Comparison of single and double stage regenerative organic rankine cycle for medium grade heat source through energy and exergy estimation

*Ghalya Pikra -  Research Centre for Electrical Power and Mechatronics (RCEPM) - Indonesian Institute of Sciences (IIoS), Komplek LIPI, Gedung 20, Lantai 2, Jalan Sangkuriang, Bandung, West Java,, Indonesia
Nur Rohmah -  Research Unit for Clean Technology - Indonesian Institute of Sciences (IIoS), Komplek LIPI, Gedung 50, Jalan Sangkuriang, Bandung, West Java, Indonesia, Indonesia
Received: 2 Jul 2018; Revised: 26 Mar 2019; Accepted: 20 Jun 2019; Published: 13 Jun 2019; Available online: 15 Jul 2019.
Open Access Copyright (c) 2019 International Journal of Renewable Energy Development
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Section: Original Research Article
Language: EN
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Abstract
Regenerative organic Rankine cycle (RORC) can be used to improve organic Rankine cycle (ORC) performance. This paper presents a comparison of a single (SSRORC) and double stage regenerative organic Rankine cycle (DSRORC) using a medium grade heat source. Performance for each system is estimated using the law of thermodynamics I and II through energy and exergy balance. Solar thermal is used as the heat source using therminol 55 as a working fluid, and R141b is used as the organic working fluid. The initial data for the analysis are heat source with 200°C of temperature, and 100 L/min of volume flow rate. Analysis begins by calculating energy input to determine organic working fluid mass flow rate, and continued by calculating energy loss, turbine power and pump power consumption to determine net power output and thermal efficiency. Exergy analysis begins by calculating exergy input to determine exergy efficiency. Exergy loss, exergy destruction at the turbine, pump and feed heater is calculated to complete the calculation. Energy estimation result shows that DSRORC determines better net power output and thermal efficiency for 7.9% than SSRORC, as well as exergy estimation, DSRORC determines higher exergy efficiency for 7.69%. ©2019. CBIORE-IJRED. All rights reserved
Keywords
single stage regenerative organic Rankine cycle; double stage regenerative organic Rankine cycle; medium grade heat source; energy; exergy

Article Metrics:

  1. Astolfi, M., Romano, M. C., Bombarda, P., & Macchi, E. (2014). Binary ORC (Organic Rankine Cycles) power plants for the exploitation of medium-low temperature geothermal sources - Part B: Techno-economic optimization. Energy, 66, 435–446.
  2. Braimakis, K., & Karellas, S. (2018a). Energetic optimization of regenerative Organic Rankine Cycle (ORC) configurations. Energy Conversion and Management, 159, 353–370.
  3. Braimakis, K., & Karellas, S. (2018b). Exergetic optimization of double stage Organic Rankine Cycle (ORC). Energy, 149, 296–313.
  4. Cammarata, G., Cammarata, L., & Petrone, G. (2014). Thermodynamic analysis of ORC for energy production from geothermal resources. Energy Procedia, 45, 1337–1343.
  5. Chaiyat, N., Wakaiyang, Y., & Inthavideth, X. (2017). Enhancement efficiency of organic Rankine cycle by using sorption system. Applied Thermal Engineering, 122, 368–379.
  6. Colonna, P., Casati, E., Trapp, C., Mathijssen, T., Larjola, J., Turunen-Saaresti, T., & Uusitalo, A. (2015). Organic Rankine Cycle Power Systems: From the Concept to Current Technology, Applications, and an Outlook to the Future. Journal of Engineering for Gas Turbines and Power, 137(10), 100801.
  7. Feng, Y.-Q., Hung, T.-C., He, Y.-L., Wang, Q., Wang, S., Li, B.-X., … W. Zhang. (2017). Operation characteristic and performance comparison of organic Rankine cycle (ORC) for low-grade waste heat using R245fa, R123 and their mixtures. Energy Conversion and Management, 144, 153–163.
  8. Ge, Z., Wang, H., Wang, H. T., Wang, J. J., Li, M., Wu, F. Z., & Zhang, S. Y. (2015). Main parameters optimization of regenerative organic Rankine cycle driven by low-temperature flue gas waste heat. Energy, 93, 1886–1895.
  9. Imran, M., Park, B. S., Kim, H. J., Lee, D. H., Usman, M., & Heo, M. (2014). Thermo-economic optimization of Regenerative Organic Rankine Cycle for waste heat recovery applications. Energy Conversion and Management, 87, 107–118.
  10. Li, G. (2016). Organic Rankine cycle performance evaluation and thermoeconomic assessment with various applications part I: Energy and exergy performance evaluation. Renewable and Sustainable Energy Reviews, 53, 477–499.
  11. Li, J., Ge, Z., Duan, Y., Yang, Z., & Liu, Q. (2018). Parametric optimization and thermodynamic performance comparison of single-pressure and dual-pressure evaporation organic Rankine cycles. Applied Energy, 217(February), 409–421.
  12. M. Li and B. Zhao. (2016). Analytical thermal efficiency of medium-low temperature organic Rankine cycles derived from entropy-generation analysis. Energy, 106, 121–130.
  13. Moloney, F., Almatrafi, E., & Goswami, D. Y. (2017). Working fluid parametric analysis for regenerative supercritical organic Rankine cycles for medium geothermal reservoir temperatures. Energy Procedia, 129, 599–606.
  14. Moran, M. J., Shapiro, H. N., Boettner, D. D., & Bailey, M. B. (2014). Fundamentals of Engineering Thermodynamics (8th Edition). Wiley.
  15. Rahbar, K., Mahmoud, S., Al-Dadah, R. K., Moazami, N., & Mirhadizadeh, S. A. (2017). Review of organic Rankine cycle for small-scale applications. Energy Conversion and Management, 134, 135–155.
  16. Stability, T. (n.d.). Typical Physical , Chemical and Thermal Properties of Therminol 55.
  17. Vivian, J., Manente, G., & Lazzaretto, A. (2015). A general framework to select working fluid and configuration of ORCs for low-to-medium temperature heat sources. Applied Energy, 156, 727–746.
  18. Xi, H., Li, M.-J., Xu, C., & He, Y.-L. (2013). Parametric optimization of Regenerative organic Rankine cycle (ORC) for low grade waste heat recovery using genetic algorith. Energy, 58, 473–482.
  19. Zhai, H., An, Q., Shi, L., Lemort, V., & Quoilin, S. (2016). Categorization and analysis of heat sources for organic Rankine cycle systems. Renewable and Sustainable Energy Reviews, 64, 790–805.