Optimized peak heat source configuration for secondary network of renewable energy heating system

Combined with the characteristics of geothermal heating system, adopts a heating mode of energy station plus terminal heat exchange station, with the medium-deep geothermal energy for essential heat load and the natural gas boiler for peak heating load. Based on the annual cost method, develops a model aiming at minimal annual operating cost and annual life cycle cost. Taking a new district in Xian as an example, analyses the energy consumption, initial investment and annual operating costs with different peak heat load factors. The results show that the optimal peak heat load factor is 0.25.