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生物质直燃有机朗肯循环热电联产系统的热力性能分析

, PP. 60-67

Keywords: 生物质,有机朗肯循环,热力性能,抽气回热,热电联产

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Abstract:

有机朗肯循环可有效利用生物质能并实现热电联产。文中建立了抽气回热式有机朗肯循环的热力性能分析模型。针对锅炉负荷为7.9MW,麦秆为燃料,导热油为中间传热介质的生物质直燃系统,分别优化了正葵烷、甲苯、环己烷、八甲基三硅氧烷(MDM)、八甲基环四硅氧烷(D4)和六甲基二硅氧烷(MM)的热力参数。通过夹点分析,临界温度高的工质其主气温度反而低。正葵烷、MDM和D4的主气压力和排气压力较低,气轮机尺寸较大。MDM、D4和MM的排气温度高于200℃,最佳抽气系数较高。当冷凝温度为70℃时,ORC的热效率达25%以上,系统发电功率高于

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