【摘 要】
：
为改善单目标评价局限性,获取双级有机朗肯循环(ORC)系统的综合最佳性能,选取8种有机工质,针对低温地热水,以输出功、热效率、?效率、单位净功输出所需换热面积APR、单位电力产出成本LEC为评价指标,采用AHP-熵值法对其进行综合评价分析.结果 表明,不同指标下最佳蒸发温度与最优工质不同;热源温度为373 K时,各工质综合评价指标ζ值为R1234yf＞R227ea＞R600a＞R1234ze＞R245fa＞R236ea＞R236fa＞RC318,高温级最佳蒸发温度为351K,低温级最佳蒸发温度为330K;
【机 构】
：
辽宁工程技术大学机械工程学院,阜新123000
论文部分内容阅读
为改善单目标评价局限性,获取双级有机朗肯循环(ORC)系统的综合最佳性能,选取8种有机工质,针对低温地热水,以输出功、热效率、?效率、单位净功输出所需换热面积APR、单位电力产出成本LEC为评价指标,采用AHP-熵值法对其进行综合评价分析.结果 表明,不同指标下最佳蒸发温度与最优工质不同;热源温度为373 K时,各工质综合评价指标ζ值为R1234yf＞R227ea＞R600a＞R1234ze＞R245fa＞R236ea＞R236fa＞RC318,高温级最佳蒸发温度为351K,低温级最佳蒸发温度为330K;热源温度为383 K、393 K、403K、413K、423 K、433 K时,最优工质为R1234yf、R227ea、R245fa、R236fa、R236fa、R600a,最佳蒸发温度随热源温度升高逐渐升高,接近临界温度后具有下降趋势,各工质在接近临界温度工作时具有较高性能.
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