Experimental And Theoretical Studies On Thermal Performance Of Porous Media Salt Gradient Solar Pond

Salt gradient solar pond(SGSP)is a simple and inexpensive solar utilization equipment and could be used as collector din and the accumulator.Due to its thermal storage properties,solar pool has an important development potential in the aspect of heat utilization of solar.The temperature of heat source determines the quality of the heat source,thereby increasing the LCZ temperature of the solar pond has a very important significance.The following aspects were mainly studied in this paper:1 Temperature programmed experiments is used to analog salt gradient solar pond by setting the latitude and importing local sunlight intensity,and a salt gradient solar pond bench is built based on the proposed method.2 A series of salt gradient solar pond experiments are conducted by using the experimental device.The first group was the blank test comparison with processing porous media(cinder)experimental,and the results show that the porous medium salt gradient solar pond can get a higher temperature and the heat storage layer can effectively inhibit the salt gradient layer of salt diffusion phenomenon.Another research is conducted with composite porous dielectric layer of salt gradient solar pond of cinder and cobblestone.And the results shows that composite porous dielectric layer solar cell can increase the average temperature of the heat storage layer.Therefore,it can improve system availability and have important practical applications in the same situation3 A heat storage layer heat exergy model is established.And heat exergy of many situations will be analyzed with the experimental results of salt gradient solar pond temperature field simulation.Results show that the heat exergy is increased by adding cinder of porous medium in the same situation.