Solar energy based power generation systems can reduce pollutants emissions by reducing fossil fuel consumption. A new option for this idea is the Organic Rankine cycle coupled with a concentrating solar collector. The present study provides the Organic Rankine cycle performance using energy, exergy and economic approaches, selecting the appropriate operating fluid for the cycle consisting of Organic Rankine cycle and Linear Fresnel solar reflector. The effect of different organic fluid as well as different nanofluids on the overall performance of the cycle is investigated. Sensitivity analysis is discussed to evaluate the effect of various factors such as solar radiation, inlet temperature of solar system, mass flow rate, and inlet temperature and pressure of turbine on energy system performance. It was found that, the results provided in the present study do not correspond to any of the findings of previous similar studies. In addition, about 170 collectors of Linear Fresnel reflectors are needed to supply the thermal power required by the Organic Rankine cycle system. Under design conditions, the Levelized Cost of Energy and Simple payback time for the proposed hybrid system are obtained 0.0446 Euro/kWh and 7.74 years, respectively. Furthermore, the investment cost of the Linear Fresnel reflector system plays a key role in the economic justification of the proposed hybrid energy system.

中文翻译：

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考虑不同传热流体影响的聚光太阳能集热器与有机朗肯循环混合能源过程综合评价

基于太阳能的发电系统可以通过减少化石燃料消耗来减少污染物排放。这个想法的一个新选择是有机朗肯循环与聚光太阳能集热器相结合。本研究利用能源、火用和经济方法提供有机朗肯循环性能，为由有机朗肯循环和线性菲涅尔太阳反射器组成的循环选择合适的工作流体。研究了不同有机流体以及不同纳米流体对循环整体性能的影响。讨论了敏感性分析，以评估太阳辐射、太阳能系统入口温度、质量流量、涡轮机入口温度和压力等各种因素对能源系统性能的影响。结果发现，本研究提供的结果与之前类似研究的任何结果都不相符。此外，还需要大约170个线性菲涅耳反射器收集器来提供有机朗肯循环系统所需的热能。在设计条件下，所提出的混合动力系统的平准化能源成本和简单投资回收时间分别为 0.0446 欧元/kWh 和 7.74 年。此外，线性菲涅耳反射器系统的投资成本在所提出的混合能源系统的经济合理性中起着关键作用。