two-pipe heating system

Analyses three projects that the differential pressure controllers are used in two-pipe heating systems with household heat metering,recommends some selective principles of three projects,points out that gravity head may not be considered when hydraulic calculation is operated in the design condition,and two-pipe heating systems with household heat metering should be the direct-return system.

对压差控制阀在分户计量双管供暖系统中的三个应用方案进行了分析 ,给出了各方案的选择原则 ,并指出分户计量双管供暖系统在设计工况下进行水力计算时 ,自然作用压头可以不予考虑 ,户内和户外系统应采用异程式。