THERMAL SCIENCE

International Scientific Journal

Guidong Huang

,

Songyuan Zhang

,

Zhong Ge

,

Zhiyong Xie

,

Zhipeng Yuan

,

Chong Tang

,

Jianbin Xie

,

Jian Xu

THERMAL PERFORMANCE ANALYSIS OF ORGANIC FLASH CYCLE USING R600A/R601A MIXTURES WITH INTERNAL HEAT EXCHANGER

ABSTRACT
In this study, the thermal performance of an internal heat exchanger-organic flash cycle system driven by geothermal water was investigated. The R600a/R601a mixtures were selected as the working fluid. The effects of the mole fraction of mixtures on the heat absorption capacity of the heater, the temperature rise of cold working fluid in the internal heat exchanger, net power output, thermal efficiency, and electricity generation costs were analyzed. The net power outputs, electricity generation costs, and thermal efficiency of the internal heat exchanger-organic flash cycle and simple organic flash cycle systems were com-pared. Results showed that the system using the R600a/R601a mixtures (0.7/0.3 mole fraction) has the largest net power output, which increased the net power output by 3.68% and 42.23% over the R601a and R600a systems, respectively. When the R600a mole fraction was 0.4, the electricity generation costs reduction of the internal heat exchanger-organic flash cycle system was the largest (1.77% compared with the simple organic flash cycle system). The internal heat exchanger can increase the thermal efficiency of organic flash cycle, but the net power output does not necessarily increase.
KEYWORDS
organic flash cycle, internal heat exchanger, zeotropic mixtures, thermal efficiency
PAPER SUBMITTED: 2020-05-07
PAPER REVISED: 2020-06-15
PAPER ACCEPTED: 2020-09-21
PUBLISHED ONLINE: 2020-10-10
DOI REFERENCE: https://doi.org/10.2298/TSCI200507296H
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 1, PAGES [767 - 779]
REFERENCES
  1. Ge, Z ., et al., Thermodynamic analysis of dual - loop organic Rankine cycle using zeotropic mixtures for internal combustion engine waste heat recovery. Energy Conversion and Management, 166 (2018), 6, pp. 201 - 2 14 .
  2. Yang, F. F., et al., On the temperature dependence of the α function in the cubic equation of state. Chemical Engineering Science, 192 (2018), 8, pp. 565 - 575.
  3. Liu, H. D ., et al., Multi - objective optimization of fin - and - tube evaporator for a diesel engine organic Rankine cycle (ORC) combined system using particle swarm optimization algorithm. Energy Conversion and Management, 151 (2017), 11, pp. 147 - 157.
  4. Yang, F. F., et al., The cubic - plus - association equation of state for hydrofluorocarbons, hydrofluoroolefins, and their binary mixtures. Chemical Engineering Science, 209 (2019), 12, 115182.
  5. DiPippo, R., Geothermal power plants: principles, applications, and case studies. Oxford: Elsevier, 34 ( 2005 ), pp. 77 2 - 773 .
  6. Liu, Q., et al., Performance analyses of geothermal organic Rankine cycles with selected hydrocarbon working fluids. Energy, 63 (2013), 12, pp. 123 - 1 32.
  7. Ho, T ., et al., Comparison of the Organic Flash Cycle (OFC) to other advanced vapor cycles for intermediate and high temperature waste heat reclamation and solar thermal energy. Energy, 42 (2012), 6, pp. 213 - 2 23.
  8. Lee, H. Y ., et al., Comparative analysis of thermodynamic performance and optimization of organic flash cycle (OFC) and organic Rankine cycle (ORC). Applied Thermal Engineering, 100 (2016), 5, pp. 680 - 6 90.
  9. Mondal, S ., et al., Power by waste heat recovery from low temperature industrial flue gas by organic flash cycle (OFC) and Transcritical - CO2 power cycle: a comparative study through combined thermodynamic and economic analysis. Energy, 121 (2017), 2, pp. 832 - 8 40.
  10. Mosaffa, A. H., et al., Proposal and thermo-economic analysis of geothermal flash binary power plants utilizing different types of organic flash cycle. Geothermics, 72 (2018), 5, pp. 47 - 63.
  11. Ho, T ., et al., Increased power production through enhancements to the Organic Flash Cycle (OFC). Energy, 45 ( 2 012 ), 9, pp. 686 - 695.
