Shanghai 201418,China)

机构地区：[1]上海应用技术大学城市建设与安全工程学院,上海201418

出　　处：《流体机械》2020年第8期71-77,共7页Fluid Machinery

摘　　要：低温送风冷辐射吊顶技术在解决冷辐射吊顶易结露、新风不足和供冷能力有限等问题的同时可以实现建筑节能。本文以上海某办公室作为研究对象,建立三维数值模型,采用CFD软件FLUENT 2019 R1对办公室内的温度分布和空气流场进行数值模拟计算,分析低温送风角度对辐射供冷房间的热舒适性影响,模拟11℃和13℃的低温送风温度下,30°、45°、60°和75°4种不同顶送风角度的室内温度场、速度场情况,同时对部分工况模拟结果进行试验验证,并根据试验结果进行有效风感温度(EDT)和空气分布特性指标(ADPI)的热舒适性计算。试验数据与模拟结果相符,模拟结果真实可靠。数值计算及试验论证表明,送风温度为13℃时,送风角度为75°时,低温送风冷辐射吊顶的室内热舒适性最佳。Low temperature air supply technology can solve the problems of the risk of condensation on radiant ceiling,lack of fresh air,limited cooling capacity and so on,and achieve building energy efficiency at the same time.In present study,an office in Shanghai was taken as the object of study and a three-dimensional numerical model was established.Computational Fluid Dynamics(CFD)FLUENT 2019 R1 was used to simulate temperature distribution and air flow field of the office,and to analyze the influence of the angle of cold air to radiation cooling room.When the cold air system was under the temperature 11℃and 13℃,the temperature distribution and air flow field with four different top air supply angles of 30°,45°,60°and 75°were simulated.Experiments were carried out to verify the simulation results of some working conditions and the thermal comfort indices of EDT and ADPI were calculated based on the experimental results.The experimental data is consistent with the simulation and the simulation are real and reliable.The numerical calculation and experimental demonstration show that the thermal comfort was best when the temperature was 13℃and the angle of air supply was 75°.

关 键 词：冷辐射吊顶 低温送风 热舒适 送风角度 CFD 

分 类 号：TH12[机械工程—机械设计及理论]