Study On Performance Of Solar Energy Adsorption Refrigeration System Based On Enhanced Mass Transfer

The development and utilization of clean solar energy resources can effectively cope with global climate change, environmental pollution and adjust the economic structure and energy structure. Solar adsorption refrigeration has the advantages of simple structure, environmentally friendly, efficient use of low-grade heat source, etc. Its refrigeration technology accords with the requirements of sustainable development and has received more and more attention in modern refrigeration field.In many years of research, its research mostly concentrates in the material performance promotion of adsorption working pairs, the major component optimization the system and different ways of power supply to the system. But there are rarely any studies or attempt in mass transfer or under strengthen mass transfer mode of solar adsorption refrigeration system. In this paper, a solar adsorption refrigeration system based on strengthen mass transfer is proposed, established and its system performance is studied to solve this shortage. The main work is as follows:(1) Designed a set of solar adsorption refrigeration system experimental platform based on strengthen mass transfer composed of adsorbent bed, condenser, evaporator, Pipeline pump and so on. The match of all parts,build of the system and debugging of system running was completed. In this process, the pipeline pump selection, operation characteristics and installation etc. are analyzed especially.(2) With the basic mathematical model of solar adsorption refrigeration, correlation theories and the pipeline pump movement characteristic, the theory desorption quantity formula of the strengthen mass transfer refrigeration system was analyzed and obtained. This equation can provide some guidance and help to experimental performance analysis of the system for the follow-up.(3) The simulation photosource was established to provide radiant heat energy for the solar adsorption refrigeration system experimental platform. The photosource is composed of 10 quartz iodine tungsten lamp of 500 w. Its spectrum is closer to the solar spectrum, which can be more realistic simulated the sunlight.(4) In a simulated environment, experimental research and comparison analyses of the refrigeration performance under strengthen mass transfer mode and natural mass transfer mode were conducted in the system. In the experiment, the simulation photosource was uses to provide radiant heat energy for this adsorption refrigeration system, the city electricity was provided electrical energy to the pipeline pump, temporarily. The experimental results showed that, under the same radiation energy input, the refrigeration efficiency of strengthen mass transfer mode had a significantly improved than that of natural mass transfer mode, the maximum improve efficiency can reach to 58.0%; the refrigeration performance of the system under strengthen mass transfer mode was more stable, the energy utilization rate was more higher; in addition, under strengthen mass transfer mode, the inevitable issue of clearance refrigeration in natural mass transfer mode can also be solved.A new direction for the solar adsorption refrigeration optimization research was proposed in this paper. The refrigeration efficiency and performance improvement issues was mainly studied by strengthened mass transfer function to traditional solar adsorption refrigeration system. The research results can offer a kind of new mentality for design and optimization of solar adsorption refrigeration system.