Exergy and Exergo-Economic Analysis of Organic Rankine Cycle Driven by Solar Energy and by Using the PCM in Storage Tank

Document Type : Research Article

Authors

1 Faculty of Mechanical and Mechatronics Engineering, Shahrood University of Technology, Shahrood, I.R. IRAN

2 Faculty of Engineering, Mechanical Engineering Department, Ferdowsi University of Mashhad, Mashhad, I.R. IRAN

3 Faculty of Mechanical and Mechatronics Engineering, Shahrood University of Technology, Shahrood I.R. IRAN

Abstract

Organic Rankine Cycles are appropriate technology for the conversion of low-quality thermal energy to electrical power. In this research, the organic Rankine cycle driven by an evacuated tube collector was studied from energy, exergy, and exergo-economic points of view. Then, various cases such as the temperature and pressure input to the turbine, the temperature difference of the evaporator of the organic cycle, and the solar flux were evaluated. Simulation results show that power energy and exergy efficiency are 45.2 and 9.7 and the amount of work output and total irreversibility are 51.5 and 1291.8, respectively. The solar collector and the storage tank are the most important components from the exergo-economic point of view, due to the high initial cost rate and Exergy destruction. The parametric analysis result shows that the temperature increase in the evaporator has a positive effect on cycle operation and, the increase in pinch point temperature difference of evaporator has a negative effect on cycle operation. From an economic point of view, the increase in evaporator and pinch point temperature difference of evaporator causes the decrease in capital coast rate. Also, the solar radiation change finds to have a positive effect on system operation, based on an exergo-economic point of view, which causes the increase in energy and exergy efficiency.

Keywords

Main Subjects


[3] Milad Ashouri, Mohammad H. Ahmadi, S. Mohsen Pourkiaei, Fatemeh Razi Astaraei, Roghaye Ghasempour, Tingzhen Ming, Javid Haj Hemati, Exergy and Exergo-Economic Analysis and Optimization of a Solar Double Pressure Organic Rankine Cycle, Thermal Science and Engineering Progress, 6: 72-86 (2018).
[5] Rayegan R., Tao Y.X., A Procedure to Select Working Fluids for Solar Organic Rankine Cycles (ORCs). Renew. Energ.; 36: 659-70 (2011).
[6] Wang, J., Yan, Z., Zhao, P., Dai, Off-Design Performance Analysis of a Solar Powered Organic Rankine Cycle. Energ. Convers. Manage., 80: 150-157 (2014)
[8] Quoilin S, Orosz M, Hemond H, Lemort V., Performance and Design Optimization of a Low-Cost Solar Organic Rankine Cycle for Remote Power Generation. Sol. Energ, 85: 955-66 (2011)
[9] Ferrara F., Gimelli A., Luongo A., Small-Scaled Concentrated Solar Power (CSP) Plant: ORC’s Comparison for Different Organic Fluids, Energy Procedia.; 45: 217-26 (2014).
[11] پاکدل، علی؛ جعفری نصر، محمدرضا؛ شبیه­سازی و بررسی پارامتری چرخه تجمعی متمرکز­کننده­های سهموی خورشیدی و چرخه­ آلی رانکین برای تولید توان الکتریکی، نشریه شیمی و مهندسی شیمی ایران، (3) 33: 65 تا 83 (1393).
[12] کرمی، احسان؛ جعفری نصر، محمدرضا؛ پرخیال، سهیل، بهینه­سازی ترمودینامیکی و ترمواکونومیک چرخه­ی رانکین آلی برای بازیافت گرمایی از کارخانه­های سیمان، نشریه شیمی و مهندسی شیمی ایران، (1) 37: 219 تا 235 (1397).
[13] Wang J, Yan Z, Wang M, Li M, Dai Y., Multi-Objective Optimization of an Organic Rankine Cycle (ORC) for Low-Grade Waste Heat Recovery Using Evolutionary Algorithm. Energ. Convers. Manage.; 71: 146-58 (2013).
[15] Cagri Kutlu, Jing Li, Yuehong Su, Gang Pei, Saffa Riffat, Off-Design Performance Modelling of a Solar Organic Rankine Cycle Integrated with Pressurized Hot Water Storage Unit for Community-Level Application, Energy Conversion and Management, 166: 132-145(2018).
[16] Saeid Mohammadzadeh Bina, Saeid Jalilinasrabady, Hikari Fujii, Thermo-Economic Evaluation of Various Bottoming ORCs for Geothermal Power Plant, Determination of Optimum Cycle for Sabalan Powerplant Exhaust, Geothermics, 70: 181-191(2017).
[17] Fateme Ahmadi Boyaghchi, Parisa Heidarnejad, Thermoeconomic Assessment and Multi-Objective Optimization of a Solar Micro CCHP Based on Organic Rankine Cycle for Domestic Application,  Energy Conversion and Management, 97: 224-234 (2017).