单管顺序式系统改造工程投资回收年限计算

Calculation of the Payback Period of Investment for the Renovation of the One-Pipe Series Loop Heating System

对用温控阀改造单管顺序式系统的方案 ,计算了三种不同燃料的投资回收年限 ;指出当燃料为油和天然气时 ,使用温控阀进行改造 。

Calculates the payback period of investment of three kinds of fuel for one-pipe series loop heat-ing system renovated by using thermostatic radiator valve,summarizes that the renovated system of using thermostatic radiator valve not only saves energy,but also may rapidly recover initial investment when oil or natural gas is used as fuel.