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A study on generating a map for selection of optimum power generation cycles used for Enhanced Geothermal Systems

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  • Zhu, Jialing
  • Hu, Kaiyong
  • Zhang, Wei
  • Lu, Xinli

Abstract

A useful map is generated for selecting optimum power generation cycles used for Enhanced Geothermal Systems. Detailed analysis on the thermodynamic performance has been carried out for four power generation systems: single-flash (SF), double-flash (DF), flash-organic Rankine cycle (FORC), and double-flash-organic Rankine cycle (DFORC). Only subcritical ORC cycles with R245fa as working fluid are analyzed in the study. The map is generated based on comparisons among the four systems with a goal of increasing the net power output by 20% under the condition that the SF is replaced by one of the upgraded systems (DF, FORC, and DFORC). Geofluid's temperature and dryness have strong influences on the performance of each system. FORC has the best thermodynamic performance when the geofluid's temperature is less than 170 °C. DF should be used if the temperature of the geofluid is greater than 170 °C and the steam dryness is less than 0.2. When the steam dryness is greater than 0.2, either DFORC or DF could be an option, but the DFORC is more attractive under a lower geofluid's temperature condition. In terms of engineering economy, DFORC is the most cost-effective system when the geofluid has a relative high temperature and dryness. FORC has a shorter payback period than DF system under the same geofluid's condition.

Suggested Citation

  • Zhu, Jialing & Hu, Kaiyong & Zhang, Wei & Lu, Xinli, 2017. "A study on generating a map for selection of optimum power generation cycles used for Enhanced Geothermal Systems," Energy, Elsevier, vol. 133(C), pages 502-512.
    • Handle: RePEc:eee:energy:v:133:y:2017:i:c:p:502-512
    DOI: 10.1016/j.energy.2017.05.130
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    Citations

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    Cited by:

    1. Yuan Zhao & Chenghao Gao & Chengjun Li & Jie Sun & Chunyan Wang & Qiang Liu & Jun Zhao, 2022. "Energy and Exergy Analyses of Geothermal Organic Rankine Cycles Considering the Effect of Brine Reinjection Temperature," Energies, MDPI, vol. 15(17), pages 1-20, August.
    2. Liu, Xiaolei & Falcone, Gioia & Alimonti, Claudio, 2018. "A systematic study of harnessing low-temperature geothermal energy from oil and gas reservoirs," Energy, Elsevier, vol. 142(C), pages 346-355.
    3. Olasolo, P. & Juárez, M.C. & Morales, M.P. & Olasolo, A. & Agius, M.R., 2018. "Analysis of working fluids applicable in Enhanced Geothermal Systems: Nitrous oxide as an alternative working fluid," Energy, Elsevier, vol. 157(C), pages 150-161.
    4. Vaccari, Marco & Pannocchia, Gabriele & Tognotti, Leonardo & Paci, Marco & Bonciani, Roberto, 2020. "A rigorous simulation model of geothermal power plants for emission control," Applied Energy, Elsevier, vol. 263(C).
    5. Hai, Tao & Zoghi, Mohammad & Abed, Hooman & Chauhan, Bhupendra Singh & Ahmed, Ahmed Najat, 2023. "Exergy-economic study and multi-objective optimization of a geothermal-based combined organic flash cycle and PEMFC for poly-generation purpose," Energy, Elsevier, vol. 268(C).
    6. Chen, Tairu & Liu, Gang & Liao, Shengming, 2019. "Impacts of boundary conditions on reservoir numerical simulation and performance prediction of enhanced geothermal systems," Energy, Elsevier, vol. 181(C), pages 202-213.
    7. Lee, Inkyu & Tester, Jefferson William & You, Fengqi, 2019. "Systems analysis, design, and optimization of geothermal energy systems for power production and polygeneration: State-of-the-art and future challenges," Renewable and Sustainable Energy Reviews, Elsevier, vol. 109(C), pages 551-577.
    8. Schifflechner, Christopher & Dawo, Fabian & Eyerer, Sebastian & Wieland, Christoph & Spliethoff, Hartmut, 2020. "Thermodynamic comparison of direct supercritical CO2 and indirect brine-ORC concepts for geothermal combined heat and power generation," Renewable Energy, Elsevier, vol. 161(C), pages 1292-1302.
    9. Lu, Xinli & Zhao, Yangyang & Zhu, Jialing & Zhang, Wei, 2018. "Optimization and applicability of compound power cycles for enhanced geothermal systems," Applied Energy, Elsevier, vol. 229(C), pages 128-141.

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