分布式水泵供热系统零压差点与输送功率的关系
Relationship between zero-pressure-difference point and transporting power in distributed pump heating systems
摘要：
为了研究分布式水泵供热系统的水力工况和运行能耗，提出以零压差点作为该系统的水力标志，利用它与热源之间供、回水管段的总阻力损失分析管网中多个零压差点的分布，同时唯一确定了系统循环水泵的配置和压力分布。利用特定工况下的流量-压头图分析了各种循环水泵配置方案的输送功率，说明了零压差点与热媒输送功率的关系，并指出了系统达到需用功率的条件。通过工程实例的分析，定性讨论了若干典型的循环水泵配置方案。
Abstract：
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.
Keywords:distributed pump heating system, hydraulic condition, zero-pressure-difference point, transporting