Heat and Mass Transfer

, Volume 50, Issue 8, pp 1081–1090 | Cite as

Preliminary thermodynamic study for an efficient turbo-blower external combustion Rankine cycle

  • Manuel Romero GómezEmail author
  • Javier Romero Gómez
  • Ramón Ferreiro Garcia
  • Álvaro Baaliña Insua


This research paper presents a preliminary thermodynamic study of an innovative power plant operating under a Rankine cycle fed by an external combustion system with turbo-blower (TB). The power plant comprises an external combustion system for natural gas, where the combustion gases yield their thermal energy, through a heat exchanger, to a carbon dioxide Rankine cycle operating under supercritical conditions and with quasi-critical condensation. The TB exploits the energy from the pressurised exhaust gases for compressing the combustion air. The study is focused on the comparison of the combustion system’s conventional technology with that of the proposed. An energy analysis is carried out and the effect of the flue gas pressure on the efficiency and on the heat transfer in the heat exchanger is studied. The coupling of the TB results in an increase in efficiency and of the convection coefficient of the flue gas with pressure, favouring a reduced volume of the heat exchanger. The proposed innovative system achieves increases in efficiency of around 12 % as well as a decrease in the heat exchanger volume of 3/5 compared with the conventional technology without TB.


Heat Exchanger Convection Heat Transfer Coefficient Combustion System Rankine Cycle Turbo Compressor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

List of symbols


Heat transfer area (m2)


Specific heat at constant pressure (J/kg K)


Diameter (m)


Equivalent diameter (m)


Friction factor (dimensionless)


Mass flow rate per area unit (kg/m2 s)


Specific enthalpy (kJ/kg)


Convection heat transfer coefficient (W/m2 K)


Molar specific enthalpy (kJ/kmol)


Thermal conductivity (W/mK)

\(\mathop m\limits^{ \cdot }\)

Mass flow rate (kg/s)


Moles of combustion products


Moles of combustion reactants


Baffles number (dimensionless)


Number of tube passes (dimensionless)


Pressure (bar)


Specific heat (kJ/kg)

\(\mathop Q\limits^{ \cdot }\)

Heat transfer rate (kW)


Reynolds number (dimensionless)


Temperature (°C)


Overall heat transfer coefficient (W/m2K)


Mean velocity (m/s)


Specific work (kJ/kg)


Excess air rate (%)


Total pressure drop at the tube inside (Pa)


Pressure drop at the shell side (Pa)


Logarithmic mean temperature difference (°C)



Lower heating value


Supercritical Rankine cycle




Turbine inlet temperature

Greek symbols


Air–fuel ratio


Effectiveness (dimensionless)


Density (kg/m3)


Dynamic viscosity (Pa s)


