International Scientific Journal

Thermal Science - Online First

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The steady thermodynamics of a flash-binary geothermal power system based on correction models validated by static tests

The operation parameters and performance of a flash-binary power system are analyzed based on four scenarios of the experiment (Exp), optimum design (OD), error correction model 1 (ECM1) and error correction model 2 (ECM2). The operation parameters of a flash-binary power system are tested to explain steady in the experiment with heat source temperature ranges from 100°C to 150°C. The results show that the simulation data of error correction model 2 have a good agreement with the experiment and most parameter values of relative error δ are less than 5%. The expander with low isotropic efficiency results in the largest exergy losses in the flashbinary power system. The flash-binary power system has better performance to adapt to the mid-high temperature geothermal resource in China. Some valuable data obtained from the research can be applied in the future power plant construction in China's southern Tibet, western Yunnan and Sichuan.
PAPER REVISED: 2019-04-25
PAPER ACCEPTED: 2019-05-08
  1. F. Yang, J. Tan, Q. Zhao, Z. Du, et al., Characteristics of PM2.5 speciation in representative megacities and across China, Atmos. Chem. Phys 11 (2011) 5207-5219
  2. Q. Zhang, R. Yan, J. Fan, S. Yu, et al., A heavy haze episode in shanghai in December of 2013: characteristics, origins and implications, Aerosol Air Qual. Res 15 (2015) 1881-1893.
  3. Q. Liu, J. Baumgartner, Y. Zhang, J.J. Schauer, et al., Source apportionment of Beijing air pollution during a severe winter haze event and associated pro-inflammatory responses in lung epithelial cells, Atmos. Environ. 126 (2016) 28-35.
  4. R. DiPippo, Geothermal power plants: principles, applications, case studies and environmental impact. 2nd ed. UK: Butterworth-Heinemann, Elsevier; 2008.
  5. E. E. Michaelides, Alternative energy sources. Berlin: Springer; 2012.
  6. I. Stober, K. Bucher, Geotherma lenergy: from theoretical models to exploration and development. Springer-Verlag 2013.
  7. D. Chandrasekharam, J. Bundschuh, Low-enthalpy geothermal resources for power generation. Taylor&Francis 2008.
  8. J. Hou, M. Cao, P. Liu, Development and utilization of geothermal energy in China: Current practices and future strategies, Renewable Energy 125 (2018) 401-412.
  9. J. Zhu, K. Hu, X. Lu. A review of geothermal energy resources, development, and applications in China: current status and prospects, Energy 93 (2015) 466-483.
  10. E. Efstathios, S. Michaelides, Future directions and cycles for electricity production from geothermal resources, Energy Conversion and Management 107 (2016) 3-9.
  11. A. D. Pasek, T. A. Fauzi Soelaiman, C. Gunawan,Thermodynamics study of flash-binary cycle in geothermal power plant, Renewable and Sustainable Energy Reviews 15 (2011) 5218-5223.
  12. Y. Zhao, J. Wang. Exergoeconomic analysis and optimization of a flash-binary geothermal power system, Applied Energy 179 (2016) 159-170.
  13. A. Aali, N. Pourmahmoud, V. Zare, Exergoeconomic analysis and multi-objective optimization of a novel combined flash-binary cycle for Sabalan geothermal power plant in Iran, Energy Conversion and Management, 143 (2017) 377-390.
  14. N. Shokati, F. Ranjbar, M. Yari. Comparative and parametric study of double flash and single flash/ORC combined cycles based on exergoeconomic criteria, Applied Thermal Engineering 91 (2015) 479-495.
  15. A. Franco, M. Villani, Optimal design of binary cycle power plants for water-dominated, medium-temperature geothermal fields, Geothermics 38 (2009) 379-391.
  16. X. Lu, Y. Zhao, J. Zhu, W. Zhang. Optimization and applicability of compound power cycles for enhanced geothermal systems, Applied Energy 229 (2018) 128-141.
  17. M. Zeyghami, Performance analysis and binary working fluid selection of combined flashbinary geothermal cycle, Energy 88 (2015) 765-774.
  18. L. Li, Y.T. Ge, X. Luo, Experimental investigations into power generation with low grade waste heat and R245fa Organic Rankine Cycles (ORCs), Applied Thermal Engineering 115 (2017) 815-824.
  19. P. Song, M. Wei, L. Shi, A review of scroll expanders for organic Rankine cycle systems, Applied Thermal Engineering 75 (2015) 54-64.
  20. Z. Wu, D. Pan, N. Gao, Experimental testing and numerical simulation of scroll expander in a small scale organic Rankine cycle system, Applied Thermal Engineering 87 (2015) 529-537.
  21. J.C. Chang, C.W. Chang, T.C, Hung, Experimental study and CFD approach for scroll type expander used in low-temperature organic Rankine cycle, Applied Thermal Engineering 73 (2014) 1444-1452.
  22. S. Quoilin, V. Lemort, J. Lebrun, Experimental study and modeling of an organic Rankine cycle using scroll expander, Applied Energy 87 (2010) 1260-1268.