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Hybrid geothermal–fossil electricity generation from low enthalpy geothermal resources: geothermal feedwater preheating in conventional power plants

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  • Bruhn, Matthias

Abstract

Hybrid steam power plants with geothermal feedwater preheating enable the conversion of geothermal energy into electricity in countries with low enthalpy geothermal resources. In order to estimate the potential of geothermal–fossil hybrid power plants with geothermal feedwater preheating, we examine the application of this concept using the examples of two modern coal fired power plants. In addition, energy output and economic efficiency calculations will be compiled for this concept utilising the thermal water data of an existing geothermal heating installation and an experimental facility for the hot dry rock technology. The process of geothermal feedwater preheating as a means of improving performance forms both an alternative and an extension to the existing electricity generation methods based on renewable energy. Photovoltaics or wind power, for example, tend to be expensive and also unreliable due to weather uncertainties. An electricity cost of around 85 EUR/MWh appears to be attainable through the geothermal preheating concept in Central Europe. In countries with the appropriate prerequisites, this concept heralds considerable benefits in terms of efficient electricity generation and environmental protection.

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  • Bruhn, Matthias, 2002. "Hybrid geothermal–fossil electricity generation from low enthalpy geothermal resources: geothermal feedwater preheating in conventional power plants," Energy, Elsevier, vol. 27(4), pages 329-346.
    • Handle: RePEc:eee:energy:v:27:y:2002:i:4:p:329-346
    DOI: 10.1016/S0360-5442(01)00088-3
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    1. Barbier, Enrico, 1997. "Nature and technology of geothermal energy: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 1(1-2), pages 1-69, March.
    2. DiPippo, Ronald, 1991. "Geothermal energy Electricity generation and environmental impact," Energy Policy, Elsevier, vol. 19(8), pages 798-807, October.
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    2. Zhang, Hongsheng & Hao, Ruijun & Liu, Xingang & Zhang, Ning & Guo, Wenli & Zhang, Zhenghui & Liu, Chengjun & Liu, Yifeng & Duan, Chenghong & Qin, Jiyun, 2022. "Thermodynamic performance analysis of an improved coal-fired power generation system coupled with geothermal energy based on organic Rankine cycle," Renewable Energy, Elsevier, vol. 201(P1), pages 273-290.
    3. Scardigno, Domenico & Fanelli, Emanuele & Viggiano, Annarita & Braccio, Giacobbe & Magi, Vinicio, 2015. "A genetic optimization of a hybrid organic Rankine plant for solar and low-grade energy sources," Energy, Elsevier, vol. 91(C), pages 807-815.
    4. Liu, Qiang & Shang, Linlin & Duan, Yuanyuan, 2016. "Performance analyses of a hybrid geothermal–fossil power generation system using low-enthalpy geothermal resources," Applied Energy, Elsevier, vol. 162(C), pages 149-162.
    5. Tempesti, Duccio & Manfrida, Giampaolo & Fiaschi, Daniele, 2012. "Thermodynamic analysis of two micro CHP systems operating with geothermal and solar energy," Applied Energy, Elsevier, vol. 97(C), pages 609-617.
    6. Fu, Chao & Anantharaman, Rahul & Gundersen, Truls, 2015. "Optimal integration of compression heat with regenerative steam Rankine cycles in oxy-combustion coal based power plants," Energy, Elsevier, vol. 84(C), pages 612-622.
    7. Li, Yuanyuan & Zhou, Luyao & Xu, Gang & Fang, Yaxiong & Zhao, Shifei & Yang, Yongping, 2014. "Thermodynamic analysis and optimization of a double reheat system in an ultra-supercritical power plant," Energy, Elsevier, vol. 74(C), pages 202-214.
    8. Dominika Matuszewska & Piotr Olczak, 2020. "Evaluation of Using Gas Turbine to Increase Efficiency of the Organic Rankine Cycle (ORC)," Energies, MDPI, vol. 13(6), pages 1-21, March.
    9. Guzović, Z. & Lončar, D. & Ferdelji, N., 2010. "Possibilities of electricity generation in the Republic of Croatia by means of geothermal energy," Energy, Elsevier, vol. 35(8), pages 3429-3440.
    10. Tempesti, Duccio & Fiaschi, Daniele, 2013. "Thermo-economic assessment of a micro CHP system fuelled by geothermal and solar energy," Energy, Elsevier, vol. 58(C), pages 45-51.
    11. Köse, Ramazan, 2005. "Research on the generation of electricity from the geothermal resources in Simav region, Turkey," Renewable Energy, Elsevier, vol. 30(1), pages 67-79.
    12. Agudelo, Andrés & Valero, Antonio & Usón, Sergio, 2013. "The fossil trace of CO2 emissions in multi-fuel energy systems," Energy, Elsevier, vol. 58(C), pages 236-246.
    13. Shu, Gequn & Zhao, Jian & Tian, Hua & Liang, Xingyu & Wei, Haiqiao, 2012. "Parametric and exergetic analysis of waste heat recovery system based on thermoelectric generator and organic rankine cycle utilizing R123," Energy, Elsevier, vol. 45(1), pages 806-816.
    14. Olabi, Abdul Ghani & Mahmoud, Montaser & Soudan, Bassel & Wilberforce, Tabbi & Ramadan, Mohamad, 2020. "Geothermal based hybrid energy systems, toward eco-friendly energy approaches," Renewable Energy, Elsevier, vol. 147(P1), pages 2003-2012.
    15. Chamorro, César R. & Mondéjar, María E. & Ramos, Roberto & Segovia, José J. & Martín, María C. & Villamañán, Miguel A., 2012. "World geothermal power production status: Energy, environmental and economic study of high enthalpy technologies," Energy, Elsevier, vol. 42(1), pages 10-18.

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