Numerical Simulation Of The Heat Transfer Process Of The Adsorbent Bed In The Solid Adsorption System

Adsorption refrigeration system is a kind of environmentally friendly refrigeration system, which can be driven directly by low grade energy such as solar energy and industrial waste heat. In recent years, adsorption refrigeration technology has been well studied on many aspects. It has a lot of advantage, such as simple structure, no moving element, no noise and good shock resistance etc. It has a broad prospect of application and value.The adsorbent bed is the key component in the adsorption refrigeration system. It is filled with the adsorbent. The refrigerant flows in the absorbent and can generate phase change. This is a considerably complex problem. At present, mostly the program which is edited by oneself is used to calculate the heat transfer process of the adsorbent bed. The versatility is not good and is not convenient to the optimum design of the adsorbent bed. This article is the first time that used FLUENT to simulate the temperature of adsorbent bed. At first, the adsorbent bed which had a heat transfer tube was simulated. And then the whole adsorbent bed was simulated. The main work and conclusions in the paper are as follows:1. UDF was used. C program was complied and was loaded in FLUNENT in order to consider that the phase change has effect on the temperature of the adsorbent bed. Because there is the phase change of the refrigerant in the process of desorption. It expanded the model of the phase change in FLUENT.2. The distribution of the temperature field and the temperature change of every point in the adsorbent bed can be got by simulation. And the relationship between the temperature field and each parameter was analyzed. The results of simulation are found that the coefficient of heat conductivity, the density and the specific heat of the adsorbent have important effect on the temperature of the adsorbent bed, that the flow rate, the temperature of the heat transfer fluid and the initial temperature of the adsorbent bed have little effect on the temperature of bed, but they have effect on the efficiency of heat exchange and the rate of heat transfer, and that the bed temperature distribution of different radial direction points is different and that of different axial...