基于Block-Gebhart模型的大空间喷口送风对流热转移负荷研究
Study on convective heat transfer load by nozzle air supply in large spaces based on Block-Gebhart model
摘要：
利用Block-Gebhart模型，分析了大空间分层空调喷口送风下对流热转移负荷的形成机理，将室内空间在竖直方向划分为若干区域后，认为区域间气流流动换热与区域间温差换热是对流热转移负荷的主要构成部分，提出了喷口送风下对流热转移负荷的计算方法，并通过大空间缩尺模型实验验证了理论模型的准确性。利用量纲一对流热转移负荷、热强度比及排热比之间的变化规律进行变因素工况计算，拟合了多工况下的对流热转移负荷值，修正了对流热转移负荷线算图。
Abstract：
Using the Block-Gebhart model, analyses the formation mechanism of convective heat transfer load of large space stratified air conditioning with nozzle air supply. Dividing the indoor space into several regions in vertical direction, considers that the interregional air flow heat transfer and the interregional temperature difference heat transfer are the main components of convective heat transfer load. Puts forward the calculation method of convective heat transfer load under nozzle air supply, and verifies the accuracy of the theoretical model by large space scale model experiments. Carries out the variable factor condition calculation based on the variation law between dimensionless convective heat transfer load, heat intensity ratio and exhaust heat ratio, fits the convective heat transfer load under multiple working conditions, and modifies the line diagram of convective heat transfer load.
Keywords:convective heat transfer load, Block-Gebhart model, large space, stratified air conditioning, nozzle air supply, line diagram