Study on Temperature Change in the Solar Energy Storage Pile during Process of Heat Extraction

Abstract:

This paper first introduces the present situation of insufficient heat utilization ratio of solar energy in the underground concrete storage pile, and based on the existing equivalent model, stimulation analysis of heat transferring process is made on the factors affecting temperature field change under different heat extracting operation conditions. It is known that the temperature field change in heat storage pile is affected by different continuous & intermittent operation modes, heat flux, thermal conductivity, specific heat capacity and underground pipe space; and then optimal parameters are reasonable selected to reduce variation of soil temperature field and make full use of heat in concrete pile.