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太阳能热变换器制蒸汽系统性能研究

DOI: 10.13334/j.0258-8013.pcsee.2015.15.005, PP. 3776-3784

Keywords: 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

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Abstract:

构建了一套蒸汽产量为1t/h(制热功率为620kW)的太阳能辅助吸收式热变换器(solarassistedabsorptionheattransformer,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200W/m2增加到1000W/m2时,系统热效率提高20.4个百分点,制热功率增加1090kW;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619.5kW,然后下降至206.6kW。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。

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