置换通风系统送风设计参数的确定  

Confirmation of Displacement Ventilation System Design Sending-Wind Parameters

作　　者：穆振英[1] 刁乃仁[2] 由世俊[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072 [2]山东建筑大学热能工程学院,济南250101

出　　处：《天津大学学报》2010年第12期1123-1130,共8页Journal of Tianjin University(Science and Technology)

基　　金：国家科技支撑计划资助项目(2006BAJ04A15)

摘　　要：针对目前我国指导置换通风实际工程设计的具体规范标准相对缺乏、详细的工程设计参考数据不足这一问题,进行了理论与实验研究.建立了理论计算模型,利用所建模型对置换通风系统进行了数值模拟,通过实验验证了模拟结果的准确性,证明所建模型是正确的,可以作为后续分析的基础.确定了能够反映置换通风特点的几个参数指标,包括热力分层高度、通风效率、房间垂直温度梯度、工作区温度和工作区风速等.为了方便工程应用,定义了热源热指标的概念.根据热源热指标设计了研究工况,利用数值模拟方法重点研究了热源参数和送风参数对室内空气环境舒适性的影响,得出了热源参数和送风参数的设计取值范围,并对热源分散性的影响提出了设计参数的修正方法.所得结论可供置换通风系统设计及应用校核参考.For lack of codes and particular parameters of displacement ventilation design in China now, theoretical and experimental research has been conducted in the paper. Theoretical calculation model was first established and verified through experiment. Using the model, numerical simulation was carried out, and the results were used for follow-up analysis. Parameters reflecting the characteristics of displacement ventilation were determined, including thermal stratification height, ventilation efficiency, vertical temperature gradient, temperature and wind speed in working area. To facilitate engineering application, heat-source index was also defined, according to which the working conditions under study were set. The influences of heat-source parameters and sending-wind parameters on indoor air comfort were mainly studied. The reasonable design values of sending-wind and heat-source parameters were gained, and the correction method of reducing the impact of heat-source distribution was raised. The results can serve as a guide to the design and verification of the displacement ventilation system.

关 键 词：置换通风 送风参数 热源热指标 

分 类 号：TU831.8[建筑科学—供热、供燃气、通风及空调工程]