Study on pressure difference control schemes for indirect heating primary water pumping distribution systems

Taking the central heating project of a building complex in Beijing as an example, this paper quantitatively analyses the annual hourly operating energy consumption of the indirect heating primary water pumping distribution system under different pressure difference control schemes. The results show that compared with the conventional constant pressure difference at the near and end, the variable pressure difference operation of the primary water pump based on end valve opening detection can significantly reduce the energy consumption of heating transmission and distribution, improve the adjustment accuracy of the electric control valve on the primary side of the heat exchange station, and have good economy.