Application Research on Gradient Utilization of Geothermal Water in a Heating Process

Abstract

Geothermal water is a material widely used to provide thermal energy for heating supply in China. To protect the water resource, save energy and ensure the sustainable economic development, more attention must be paid to reach the rational utilization of the geothermal water. In this paper, gradient utilization of the geothermal water in Donggu area in Tianjin China is studied with the analysis of the heating operation case of the heating control center in Donggu. Analysis results show that, both the direct geothermal supply at the beginning and the end of the heating and the direct geothermal supply combined adjusting heat by the heat pump in the middle of the heating alleviate the shortage situation of the heating water source in Donggu area by the gradient utilization of the geothermal tail water. In this way, the stability of the heating is ensured, and it meets the heating temperature requirements. And the purposes of saving energy, reducing consumption and protecting the resources are achieved.