Relationship between zero-pressure-difference point and transporting power in distributed pump heating systems

Puts forward the zero-pressure-difference point to analyse the hydraulic condition and operating energy consumption of the distributed pump heating system. Studies the distribution of zero-pressure-difference points by total resistance loss of water supply and return pipes between heat source and one of zero-pressure-difference points, and determines the configuration of circulating pumps and pressure profile. The transporting power of heat medium is shown on flow-pressure head graph under certain condition, as well as the relationship between the power and zero-pressure-difference points. Puts forward the condition to achieve the required power. With a project case, discusses qualitatively several representative configuration schemes of circulating pumps.