Research And Simulation Of Novel Solid Adsorption Cooling Tube And Its System

Adsorption refrigeration technology is a kind of environmentally friendly refrigeration system, which can be driven directly by high and low grade energy such as solar energy and industrial waste heat and which can be save the first energy and suit environmental protect. So it has been well studied on many aspects by home and overseas. Some scholars design the adsorption cooling tube using for heat pipe theory. It is an unattached subminiature refrigeration tube and has a lot of advantage, such as simple structure, no moving element no noise and good shock resistance etc. But undeniably, it has many problems, such as the low overall system efficiency, the adiabatic measure of the heat and cold end, the improper sealing measure, the difficulty of thermal dissipation etc. Therefor, solving those problems, we need carry through a lot of basic theory and experimentation from the structure and performance of the entire system and cooling tube itself.In the foundation of using for the former study, this paper is presented tow novel adsorption cooling tube, the floating-head adsorption cooling tube and the multichannel combined-type cooling tube. It is chosen the multi-channel combined-type cooling tube to design and analyze. It is presented the adsorption refrigeration system in the foundation of the chosen tube. The mathematics model, which was used for modularized modeling by the soft of Matlab/Simulink, was built for the cooling tube and the system.It is simulated the former cooling tube using the model of novel multi-channel combined-type cooling tube and compared with the data of the literature using the simulated results. It is found that the minimum evaporating temperature is higher 8.3% than the experimental results, refrigeration capacity and COP are higher 9.2% and 11.4% than experimental results respectively, SCP is higher 10.4%, COP reaches 0.3, SCP reaches 101.7W/kg. The precision is satisfied with the requirement. The model of the tube was proved to be correct. Then the performance of the novel cooling tube was analyzed and compared. The factors which effected the performance of the cooling tube, such as the beginning adsorptive capacity, the heat source temperature, the environmental temperature, the heat transfer coefficient of the heat source etc, were analyzed. The simulated results were provided with meanings greatly for the improvement of the structure and performance of the cooling tube.The refrigeration system making up of the cooling tube was simulated in the foundation of the mathematics model. By calculation of the system dynamic model, such curves as curve of adsorption temperature, condensing temperature, evaporating temperature vs time in one cycle, were obtained. According to calculation result, influences of some parameters, which include heat source temperature, condensing temperature, evaporating temperature, cycle time, conductivity and the maximum adsorptive capacity on performance of the system were discussed and the mechanism of the influences was analyzed.