Thermodynamic analysis of an Organic Rankine Cycle (ORC) based on industrial data
Thermodynamic analysis of an Organic Rankine Cycle (ORC) based on industrial data
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DOI：
10.1016/j.applthermaleng.2015.07.079
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发表时间：
2015-12
影响因子：
6.4
通讯作者：
N. F. Ozdil;M. Segmen;A. Tantekin
中科院分区：
文献类型：
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作者：
N. F. Ozdil;M. Segmen;A. Tantekin
在这项研究中，热力学分析的有机朗肯循环（ORC）是在当地的电厂，位于土耳其南部。所分析的系统包括作为组件的蒸发器、涡轮机、冷凝器、泵和发电机。使用实际工厂数据和性能周期分别分析系统组件。观察到夹点与火用效率之间的关系。随着夹点温度的降低，由于（火用）损失率降低，（火用）效率提高。在真实的工况下，计算得到ORC的能量效率和火用效率分别为9.96%和47.22%。为了说明蒸发器入口水相的影响，计算了不同水相时各部件和整个系统的火用损失和火用效率。对于质量分数为0.3的水混合物形式，ORC的火用效率为41.04%。另一方面，对于质量为0.7的水混合物形式，发现其为40.29%。最后，饱和蒸汽形式的计算值为39.95%。系统的（火用）损率分别为：饱和液态520.01kW、干度为0.3的水混合物598.39kW、干度为0.7的水混合物609.5kW、饱和蒸汽614.63kW。分析表明，蒸发器从火用率角度对系统效率有重要影响。蒸发器的研究，特别是为了提高整个系统的性能。
In this study, thermodynamic analysis of an Organic Rankine Cycle (ORC) is presented in a local power plant that is located southern of Turkey. The system that is analyzed includes an evaporator, a turbine, a condenser, a pump and a generator as components. System components are analyzed separately using actual plant data and performance cycle. The relationship between pinch point and exergy efficiency is observed. As the pinch point temperature decreases, the exergy efficiency increases due to low exergy destruction rate. The energy and exergy efficiencies of the ORC are calculated as 9.96% and 47.22%, respectively for saturated liquid form which is the real condition. In order to show the effect of the water phase of the evaporator inlet, exergy destruction and exergy efficiencies of components and overall system are calculated for different water phases. The exergy efficiency of the ORC is calculated as 41.04% for water mixture form which has quality 0.3. On the other hand, it is found as 40.29% for water mixture form which has quality 0.7. Lastly, it is calculated as 39.95% for saturated vapor form. Moreover, exergy destruction rates of the system are 520.01 kW for saturated liquid form, 598.39 kW for water mixture form which has quality 0.3, 609.5 kW for water mixture form which has quality 0.7 and 614.63 kW for saturated vapor form. The analyses show that evaporator has important effect on the system efficiency in terms of exergy rate. The evaporator is investigated particularly in order to improve the performance of the overall system.