No upper limit value was set for total volume of thermal storage V_r in heat supply formula of volumetric water heater,which was specified in the Building Water and Wastewater Design Criteria,and it will result in an unfavorable consequence,that is,the designed heat supply per hour will be equal to zero or less than heat consumption based on hourly average flow rate.

Under the worst conditions,the mix ratio of fresh air and the exhausted,and heat supply quantity are calculated out.

With the premise of full consideration to heating quality and economic operation, it is necessary to use the method of dividing stage of stage mass regulating, as well as some suggestions to the specific application of the method are provided.

Analysis of influencing factors of variable flow rate in a heat metering system;

Employment of flow adjustment formulas in heat metering systems;

As a new type of "commodity" ,the heat metering is entering people\'s lives.

Through the comparative analysis of the acquired data from 2006 to 2007 in a metered heating residential area,the location heat consumption ratio coefficient that reflects the influence of user room locations on their metered heat is calculated.

The metered heating system of residential area in Tianjin is studied.

On the basis of the analysis of heat transfer between heat users with metered heating,taking a residential building as study subject and every heat user as an isothermal unit,heat balance equation group is established,and the average room calculation temperature of different heat users during the heating period is determined.