International Research Journal of Innovations in Engineering and Technology - IRJIET International Open Access, Monthly, Peer Reviewed, Reputed Journal ISSN (online): 2581-3048

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DOI Prefix: 10.47001/IRJIET

Analysis of Geothermal Wells with High Non-Condensable Gas (NCG) Content as an Alternative Energy Source to Reduce House Load on Indonesia’s Geothermal Power Plant

Revki RomadhonMaster of Energy Department, Diponegoro University, Semarang, Central Java, IndonesiaSulistyoMaster of Energy Department, Diponegoro University, Semarang, Central Java, Indonesia & Mechanical Engineering Department, Diponegoro University, Semarang, Central Java, IndonesiaUdi HarmokoMaster of Energy Department, Diponegoro University, Semarang, Central Java, Indonesia & Physics Department, Diponegoro University, Semarang, Central Java, Indonesia

Vol 7 No 4 (2023): Volume 7, Issue 4, April 2023 | Pages: 108-114

International Research Journal of Innovations in Engineering and Technology

OPEN ACCESS | Research Article | Published Date: 27-04-2023

doi Logo doi.org/10.47001/IRJIET/2023.704017

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Abstract

Geothermal wells with a high Non-Condensable Gas (NCG) content still have a certain amount of heat and pressure energy. Geothermal Power Plant (GPP) power generation can be interrupted by high NCG. Energy in high NCG wells can be utilized to reduce house load on GPP to avoid disturbances in the overall GPP system. In this study, the existing condensate pump in the GPP uses an electric motor that supplies power from the house load. This article aims to see the opportunities for utilizing geothermal wells with high NCG as a driver of a back-pressure steam turbine. The back-pressure steam turbine will couple to the condensate pump that must inject the condensate into the injection well. The research methodology is collecting actual data from geothermal wells and condensate pump in the GPP. The analysis of data will focus on thermodynamics from the well to drive the condensate pump by using steam turbine back-pressure. The result of the study is that the steam flow rate needed to drive the condensate pump in the maximum condition is about 3.31 kg/s, and the actual steam flow rate from a high NCG well is about 4.53 kg/s. It indicates that the geothermal well can drive the condensate pump. It can reduce the house load of GPP to about 138.79 kW per hour or about 1215 MW per year.

Keywords

Geothermal, Non-Condensable Gas (NCG), back-pressure steam turbine, condensate pump, thermodynamics


Citation of this Article

Revki Romadhon, Sulistyo, Udi Harmoko, “Analysis of Geothermal Wells with High Non-Condensable Gas (NCG) Content as an Alternative Energy Source to Reduce House Load on Indonesia’s Geothermal Power Plant” Published in International Research Journal of Innovations in Engineering and Technology - IRJIET, Volume 7, Issue 4, pp 108-114, April 2023. Article DOI https://doi.org/10.47001/IRJIET/2023.704017

