48. Optimization and Energy Efficiency Research of a Large Reclaimed Water Source Heat Pump System

This work describes a large reclaimed water source heat pump system, and elaborate on the composition of the system and its design principles. We make an energy planning for its service area and in accordance with the progress of the project’s investment and construction, the system is divided into two stages: the phase I with the energy bus system; the project of phase II uses centralized indirect district heating system, it uses a two-stage heat pump unit in order to reduce the temperature lift of the main heat pump. The whole system adopts the distributed circulating pump power system. The work also analyzes the heating capacity of the system, when the phase II project is completed, the system can provide hydronic heating water with the supply and return water temperature of 55/15 °C, and meet the hydronic heating demand of 8 million square meters of residential buildings. Calculated the coal consumption indicators per unit area in a heating period and compared with the regional boiler room heating system, 8 million square meters of district heating in a heating season can save 53,161 tons of standard coal. The coal saving rate reaches 39.32 %.