Research On The End Of Small Storage Air Conditioning System Heat Transfer

Storage air conditioning is currently one of the economic and effective ways to peaking load. In view of the electric power policies, such as time-sharing electricity price, etc, it provides the opportunities for development of storage air conditioning. The end heat transfer of ice storage air condition is researched in this article. The heat transfer characteristics of the latent heat transport storage medium- ice slurry direct melting in the air side of different type of tube fin heat exchangers is mainly discussed.In view of the ice slurry directly flow in the tube-fin heat exchanger for melting and cooling conditions, the model of air side fluid flow and heat transfer is established, a three-dimensional numerical simulation research on the plate fin-tube heat exchanger, the corrugated fin-tube heat exchanger and the louvered fin-tube heat exchanger with the software of FLUENT was conducted. The influence of ice content, pipe diameter, ice particle diameter and other parameters on the heat transfer of the ice slurry side also was considered in the calculation; and based on the third kind boundary condition; the heat transfer and flow of heat exchanger air side were studied. The results show that the heat transfer effect of corrugated fin is stronger than the louvered fin, but considering the effect of resistance loss, the comprehensive performance of louvered fin-tube heat exchanger is better.The method of uniform design and regression analysis was used for analyzes the influence factor on the flow and heat transfer of corrugated fin-tube heat exchanger, for example the wind speed, angle, length of window. The air side resistance loss of louvered fin-tube heat exchanger, temperature difference between inlet and outlet increases with angle of window; the air side resistance loss of louvered fin-tube heat exchanger increases with length of window, but the temperature difference between inlet and outlet is not obvious. Through double sieving stepwise regression analysis, it is obtained that angle of window is the main influence factor for the air side resistance loss of louvered fin-tube heat exchanger. The heat transfer characteristics were affected by length of window, but it is not significant.