Influencing factors of energy-saving ratio of heating network residual pressure recovery system

Taking the indirect heating system with tree-shaped networks and a single heat source as the research object, analyses the energy saving effect of the heating network residual pressure recovery system with the hydraulic turbine used to recycle residual pressure of the primary network. Derives the formulas of the total output of hydraulic turbine, the energy consumption of circulating water pumps, the residual pressure energy and the energy-saving ratio, which are validated with an engineering example. Analyses the influences of the number of heat users, the ratio of the heat users using hydraulic turbine to the all heat users, the pressure drops in the main line and the branch line in heating network and the rated pressure heads of the heat source and heat users on the energy-saving ratio.