Study on convective heat transfer load by nozzle air supply in large spaces based on Block-Gebhart model

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.