太阳能热变换器制蒸汽系统性能研究  

Performances of a Steam Generation System With a Solar Assisted Absorption Heat Transformer

作　　者：刘锋[1] 隋军[1] 刘浩[1] 金红光[1] 

机构地区：[1]中国科学院工程热物理研究所,北京市海淀区100190

出　　处：《中国电机工程学报》2015年第15期3776-3784,共9页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973计划)(2014CB249202);国家国际科技合作专项(2014DFG62450)~~

摘　　要：构建了一套蒸汽产量为1 t/h(制热功率为620 kW)的太阳能辅助吸收式热变换器(solar assisted absorption heat transformer,SAAHT)制蒸汽系统,探讨了太阳辐照强度、环境温度以及蒸汽凝水回收率对制热量和系统热效率的影响。结果表明,当太阳辐照强度由200 W/m2增加到1 000 W/m2时,系统热效率提高20.4个百分点,制热功率增加1 090 kW;当环境温度由15℃升高到33℃时,系统热效率先由26.6%缓慢增大至27.8%,然后快速下降至9.27%,制热功率先由593.6kW增大至619.5 kW,然后下降至206.6 kW。当蒸汽凝水由不回收变化到全回收,系统热效率提高2.75个百分点,制热功率增加61kW。研究提出不同太阳辐照强度、环境温度以及凝水回收率条件下系统最佳集热温度。经济性分析结果表明,该系统产汽成本为162元/t,其替代燃油锅炉和燃气锅炉时,投资回收期介于1.95年和6.70年之间,与燃煤锅炉相比,没有明显的价格优势,但CO2减排量突出。A solar assisted absorption heat transformer （SAAHT） system generating 1 t /h low pressure steam was developed and the influence of solar radiation intensity, ambient temperature and condensate water recovery ratio of low pressure steam on the system thermal efficiency and heat load used by the steam user were studied. When solar radiation intensity ranges from 200 W/m2 to 1 000 W/m2, the system thermal efficiency increases by 20.4 percentage points and heat load for steam user increases 1 090 kW. When ambient temperature ranges from 15 ~C to 33 ~C, the system thermal efficiency increases from 26.6% to 27.8%, and then decreases to 9.27%; heat load for steam user increases from 593.6kW to 619.5 kW and then decreases to 206.6kW. When condensate water recovery ratio ranges from 0 to 1, the system thermal efficiency increases by 2.75 percentage points and heat load for steam user increases 61 kW. Considering the variation of solar radiation intensity, ambient temperature or condensate water recovery ratio of low pressure steam, there exist different optimal collector temperatures to provide a basis for optimal operation of the system. Economic analysis results show that the steam production cost is ￥ 162/t and the payback period is between 1.95 years and 6.70 years while replacing oil-fired boiler or gas-fired boiler. SAAHT system shows no obvious economic advantages but environmental advantage in comparison to coal-fired boiler.

关 键 词：能源互联网 太阳能集热器 吸收式热变换器 低压蒸汽 最佳集热温度 经济性分析 

分 类 号：TK123[动力工程及工程热物理—工程热物理]