Energy Analysis of A Retrofitted Regenerative Gas Turbine Organic Cycle in Ihovbor Power Plant

Öz

Gas turbines have gained popularity in power generation application because of its ease in operation, fuel flexibility and low emission of greenhouse gases. When in use as a simple gas turbine (SGT), it has the challenge of low thermal efficiency, which needs improvement to enhance its thermal efficiency and other thermal performances. This paper presents the energy analysis of incorporating a retrofitted combined regenerative gas turbine organic Rankine cycle (CRGTORC) to utilize the exhaust heat from the existing Ihovbor Power plant in Nigeria. The working fluid used in the Organic Rankine Cycle (ORC) section was cyclopentane and the analysis was carried out with the aid of ASPEN HYSYS and REFPROP. The performance of the proposed CRGTORC was compared with the existing SGT. The results obtained revealed that the CRGTORC model increases the net power output, thermal efficiency, overall cycle efficiency and work ratio of the system by 23.53%, 62.24%, 54.60%, and 10.21% respectively. Also, the flue gas losses, specific fuel consumption, and heat rate were reduced by 89.21%, 36.26%, and 36.26% respectively. Furthermore, it was observed that rise in compressor inlet air temperature lead to increase in specific fuel consumption and heat rate and decrease with net power out, thermal efficiency, cycle efficiency, flue gas losses, and work ratio. Thus, from the simulation results, the existing Ihovbor Power plant performance will be improved by integrating the CRGTORC system and its performance is significantly affected by the ambient inlet air temperature.  

Anahtar Kelimeler

• Organic Rankine
• Aspen HYSYS
• Combine
• Efficiency
• Heat Recovery
• Cyclopentane

Kaynakça

1. Kirshen DS and Strbac G. (2018) Fundamental of Power system Economics. 2nd ed. University of Washington USA.
2. De Campos GB, Bringheti C, Traverso A, Tomita J T,(2020) Thermoeconomic Optimization of Organic Rankine Bottoming Cycles for micro gas turbines, Applied Thermal Engineering 164; 114477.
3. Mendoza E, Lin T, Jiang X, (2015) Reduction of gas turbine exhaust temperature limit due to HRSG limitations by change on control curve to optimize plant operation and performance. InASME Turbo Expo 2015: turbine technical conference and exposition 2015. American Society of Mechanical Engineers Digital Collection.
4. Chacartegui R., Sanchez D., Munoz J. M., Sanchez T, (2009) Alternative Orc Bottoming Cycles for Combined Cycle Power Plants. Applied Energy, Vol. 86 pp. 2162-2170.
5. Wang X., Yang Y., Wang M., Zheng Y., Wang J., Dai Y, (2015) Utilization of Waste Heat from Intercooled, Reheat and Recuperated Gas Turbines for Power Generation in Organic Rankine Cycles. 3rd International Seminar on ORC Power Systems, October 12-14, 2015, Brussels, Belgium.
6. Mohanty D. K., Venkatesh V, (2014) Performance Analysis of a Combined Cycle Gas Turbine under Varying Operating Conditions; Mechanical Engineering: An International Journal (MEIJ) Vol. 1, No. 2. pp 11-25.
7. Lebele-Alawa TB, and Le-Ol AK, (2015) Improved Design of a 25 MW Gas Turbine Plant Using Combined Cycle Application, Journal of Power and Energy Engineering, 2015, Vol. 8, No 3, pp 1-14.
8. Yamamoto T, Furuhata T, Arai N. Mori K, (2001) Design and testing of the Organic Rankine Cycle, Energy Vol. 26, Issue 3, pp. 239-251.

