Study on Hydraulic Regime of Household Horizontal Two-pipe Heating System with Compartment Temperature Control

In this paper,for the household heat metering system,the variation trends of hydraulic regime of household horizontal two-pipe heating system with compartment temperature control were analyzed.Firstly,using the Kirchhoff's first and second laws,the models for hydraulic regime of each circuit were established.And then,considering the force of gravity circulation in the two-pipe system,the variation trends of hydraulic regime were obtained when occupants adjusted the indoor temperature.The research results indicated that for the household horizontal two-pipe heating system,the thermostat valve of non-regulated room would turn down automatically when it was affected by the thermostat valve of regulated room,and the thermostat valve which was far away from the regulated room would be affected little.Furthermore,when the occupants lowered the indoor temperature,the corresponding pressure regulating valve would turn down to keep the system hydraulic balance.