【摘要】 对低温(60～150℃)地热有机朗肯循环(ORC)系统,以净输出电功和系统能量损失作为评价指标,分析不同地热流体温度下有机工质R290,R134a,R600a,R600,R601a的做功能力,确定最佳循环工质。分析结果表明:对于湿流体工质,由于临界温度较低,当地热流体温度高于其临界温度20℃时,不存在最佳蒸发温度;对于60～80℃的地热流体,工质R601a的最大净输出电功最大;对于90～120℃的地热流体,工质R134a的最大净输出电功最大;对于125～150℃的地热流体,工质R290的净输出电功最大。这些结果为中低温地热利用提供设计依据。更多还原

【Abstract】 This paper presents the analysis on the selection of optimum working fluid for organic rankine cycle(ORC)in low temperature(60～150℃)geothermal power generation system by testing R290,R134a,R600a,R600 and R601a as the working fluids,respectively.The results show:There is no optimum evaporation temperature for wet fluids when the temperature of brine is 20℃ above its critical temperature.When the temperature of brine is within the range of 60～80℃,the output net power of R601a is the highest;within the range of 90～120℃,the output net power of R134a is the highest;within the range of 125～150℃,the output net power of R290 is the highest.更多还原