地热源非共沸工质有机朗肯循环发电性能分析
发布时间：2018-09-04 20:58
【摘要】：建立有机朗肯循环热力学模型和蒸发器传热模型;基于工质的实验经验状态方程,利用REFPROP 8.0软件获得非共沸工质物性;以获得最佳的凝汽器温度匹配为原则选择工质。采用种温度的地热能,在给定的蒸发器和凝汽器夹点温差下,分析了采用组分比例为0.64:0.36的R600a/R601非共沸工质的有机朗肯循环发电系统的特性,并与R601纯工质发电循环进行了比较。结果表明:以对外输出功为目标函数的利用地热的中低温有机朗肯循环发电系统中不宜加入回热器;对于蒸发器热源进出口温差较小的工况,如热源来自水蒸气凝结放热,采用混合工质的循环的性能不如纯工质的;有机朗肯循环采用混合工质时其最大对外输出功要高于纯工质的,且热源温度越低时,这种优势越明显。
[Abstract]:The thermodynamic model of organic Rankine cycle and the heat transfer model of evaporator are established, the physical properties of non-azeotropic working fluid are obtained by REFPROP 8.0 software based on the experimental empirical state equation of working fluid, and the optimum temperature matching of condenser is selected as the principle. Under the given temperature difference between evaporator and condenser, the characteristics of organic Rankine cycle power generation system with R600a/R601 non-azeotropic working fluid of 0.64: 0.36 are analyzed and compared with R601 pure refrigerant cycle. The results show that a regenerator should not be added to the medium and low temperature organic Rankine cycle power generation system with the external output power as the objective function, and for the condition where the temperature difference between the inlet and outlet of the evaporator heat source is small, such as the heat source comes from the condensation heat release of water vapor, The performance of the cycle with mixed working fluid is not as good as that of pure working fluid, and the maximum output work of organic Rankine cycle is higher than that of pure working fluid, and the higher the temperature of heat source is, the more obvious this advantage is.
【作者单位】： 电站设备状态监测与控制教育部重点实验室(华北电力大学);
【基金】：国家自然科学基金项目(U1361108)~~
【分类号】：TM619
[Abstract]:The thermodynamic model of organic Rankine cycle and the heat transfer model of evaporator are established, the physical properties of non-azeotropic working fluid are obtained by REFPROP 8.0 software based on the experimental empirical state equation of working fluid, and the optimum temperature matching of condenser is selected as the principle. Under the given temperature difference between evaporator and condenser, the characteristics of organic Rankine cycle power generation system with R600a/R601 non-azeotropic working fluid of 0.64: 0.36 are analyzed and compared with R601 pure refrigerant cycle. The results show that a regenerator should not be added to the medium and low temperature organic Rankine cycle power generation system with the external output power as the objective function, and for the condition where the temperature difference between the inlet and outlet of the evaporator heat source is small, such as the heat source comes from the condensation heat release of water vapor, The performance of the cycle with mixed working fluid is not as good as that of pure working fluid, and the maximum output work of organic Rankine cycle is higher than that of pure working fluid, and the higher the temperature of heat source is, the more obvious this advantage is.
【作者单位】： 电站设备状态监测与控制教育部重点实验室(华北电力大学);
【基金】：国家自然科学基金项目(U1361108)~~
【分类号】：TM619
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