  12. Varma, G. V. P, et al. Power generation from low temperature heat recovery
  13. Li, Z ., et al. Comparison study of Trilateral Rankine Cycle, Organic Flash Cycle and basic Organic Rankine Cycle for low grade heat recovery
  14. Kishimoto, A ., et al., Study of the Flash Cycle Using Liquid Heat Recirculation (FC - LHR) for Energy Saving in Industry. Chemical Engineering Transactions, 24 ( 20 14 ), 12, pp. 1 - 6.
  15. Mondal, S ., et al., Waste heat recovery through organic flash cycle (OFC) using R245fa - R600 mixtures as the working fluid. C lean Technologies and Environmental Policy, 21 ( 2019 ), 10, pp. 1575 - 1586.
  16. Li, J ., et al., Effects of heat source temperature and mixtures composition on the combined superiority of dual - pressure evaporation organic Rankine cycle and zeotropic mixtures. Energy, 174 (2019), 5, pp. 436 - 449 .
  17. Liu, Q ., et al., Effect of condensation temperature glide on the performance of organic Rankine cycles with zeotropic mixtures working fluids. Applied Energy, 115 (2014), 2, pp. 394 - 404.
  18. Wang, Y.P., Liu, X., Ding, X.Y., et al., Experimental investigation on the performance of ORC power system using zeotropic mixture R601 a/R600a
  19. Liu, Q ., et al., Parametric optimization and performance analyses of geothermal organic Rankine cycles using R600a/R601a mixtures as working fluids. Applied Energy, 148 (2015), 6, pp. 410 - 420 .
  20. Zhu, J. L., et al., Parametric optimization of organic Rankine cycle with R245fa/R601a as working fluid. Transactions of Tianjin University, 21 ( 2015 ), 1, pp. 69 - 75 .
  21. Li, T. L., et al., Experimental comparison of R245fa and R245fa/R601a for organic Rankine cycle using scroll expander. Energy research, 3 9 (2015), 2, pp. 202 - 214 .
  22. Li, J ., et al., Performance analyses and improvement guidelines for organic Rankine cycles using R600a/R601a mixtures driven by heat sources of 100°C to 200°C. International Journal of Energy Research, 43 (2019), 2, pp. 905 - 920.
  23. Li, W., et al., Effects of evaporating temperature and internal heat exchanger on organic Rankine cycle. Applied Thermal Engineering, 31 ( 2011 ), 12, pp. 4014 - 4023 .
  24. Li, T, L., et al., Performance analysis and improvement of geothermal binary cycle power plant i n oilfield. Journal of Central South University, 20 (2013), 2, pp. 457 - 465.
  25. Yang, F. B., et al., Performance analysis of waste heat recovery with a dual loop organic Rankine cycle (ORC) system for diesel engine under various operating conditions. Energy Con version and Management, 80 (2014), 4, pp. 243 - 255 .
  26. Lu, J. L ., et al., Analysis of organic Rankine cycles using zeotropic mixtures as working fluids under different restrictive conditions. Energy Conversion and Management, 126 (2016), 10, pp. 704 - 716.
  27. Steven, L ., et al., Review of organic Rankine cycle (ORC) architectures for waste heat recovery. Renewable and Sustainable Energy Reviews, 47 (2015), 7, pp. 448 - 461 .
  28. Yang, F. B ., et al., Thermo-economic multi - objective optimization of an organic Rankine cycle for exhaust waste heat recovery of a diesel engine. Energy, 93 (2015), 6, pp. 2208 - 2228.
  29. Heberle, F ., et al., Zeotropic mixtures as working fluids in organic Rankine cycles for low - enthalpy geothermal resources. Renew Energy, 37 (2012), 6, pp. 364 - 370.
  30. Lecompte, S ., et al., Exergy analysis of zeotropic mixtures as working fluids in organic Rankine cycles. Energy Conversion and Management, 85 (2 014), 9, pp. 727 - 739.
  31. Li, J., et al., Performance analysis of organic Rankine cycle using R600a/R601a mixtures with liquid - separated condensation. Applied Energy, 190 (2017), 6, pp. 376 - 389.
  32. Mondal, S ., et al., Performance assessment of a low grade waste heat driven organic flash cycle (OFC) with ejector. Energy, 163 (2018), 11, pp. 849 - 862.
PDF VERSION [DOWNLOAD]
Thermal performance analysis of organic flash cycle using R600A/R601A mixtures with internal heat exchanger

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence