Additional Heat Capacity Treatment Method and Heat Capacity Impact Analysis for Transient Heat Transfer of Circular Tube
The additional components of the tube make it difficult to accurately describe the tran-sient flow and heat transfer of the internal fluid using a one-dimensional model.Therefore,this paper proposes to equate them to components with different temperatures than the tube,and treat the heat transfer between the additional components and the tube using the lumped parameter method.This paper conducts experimental research on the transient heat transfer characteristics of circular tube under temperature step and cosine change conditions,and calculates the outlet tem-perature response using the additional heat capacity method.The results show that the additional heat capacity method can significantly improve the calculation accuracy,and the average relative error between the simulation results and experimental data under various conditions does not exceed 2％.Meanwhile,this paper defines the average hysteresis time to quantify the impact of solid heat capacity on fluid temperature changes.
NETL
NSTL
万方数据
维普
