A Thermodynamic Analysis And Comparison Of An Organic Rankine Cycled (ORC) System With Six Different Wet, Dry And Isentropic Working Fluids

Öz

Organic rankine cycle (ORC) is environment friendly waste low heat energy recovery system, utilizing organic working fluid instead of steam utilized in classic rankine cycle. Different types of organic working fluids, which are mainly wet,dry and isentropic, can be used in ORC systems. Isentropic fluids are highly usable, also freons and their alternatives demonstrate similar system responses in ORC system. Thus, organic fluid selection is an important case in terms of not only efficiency, energy and exergy but also safety and environmental concerns. In this study, an organic rankine cycled system with different organic working fluids, which are R134a, R245fa, R152a, R11, R113 and R32 was simulated via a simulation software. After simulations, the results were analyzed and compared. According to this results, the highest system thermal efficiency value as 0,26 was gained with the R11 working fluid. Then, the system thermal efficiency with R113 is 0,21, and then it is 0,20 with R245fa, then the system thermal efficiency with R134a is 0,14, and then it is 0,13 with R152a, and lastly the lowest thermal efficiency is 0,05 with R32, respectively, under same working conditions. Moreover, the biggest generator work is supplied with R11 as 826 kW, then with R152a as 600 kW, then with R113 as 516 kW, then with R245fa as 509 kW, then with R134a as 397 kW, then with R32 the lowest generator work value as 191 kW. Accordingly, as a result, R11, and then R113 supplied the best performance values for this ORC system, respectively. Further future studies on this subject area is on spot and continuing.

Anahtar Kelimeler

• ORC
• Organic working fluids
• energy efficiency
• energy recovery system
• working fluid selection
• thermodynamic analysis

Kaynakça

1. [1] S. Hu, Z. Yang, J. Li and Y. Duan, “A Review of Multi-Objective Optimization in Organic Rankine Cycle (ORC) System Design,” Energies, vol. 14, 6492, 2021.
2. [2] R. Loni, G. Najafi, E. Bellos, F. Rajaee, Z. Said, M. Mazlan, “A review of industrial waste heat recovery system for power generation with Organic Rankine Cycle: Recent challenges and future outlook,” Journal of Cleaner Production, vol. 287, 125070, 2021.
3. [3] A. Kumar, D. Rakshit, “A critical review on waste heat recovery utilization with special focus on Organic Rankine Cycle applications,” Cleaner Engineering and Technology, vol. 5, 100292, December 2021.
4. [4] O. Boydak, I. Ekmekci, M. Yılmaz, and H. Koten, “Thermodynamic investigation of organic rankine cycle energy recovery system and recent studies,” Thermal Science, vol. 22, no. 6A, pp. 2679-2690, 2018.
5. [5] M. Bahrami, A. A. Hamidi and S. Porkhial, “Investigation of the effect of organic working fluids on thermodynamic performance of combined cycle Stirling-ORC,” International Journal of Energy and Environmental Engineering, pp. 4-12, 2013.
6. [6] O. Boydak, “A Thermodynamic Analysis And Comparison Of An Organic Rankine Cycled (ORC) System With Different Organic Working Fluids,” ICEANS 2022 proceeding, May 2022.
7. [7] K. Thurairaja, A. Wijewardane, S. Jayasekara, C. Ranasinghe, “Working fluid selection and performance evaluation of ORC,” Energy Procedia, vol. 156, pp. 244-248, 2019.
8. [8] C. Liu, C. He, H. Gao, X. Xu and J. Xu, “The Optimal Evaporation Temperature of Subcritical ORC Based on Second Law Efficiency for Waste Heat Recovery,” Entropy, vol. 14, pp. 491-504, 2012.

9. [9] T. Guo, H. Wang, S. Zhang, “Fluid Selection for a Low-Temperature Geothermal Organic Rankine Cycle by Energy and Exergy,” 2010 Asia-Pacific Power and Energy Engineering Conference, March 28, 2010.
10. [10] X. Zhang, Y. Zhang, J. Wang, “Evaluation and selection of dry and isentropic working fluids based on their pump performance in small-scale organic Rankine cycle,” Applied Thermal Engineering, vol. 191, 116919, 5 June 2021.
11. [11] H. Zhang, M. Li, Y. Feng, H. Xi, T. Hung, “Assessment and working fluid comparison of steam Rankine cycle -Organic Rankine cycle combined system for severe cold territories,” Case Studies in Thermal Engineering, vol. 28, 101601, December 2021.
12. [12] H. Feng, Z. Wu, L. Chen, Y. Ge, “Constructal thermodynamic optimization for dual-pressure organic Rankine cycle in waste heat utilization system,” Energy Conversion and Management, vol. 227, 113585, 2021, 1 January 2021.
13. [13] E. H. Wang, H. G. Zhang, B. Y. Fan, M. G. Ouyang, Y. Zhao, Q.H.Mu, “Study of working fluid selection of organic Rankine cycle (ORC) for engine waste heat recovery,” Energy, vol. 36, Issue 5, pp. 3406-3418, May 2011.
14. [14] M. Hijriawan, N. A. Pambudi, D. S. Wijayanto, M. K. Biddinika, L. H. Saw, “Experimental analysis of R134a working fluid on Organic Rankine Cycle (ORC) systems with scroll-expander,” Engineering Science and Technology, an International Journal, vol. 29, 101036, May 2022.
15. [15] N. B. Desai, S. Bandyopadhyay, “Thermo-economic analysis and selection of working fluid for solar organic Rankine cycle,” Applied Thermal Engineering, vol. 95, pp. 471-481, 25 February 2016.
16. [16] A. Toffolo, A. Lazzaretto, G. Manente, M. Paci, “A multi-criteria approach for the optimal selection of working fluid and design parameters in Organic Rankine Cycle systems,” Applied Energy vol. 121, pp. 219-232, 15 May 2014.
17. [17] S. Thangavel, V. Verma, Rahul Tarodiya, P. Kaliyaperumal, “Comparative analysis and evaluation of different working fluids for the organic rankine cycle performance,” materialstoday:Proceedings, vol. 47, Part 10, pp. 2580-2584, 2021.