The Influences of Soil Properties on Temperature Field of Saline Aquifer

Abstract

The comprehensive application of thermal energy storage technology using superficial underground saline water has become the new direction for the development of groundwater source heat pump. The properties of saline aquifer are the key parameters to affect the energy utilization of groundwater source heat pump. Based on a couple numerical model of groundwater flow and heat transferring in the aquifer, and combined with a project for groundwater source heat pump system in Binhai New Area in Tianjin, a numerical model was developed to simulate the variation of temperature field due to heat and fluid flow with various properties of the soil and also the influence range of temperature field in different saline aquifers under the same running conditions. On this basis, a theoretical analysis was made on the relationship between the soil properties of the saline aquifer and the characteristics of temperature field. The results show that, the influence range of geo-temperature field in saline aquifer changes with the variation of the soil properties under the influences of the underground water flow condition and thermal conductivity system, and the heat transfixion among pumping –injection wells could be avoided or reduced if selecting the proper saline aquifer to inject under the same operation situation.