Licence Copyright (c) 2026 International Research Journal of Innovations in Engineering and Technology creative common licence This work is licensed under Creative common Attribution Non Commercial 4.0 Internation Licence
References
  1. Asof, A., Pasra, N. and Hidayat, T. (2014) ‘Kajian Gas Removal System Dengan Memanfaatkan Second Ejector Dan Men-Stanby-Kan Liquid Ring Vacuum Pump Pada Sub Unit Darajat, UPJP Kamojang’, Sekolah Tinggi Teknik PLN [Preprint].
  2. Bahadori, A. and Vuthaluru, H.B. (2010) ‘Estimation of performance of steam turbines using a simple predictive tool’, Applied Thermal Engineering, 30(13), pp. 1832–1838. Available at: https://doi.org/10.1016/j.applthermaleng.2010.04.017.
  3. Banaś, J. et al. (2007) ‘Effect of CO2 and H2S on the composition and stability of passive film on iron alloys in geothermal water’, Electrochimica Acta, 52(18), pp. 5704–5714. Available at: https://doi.org/10.1016/j.electacta.2007.01.086.
  4. Cen, J. and Jiang, F. (2022) ‘A Practical Field Test and Simulation Procedure for Prediction of Scaling in Geothermal Wells Containing Noncondensable Gases’, Processes, 10(10). Available at: https://doi.org/10.3390/pr10102018.
  5. Chao, D. and Yongjian, S. (2021) ‘Working process of steam turbine and establishment of start-up model’, International Journal of Physics Research and Applications, 4(1), pp. 039–047. Available at: https://doi.org/10.29328/journal.ijpra.1001040.
  6. Dincer, I. and Ezzat, M.F. (2018) ‘Renewable Energy Production’, in Comprehensive Energy Systems. Elsevier Inc., pp. 126–207. Available at: https://doi.org/10.1016/B978-0-12-809597-3.00310-2.
  7. Gokcen, G. and Yildirim, N. (2008) Effect of Non-Condensable Gases on geothermal power plant performance. Case study: Kizildere Geothermal Power Plant-Turkey, Int. J. Exergy.
  8. El Haj Assad, M., Bani-Hani, E. and Khalil, M. (2017) ‘Performance of geothermal power plants (single, dual, and binary) to compensate for LHC-CERN power consumption: comparative study’, Geothermal Energy, 5(1). Available at: https://doi.org/10.1186/s40517-017-0074-z.
  9. el Haj Assad, M., Bani-Hani, E. and Khalil, M. (2017) ‘Performance of geothermal power plants (single, dual, and binary) to compensate for LHC-CERN power consumption: comparative study’, Geothermal Energy, 5(1). Available at: https://doi.org/10.1186/s40517-017-0074-z.
  10. Kholiq, I. (2015) ‘Pemanfaatan Energi Alternatif Sebagai Energi Terbarukan Untuk Mendukung Subtitusi BBM’, Jurnal IPTEK, 19.
  11. Mrzljak, V. et al. (2022) ‘Thermodynamic analysis of backpressure and condensing steam turbines from cogeneration system’, Technical Sciences. Industrial Management [Preprint]. Available at: https://www.researchgate.net/publication/359218458.
  12. Overland, I., Juraev, J. and Vakulchuk, R. (2022) ‘Are renewable energy resources more evenly distributed than fossil fuels?’, Renewable Energy, 200, pp. 379–386. Available at: https://doi.org/10.1016/j.renene.2022.09.046.
  13. PLN Indonesia (2020) RUPTL 2021-2030. Indonesia. Available at: www.pln.co.id.
  14. Qazizada, M.E., Sviatskii, V. and Bozek, P. (2016) ‘Analysis performance characteristics of centrifugal pumps’, MM Science Journal, 2016(OCTOBER), pp. 1151–1159. Available at: https://doi.org/10.17973/MMSJ.2016_10_201691.
  15. Sabri, M. et al. (2020) ‘Reliability investigation of steam turbine critical components’, in IOP Conference Series: Materials Science and Engineering. Institute of Physics Publishing. Available at: https://doi.org/10.1088/1757-899X/801/1/012125.
  16. Saptadji M (2019) Teknik Panasbumi. Bandung: ITB.
  17. Selimli, S. and Sunay, S. (2021) ‘Feasibility study of the energy and economic gain that can be achieved by driving the boiler feedwater pump with a backpressure steam turbine’, Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 235(5), pp. 1254–1266. Available at: https://doi.org/10.1177/0957650920969466.
  18. Sufyana, C.M., Akbar, F.T. and Srigutomo, W. (2023) ‘Thermal modeling and simulation of a single-flash geothermal power plant involving non-condensable gas: a case study of Kamojang geothermal field in Garut, West Java, Indonesia’, Geothermal Energy, 11(1), p. 6. Available at: https://doi.org/10.1186/s40517-023-00249-3.
  19. Valdimarsson, P. (2011) Geothermal Power Plant Cycles and Main Components. Iceland.
  20. Yildirim Ozcan, N. and Gokcen, G. (2009) ‘Thermodynamic assessment of gas removal systems for single-flash geothermal power plants’, Applied Thermal Engineering, 29(14–15), pp. 3246–3253. Available at: https://doi.org/10.1016/j.applthermaleng.2009.04.031.
  21. Zhao, X. et al. (2021) ‘Performance improvement of low-pressure cylinder in high back pressure steam turbine for direct heating’, Applied Thermal Engineering, 182. Available at: https://doi.org/10.1016/j.applthermaleng.2020.116170.

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