A Feasibility Study of Geothermal Space Heating System in Tianjin Port Residential District

Abstract

The building area of Tianjin Port Residential District is about 600,000 square metres, which has been heated using fuel oil in winter for the past ten years and 13000 tons of fuel oil is used in every winter. But, the price of fuel oil is high in China. The heating system is not economical. Since the area is rich in geothermal resources, this paper analyses the existing heating systems and proposes reasonable geothermal space heating parameters when it is used in place of fuel oil. Proper peaking scheme must be chosen in order to raise the utilization efficiency of geothermal energy. So,this paper also describes the technicaleconomic analysis among four kinds of peaking schemes ó fuel oil boiler, electric heat pump, the combination of fuel oil with heat pump and turbin-driven heat pump. The results show that under the present technical-economic conditions the system using part of the existing fuel oil boilers as peaking equipment will be the least in investment, simple and reliable in operation. The alterative peaking scheme is the combination of electric heat pump and fuel oil boiler. This scheme is also superior to that of using fuel oil alone. Now. a geothermal space heating system is under construction in accordance with this study on the area.