9. Tachanche BF, Lambrinos G, Frangoudakis A, Papadakis G,(2011) Low grade heat conversion into power using organic Rankine Cycles – a review of various applications. Renew Sustain Energy Rev 15 (8): 3963 – 79.
10. Velez F, Chejne F, Antolin G, Quijano A, (2012) Theoretical Analysis of a Trans critical power cycle for power generation from waste energy at low temperature heat source. Energy Convers manage 60: 188 – 95.
11. Lecompte S, Huisseune H, van den Broek M, Vanslambrouck B, de Paepe M, (2015) Review of organic Rankine cycle (ORC) architectures for waste heat recovery. Renew Sustain Energy Rev 47: 448 – 61.
12. Najjar YS (2001). Efficient Use of Energy by Utilizing Gas Turbine Combined System. Applied Thermal Engineering Vol. 21, Issue 4 pp. 407-438.
13. Khaljani M., Saray R. K., and Bahlouli K, (2015) Thermodynamic and Thermoeconomic Optimization of An Integrated Gas Turbine and Organic Rankine Cycle. Energy, Vol. 93, Part 2 pp. 2136-2145.
14. Grelet V, Reiche T, Lemort V, Nadri M, Dufour P, (2016) Transient Performance Evaluation of Waste Heat Recovery Rankine Cycle Based System for Heavy Duty Trucks. Applied Energy Vol. 165 pp. 878-892.
15. Mohammadi A., Kasaeian A., Pourfayaz F., Ahmadi M. H (2017) Thermodynamic Analysis of a Combined Gas Turbine, ORC Cycle and Absorption Refrigeration for a CCHP System. Applied Thermal Engineering Vol. 11 pp. 397-406.
16. Caresana F., Comodi G., Pelagalli L., Vagni S, (2008) Micro Combined Plant with Gas Turbine and Organic Cycle Proceedings of ASME Turbo Expo 2008.
17. Yari M, (2008) Thermodynamics Analysis of a Combined Micro Turbine with a Micro ORC; ASME Turbo Expo 2008: Power for Land, Sea, and Air.
18. Invernizzi C, Iora P, Silva P, (2011) Bottoming micro-Rankine cycles for micro-gas turbines, Applied Thermal Engineering Vol. 27(1); pp. 100-110 .
19. Nurhilal O., Mulyana C., Suhendi N., and Sapdiana D, (2016) The Simulation of Organic Rankine Cycle Power Plant with n-Pentane Working Fluid. AIP Conference Proceedings, 2016.
20. Meyer D., Wong C., Engel F. and Krumdieck S, (2013) Design and Build of a 1 kW Organic Rankine Cycle Power Generato. 35th New Zealand Geothermal Workshop: 2013 Proceedings; University of Canterbury, New Zealand.
21. Kumar A, Kachhwaha SS, Mishra RS, (2010) Thermodynamics Analysis of a Regenerative Gas Turbine Cogeneration Plant. Journal of Scientific and Industrial Research Vol. 69(3) pp. 225-231.
22. Ranjan R. and Tariq M, (2014) Analysis of a Regenerative Gas Turbine Cycle for Performance Evaluation. International Journal of Engineering Research and General Science Vol. 2, Issue 4, pp. 792-801.
23. Mahmood OS. and Tariq M, (2014) Analysis of a Regenerative Gas Turbine Cycle for Power Plant; International Journal of Scientific Engineering and Technology Research Vol.03, Issue 04, pp. 0611-0616.
24. Chaczykowski, M, (2016) Organic Rankine Cycle for Residual Heat to Power Conversion in Natural Gas Compressor Station Part II: Plant Simulation and Optimisation Study. Arch. Min. Sci.,Vol. 61, No 2 pp. 259-274.
25. Lee HY and Kim KH, (2015) Energy and Exergy Analyses of a Combined Power Cycle Using the Organic Rankine Cycle and The Cold Energy of Liquefied Natural Gas. Entropy 17, pp. 6412-6432.
26. Sarr J. R., And Mathieu-Potvi F, (2016) Increasing Thermal Efficiency of Rankine Cycles By Using Refrigeration Cycles: A Theoretical Analysis. Energy Conversion And Management, Vol. 121 pp. 358-379.
27. Seta A. L., Meroni A., Andreasen J. G., Pierobon L., Persico G., Haglind F, (2016) Combined Turbine and Cycle Optimization for Organic Rankine Cycle Power Systems—Part B: Application on A Case Study. Energies Vol. 9,
28. Najjar Y. S. H. and Radhawn A. M, (1988) Cogeneration by Combining Gas Turbine Engine with an Organic Rankine Cycle, Heat Recovery Systems and CHP, 1988 Vol. 8, Issue 3, pp. 211-219.
29. Berrera JE, Bazzo E, Kami E, (2015) Exergy analysis and energy improvement of a Brazialian floating oil platform using Oranginc Rankine Cycles. Energy 88: 67 79.
30. Reis MML, Guillen J A V, Gallo WLR, (2019) Off design performance analysis and optimization of the power production by an organic Rankine cycle coupled with gas turbine in an Offshore oil plant form, Energy Conversion and Management 196: 1037 - 1050.
31. Nami H, Ertesvag JS, Agromayor R, Roboldi L, Nord L.O (2018) Gas turbine exhaust gas heat recovery by organic rankine Cycles (ORC) for off shore combined and power applications – Energy and exergy analysis, Energy 165: 1060 – 1071.
32. Batilouli K, (2018) Mutlti – Objective Optimization of a combined cycle using exergetic and exergoeconomic approaches. Energy Convers Manage 171: 1761 – 72.
33. Mazetto BM, Silva JAM, (2015) Oliveira S. Are ORCs a good option for waste heat recovery in a petroleum refinery? Int. J. Thermodyn 18: 206 -11.
34. Calm J. M., Hourahan G. C, (2011) Physical, Safety and Environmental data for current and alternative Refrigerants, ICR 2011, August 21 – 26 Prague, Czech Republic
35. Nouman J, (2012) Comprative Studies and Analysis of Working Fluids for Organic Rankine Cycles-ORC. Master of Science Thesis, KTH School of Engineering and Management 2012.
36. Vivian J., Manente G., Lazzaretto A, (2015) A General Framework to Select Working Fluid and Configuration of ORCs for Low-To-Medium Temperature Heat Sources. Applied Energy Vol. 156, pp. 727-746.
37. Ekwonu M. C., Perry S., Oyedoh E. A, (2014) Modelling of Gas Engines Integrated with Organic Rankine Cycle and Rankine Cycle; Advanced Chemical Engineering Research Vol. 3(1), pp. 43-47.
38. Reza R, (2016) Performance and Cost Evaluation of Organic Rankine Cycle at Different Technologies. Master of Engineering Degree Thesis, Department of Sustainable Energy, KTH, Sweden. 2016.
39. Mago P. J., Chamra L. M. and Somayaji C, (2007) Performance Analysis Of Differrent Working Fluids for Use In Organic Rankine Cycles. Proceedings of the Institution of Mechanical Engineers, Part A, Journal of Power and EnergyVol.22 (3), pp 255 – 264.
40. ASPEN HYSYS, (2016) version 9.0 ASPEN power generation and Refrigeration library manual.PSE version 9.0 ed USA ASPEN Simulation Technology INC, 200-wheeler Road Burlington MA 2016
41. NDPHC, (2014) Draft Technical Specifications for GE Frame PG9171E Gas Turbine Generator and Direct Auxiliaries and Limits of Supply.