Thermal efficiency


Overall efficiency


Mechanical efficiency


Alternator efficiency


Combustion efficiency







Tube inside




Flue gas


Tube outsider




Heat exchanger shell


  1. 1.
    Hiereth H, Prenninger P (2003) Charging the internal combustion engine. Springer, ViennaGoogle Scholar
  2. 2.
    KKesgin U (2005) Effect of turbocharging system on the performance of a natural gas engine. Energy Convers Manag 46(1):11–32CrossRefGoogle Scholar
  3. 3.
    Wang L-S, Yang S (2006) Turbo-cool turbocharging system for spark ignition engines. Proc Inst Mech Eng Pt D J Automob Eng 220(8):1163–1175CrossRefGoogle Scholar
  4. 4.
    Ababneh AK, Jawarneh AM, Tlilan HM, Ababneh MK (2009) The effects of the secondary fluid temperature on the energy transfer in an unsteady ejector with a radial-flow diffuser. Heat Mass Transf 46(1):95–105CrossRefGoogle Scholar
  5. 5.
    Klein SA (2012) Engineering equation solver (EES). Academic Professional V9.172Google Scholar
  6. 6.
    Guo T, Wang H, Zhang S (2011) Comparative analysis of natural and conventional working fluids for use in transcritical rankine cycle using low-temperature geothermal source. Int J Energy Res 35(6):530–544CrossRefGoogle Scholar
  7. 7.
    Zhang XR, Yamaguchi H, Fujima K, Enomoto M, Sawada N (2007) Theoretical analysis of a thermodynamic cycle for power and heat production using supercritical carbon dioxide. Energy 32(4):591–599CrossRefGoogle Scholar
  8. 8.
    Chen Y, Lundqvist P, Johansson A, Platell P (2006) A comparative study of the carbon dioxide transcritical power cycle compared with an organic Rankine cycle with R123 as working fluid in waste heat recovery. Appl Ther Eng 26(17–18):2142–2147CrossRefGoogle Scholar
  9. 9.
    Li X, Zhang X (2011) Component energy analysis of solar powered transcritical CO2 Rankine cycle system. J Therm Sci 20(3):195–200CrossRefGoogle Scholar
  10. 10.
    Kim YM, Kim CG, Favrat D (2012) Transcritical or supercritical CO2 cycles using both low- and high-temperature heat sources. Energy 43(1):402–415CrossRefGoogle Scholar
  11. 11.
    Vélez F, Segovia J, Chejne F, Antolín G, Quijano A, Carmen Martín M (2011) Low temperature heat source for power generation: exhaustive analysis of a carbon dioxide transcritical power cycle. Energy 36(9):5497–5507CrossRefGoogle Scholar
  12. 12.
    Tuo H (2012) Thermal-economic analysis of a transcritical Rankine power cycle with reheat enhancement for a low-grade heat source. Int J Energy Res. doi: 10.1002/er.2886 Google Scholar
  13. 13.
    Jeong WS, Lee JI, Jeong YH (2011) Potential improvements of supercritical recompression CO2 Brayton cycle by mixing other gases for power conversion system of a SFR. Nucl Eng Des 241(6):2128–2137CrossRefMathSciNetGoogle Scholar
  14. 14.
    Moisseytsev A, Sienicki JJ (2010) Extension of the supercritical carbon dioxide Brayton cycle for application to the very high temperature reactor. Int Congr Adv Nucl Power Plants ICAPP 1:439–447 Google Scholar
  15. 15.
    Oh CH, Moore RL (2005) Brayton cycle for high-temperature gas-cooled reactors. Nucl Technol 149(3):324–336Google Scholar
  16. 16.
    Garcia RF (2012) Efficiency enhancement of combined cycles by suitable working fluids and operating conditions. Appl Therm Eng 42:25–33CrossRefGoogle Scholar
  17. 17.
    Ferreiro-Garcia R, Demiguel-Catoira A, Romero-Gomez J, Romero-Gomez M (2012) El efecto positivo de las condiciones de condensación cuasi-criticas aplicadas a ciclos Rankine. DYNA Ingeniería e Industria. doi: 10.6036/ES1011
  18. 18.
    Lemmon EW, Jacobsen RT, Penoncello SG, Friend DG (2000) Thermodynamic properties of air and mixtures of nitrogen, argon, and oxygen from 60 to 2000 K at pressures to 2000 MPa. J Phys Chem Ref Data 29(3):331–362CrossRefGoogle Scholar
  19. 19.
    Smyth R (1997) A proposal for the use of a very high temperature ceramic heat exchanger in gas turbine power production Article No. 97088. Energy Convers Eng Conf 1:1696–1701Google Scholar
  20. 20.
    Colombo P, Mera G, Riedel R, Sorarù GD (2010) Polymer-derived ceramics: 40 years of research and innovation in advanced ceramics. J Am Ceram Soc 93(7):1805–1837Google Scholar
  21. 21.
    Min JK, Jeong JH, Ha MY, Kim KS (2009) High temperature heat exchanger studies for applications to gas turbines. Heat Mass Transfer 46(2):175–186CrossRefGoogle Scholar
  22. 22.
    Sommers A, Wang Q, Han X, T’Joen C, Park Y, Jacobi A (2010) Ceramics and ceramic matrix composites for heat exchangers in advanced thermal systems: a review. Appl Therm Eng 30(11–12):1277–1291CrossRefGoogle Scholar
  23. 23.
    Consonni S, Farina F (1996) Externally fired combined cycles (EFCC). Part A: thermodynamic and technological issues. ASME International Gas Turbine and Aeroengine Congress and Exhibition, Birmingham, UKGoogle Scholar
  24. 24.
    Incropera FP, Dewitt DP (2002) Fundamentals of heat and mass transfer, 5th edn. Wiley, New YorkGoogle Scholar
  25. 25.
    Kakac S, Liu H (2002) Heat exchangers: selection, rating and thermal design, 2nd edn. CRC Press, New YorkGoogle Scholar
  26. 26.
    Janna WS (2099) Engineering heat transfer, 3rd edn. CRC Press, New YorkGoogle Scholar
  27. 27.
    Yang Z, Zhao Z, Liu Y, Chang Y, Cao Z (2011) Convective heat transfer characteristics of high-pressure gas in heat exchanger with membrane helical coils and membrane serpentine tubes. Exp Therm Fluid Sci 35(7):1427–1434CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Manuel Romero Gómez
    • 1
    Email author
  • Javier Romero Gómez
    • 1
  • Ramón Ferreiro Garcia
    • 2
  • Álvaro Baaliña Insua
    • 1
  1. 1.Department of Energy and Marine Propulsion, ETSNMUniversity of A CoruñaA CoruñaSpain
  2. 2.Department of Industrial Engineering, ETSNMUniversity of A CoruñaA CoruñaSpain

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