Quoted results of numerical studies of the effectiveness of the thermal scheme of geothermal power plant. Performed analysis of exergy efficiency of the power plant. Analysis of the results shows that the energetic efficiency (gross) of the turbine is 92,99- 95,16% for the various bodies working in the geothermal water temperature of 70 0C, and the relative change in the turbine exergy is 3,24-9,37%. Thermal efficiency of the turbine is 3,45- 3,90%. With increasing temperature geothermal water to 130 0C, thermodynamic efficiency characteristics vary. Thus, the energetic efficiency (gross) of the turbine is reduced to values 85,69-93,06%. Coefficient of utilization cycle of geothermal power station at a temperature of geothermal water of 70 0C is about 11.50% at 130 0C, respectively - 28,50-54,88%. Specific exergy loss in the pump ranges from 1.33 to 13.03 kJ / kg, and exergetic efficiency from 84.50 to 93.75%. Exergetic losses in the pre-heater and evaporator increases and the value of energetic efficiency (gross) decreased to 31,0-43,4%. Condenser is also observed an increase in the loss of exergy of the working substance due to significant difference in temperature (tk–to.c.).
Alkhasov, A. B. (2001). Prospects for increasing the capacity of binary geothermal power plants. Thermal Engineering, 48(2), 110-113.
Alkhasov, A. B., Aliyev, R. M., & Magomedbekov, Kh. G. (1997). Prospects of two-contour geothermal power plant construction. Renewable Energy, 10(2-3), 363-366. https://doi.org/10.1016/S0960-1481(96)00076-5
https://doi.org/10.1016/0960-1481(96)00093-6
Anderson, A., & Rezaie, B. (2019). Geothermal technology: Trends and potential role in a sustainable future. Applied Energy, 248, 18-34. https://doi.org/10.1016/j.apenergy.2019.04.102
https://doi.org/10.1016/j.apenergy.2019.04.102
Bugai, V. (2013). Rational thermodynamic parameters of cycles of a multi-stage geothermal power station. In Proceedings of the Stanford Geothermal Workshop. Stanford University. https://pangea.stanford.edu/ERE/db/GeoConf/papers/SGW/2013/
DiPippo, R. (2004). Second law assessment of binary plants generating power from low-temperature geothermal fluids. Geothermics, 33(5), 565-586. https://doi.org/10.1016/j.geothermics.2003.10.003
https://doi.org/10.1016/j.geothermics.2003.10.003
DiPippo, R. (2016). Geothermal power plants: Principles, applications and case studies (4th ed.). Butterworth-Heinemann. https://doi.org/10.1016/C2013-0-16444-9
https://doi.org/10.1016/B978-0-08-100879-9.00045-8
Frick, S., Kranz, S., Saadat, A., & Huenges, E. (2009). Design approach for geothermal binary power plants (Low-Bin Project Report). https://www.lowbin.eu
Kanoglu, M., & Bolatturk, A. (2008). Performance and parametric investigation of a binary geothermal power plant by exergy. Renewable Energy, 33(11), 2366-2374. https://doi.org/10.1016/j.renene.2008.01.017
https://doi.org/10.1016/j.renene.2008.01.017
Kanoglu, M., Dincer, I., & Rosen, M. A. (2012). Exergy analysis of thermal systems. Elsevier. https://doi.org/10.1016/B978-0-08-097089-9.00001-9
Li, J., Pei, G., Li, Y., Wang, D., & Ji, J. (2012). Energetic and exergetic investigation of an organic Rankine cycle at different heat source temperatures. Energy, 38(1), 85-95. https://doi.org/10.1016/j.energy.2011.12.032
https://doi.org/10.1016/j.energy.2011.12.032
Long, X., Sun, L., Wang, Q., Wang, J., Li, B., & Xie, H. (2026). A critical review of technological advancements and challenges in geothermal power generation. Renewable and Sustainable Energy Reviews, 232, Article 116810. https://doi.org/10.1016/j.rser.2026.116810
https://doi.org/10.1016/j.rser.2026.116810
Lund, J. W., Huttrer, G. W., & Toth, A. N. (2022). Characteristics and trends in geothermal development and use, 1995-2020. Geothermics, 105, Article 102522. https://doi.org/10.1016/j.geothermics.2022.102522
https://doi.org/10.1016/j.geothermics.2022.102522
Lund, J. W., Toth, A. N., & Huttrer, G. W. (2020). Direct utilization of geothermal energy 2020 worldwide review. Geothermics, 90, Article 101915. https://doi.org/10.1016/j.geothermics.2020.101915
https://doi.org/10.1016/j.geothermics.2020.101915
Moran, M. J., & Shapiro, H. N. (2004). Fundamentals of engineering thermodynamics (5th ed.). Wiley. https://doi.org/10.1002/9780470419045
Saleh, B., Koglbauer, G., Wendland, M., & Fischer, J. (2007). Working fluids for low-temperature organic Rankine cycles. Energy, 32(7), 1210-1221. https://doi.org/10.1016/j.energy.2006.07.001
https://doi.org/10.1016/j.energy.2006.07.001
Wang, J., Dai, Y., & Gao, L. (2009). Exergy analyses and parametric optimizations for different cogeneration power plants. Applied Energy, 86(6), 941-948. https://doi.org/10.1016/j.apenergy.2008.09.007
https://doi.org/10.1016/j.apenergy.2008.09.007
Wiśniewski, S., & Bańkowski, M. (2024). Effectiveness operation analysis of a binary ORC power plant with zeotropic organic fluid. Archives of Thermodynamics, 45(2), 129-138. https://doi.org/10.24425/ather.2024.150859
https://doi.org/10.24425/ather.2024.150859
Yari, M. (2010). Exergetic analysis of various types of geothermal power plants. Renewable Energy, 35(1), 112-121. https://doi.org/10.1016/j.renene.2009.07.023
https://doi.org/10.1016/j.renene.2009.07.023
Zhang, H., Quoilin, S., Lemort, V., & Wang, J. (2021). A review of organic Rankine cycle systems for waste heat recovery and geothermal applications. Renewable and Sustainable Energy Reviews, 138, Article 110568. https://doi.org/10.1016/j.rser.2020.110568
https://doi.org/10.1016/j.rser.2020.110568