闭式U型管太阳能热水系统的应用及经济性分析

Application and Economic Analysis on Closed-loop U-tubular Solar Water Heating System

针对目前工程上常用的全玻璃真空管式集热系统的使用缺点和局限性,以某办公楼工程为例介绍了一种闭式U型管式太阳能系统在集中热水供应中的应用,对系统设计、运行原理进行了简要介绍。根据热经济学和工程经济学原理,综合分析了系统在实际工程中的供热成本、财务内部收益率、投资回收期等指标,结果表明U型管式太阳能系统比传统燃气锅炉系统的供热成本更低,具有较高的经济效益和投资回报。

Considering the disadvantages and limitations of all-glass evacuated tube solar system used widely in engineering, a kind of closed-loop U-tubular solar water heating system for central hot wa- ter supply was presented, and its design and operation principle were introduced. According to thermal economics and engineering economics, the economic indicators of the system including heating costs, fi- nancial internal rate of return and investment payback period were comprehensively analyzed with an of- fice building for example. The results showed that the U-tubular solar system was eheaper than conven- tional gas-fired boiler in supplying domestic hot water. It has better economic benefits and investment returns.