Heat Exchanger Integral Model and Flow Field in Heat Exchanger of Biomass Hot Blast Stove

In this paper,based on experimental study on the heat exchanger of a biomass hot blast stove,according to its characteristics,the corresponding three-dimensional model is set up.Based on the distributed resistance and the porous medium model,the standard k-e turbulence model and wall standard function and SIMPLE algorithm,the N-S equation and energy equations are solved,and the flue gas flow in heat exchanger tube and the air flow in heat exchanger shell side in heat transfer process are simulated.The temperature field,velocity field and particle trace diagram of the fluid in the shell at different velocity are obtained.The correctness of the analysis model is verified by an experiment.The key factors influencing the heat exchanger and flow field are discussed.This study provides a valuable reference for the design,optimization and application of the heat exchanger.