International Journal of Air-Conditioning and Refrigeration

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Effects of Turbine Inlet Temperature on Performance of Regenerative Gas Turbine System with Afterfogging

  • Kim, Kyoung-Hoon (School of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • Kim, Se-Woong (School of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • Ko, Hyung-Jong (School of Mechanical Engineering, Kumoh National Institute of Technology)
  • Published : 2009.12.31
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Abstract

Afterfogging of the regenerative gas turbine system has an advantage over inlet fogging in that the high outlet temperature of air compressor makes the injection of more water and the recuperation of more exhaust heat possible. This study investigates the effects of turbine inlet temperature (TIT) on the performance of regenerative gas turbine system with afterfogging through a thermodynamic analysis model. For the standard ambient conditions and the water injection ratios up to 5%, the variation of system performance including the thermal efficiency is numerically analyzed with respect to the variations of TIT and pressure ratio. It is also analyzed how the maximum thermal efficiency, net specific work, and pressure ratio itself change with TIT at the peak points of thermal efficiency curve. All of these are found to increase almost linearly with the increases of both TIT and water injection ratio.

Keywords

References

  1. Jonsson M. and Yan j., 2005, Humidified gas turbines - a review of proposed and implemented cycles, Energy, Vol. 30, pp. 1013-1078 https://doi.org/10.1016/j.energy.2004.08.005
  2. Chaker M., Meher-Homji C. B., and Mee III T., 2004, Inlet fogging of gas turbine engines - Part I: Fog droplet thermodynamics, heat transfer and practical considerations, ASME J. of Engineering for Gas Turbines and Power, Vol. 126, pp. 545-558 https://doi.org/10.1115/1.1712981
  3. White A. J. and Meacock A. J., 2004, An evaluation of the effects of water injection on compressor performance, ASME J. of Eng. Gas Turbines and Power, Vol. 126, pp. 748-754 https://doi.org/10.1115/1.1765125
  4. Kim K. H. and Perez-Blanco H., 2006, An assessment of high-fogging potential for enhanced compressor performance, ASME paper No. GT2006-90482, Barcelona
  5. Perez-Blanco H., Kim K. H., and Ream S., 2007, Evaporatively-cooled compression using a highpressure refrigerant, Applied Energy, Vol. 84, pp. 1028-1043 https://doi.org/10.1016/j.apenergy.2007.02.013
  6. Kim K. H. and Perez-Blanco H., 2007, Potential of regenerative gas-turbine systems with high fogging compression, Applied Energy, Vol. 84, pp. 16-28 https://doi.org/10.1016/j.apenergy.2006.04.008
  7. Bassily A. M., 2001, Effects of evaporative inlet and aftercooling on the recuperated gas turbine cycle, Applied Thermal Eng., Vol. 21, pp. 1875-1890 https://doi.org/10.1016/S1359-4311(01)00054-0
  8. Nishida K., Takagi T., and Kinoshita S., 2005, Regenerative steam-injection gas-turbine systems, Applied Energy, Vol. 81, pp. 231-246 https://doi.org/10.1016/j.apenergy.2004.08.002
  9. Kim K. H., Kim S. W., and Ko H.-1., 2009, Performance analysis of regenerative gas turbine system with afterfogging, Korean J. Air-Conditioning and Refrigeration, Vol. 21, No.8, pp. 448-455
  10. Cengel Y. A. and Boles M. A., 2006, Thermodynamics. An engineering approach, 5th Ed., McGraw-Hill
  11. Cengel Y., 2006, Heat and mass transfer. A practical approach, 3rd Ed., McGraw-Hill
  12. Jeon M. S., Lee J. J., and Kim T. S., 2009, Analysis of performance enhancement of a microturbine by water injection, J. Fluid Machinery, Vol. 12, No. 2, pp. 46-51 https://doi.org/10.5293/KFMA.2009.12.2.046