Innovations
Vol. 8 (2020), Issue 1, pg(s) 37-40

INNOVATIVE SOLUTIONS

Energy (isentropic) analysis of three-cylinder steam turbine with re-heating

  • 1 Faculty of Engineering, University of Rijeka, Rijeka, Croatia

Abstract

In this paper is presented energy (isentropic) analysis of high power, three-cylinder steam turbine with steam re-heating. A comparison of real (polytropic) and ideal (isentropic) steam expansion processes at nominal load show that observed turbine develops real power of 655.35 MW, while in ideal situation it can develop 716.18 MW. The highest energy loss and the lowest energy efficiency occur in the high pressure turbine cylinder (25.67 MW and 89.14%), while intermediate pressure cylinder has the highest energy efficiency and the lowest energy loss. The energy efficiency of the whole observed turbine is 91.51%, what is in the expected range for such high power steam turbines at nominal load. Further optimization of this steam turbine will be primarily based on the high pressure cylinder.

Keywords

References

  1. Leyzerovich, A. S.: Steam Turbines for Modern Fossil-Fuel Power Plants, The Fairmont Press, Inc., 2008.
  2. Kostyuk, A., Frolov, V.: Steam and gas turbines, Mir Publishers, Moscow, 1988.
  3. Lorencin, I., Anđelić, N., Mrzljak, V., Car, Z.: Genetic Algorithm Approach to Design of Multi-Layer Perceptron for Combined Cycle Power Plant Electrical Power Output Estimation, Energies 12 (22), 4352, 2019. (doi:10.3390/en12224352)
  4. Mrzljak, V., Mrakovčić, T.: Comparison of COGES and diesel-electric ship propulsion systems, Journal of Maritime & Transportation Sciences-Special edition No. 1, p. 131- 148, 2016. (doi:10.18048/2016-00.131)
  5. Uysal, C., Kurt, H., Kwak H.-Y.: Exergetic and thermoeconomic analyses of a coal-fired power plant, International Journal of Thermal Sciences 117, p. 106-120, 2017. (doi:10.1016/j.ijthermalsci.2017.03.010)
  6. Mrzljak, V., Prpić-Oršić, J., Poljak, I.: Energy Power Losses and Efficiency of Low Power Steam Turbine for the Main Feed Water Pump Drive in the Marine Steam Propulsion System, Journal of Maritime & Transportation Sciences 54 (1), p. 37-51, 2018. (doi:10.18048/2018.54.03)
  7. Mrzljak, V., Poljak, I., Medica-Viola, V.: Dual fuel consumption and efficiency of marine steam generators for the propulsion of LNG carrier, Applied Thermal Engineering 119, p. 331–346, 2017. (doi:10.1016/j.applthermaleng.2017.03.078)
  8. Mrzljak, V., Poljak, I., Medica-Viola, V.: Thermodynamical analysis of high-pressure feed water heater in steam propulsion system during exploitation, Shipbuilding 68 (2), p. 45-61, 2017. (doi:10.21278/brod68204)
  9. Mrzljak, V., Poljak, I., Medica-Viola, V.: Efficiency and losses analysis of low-pressure feed water heater in steam propulsion system during ship maneuvering period, Scientific Journal of Maritime Research 30 (2), p. 133-140, 2016. (doi:10.31217/p.30.2.6)
  10. Medica-Viola, V., Pavković, B., Mrzljak, V.: Numerical model for on-condition monitoring of condenser in coal-fired power plants, International Journal of Heat and Mass Transfer 117, p. 912–923, 2018. (doi:10.1016/j.ijheatmasstransfer.2017.10.047)
  11. Lorencin, I., Anđelić, N., Mrzljak, V., Car, Z.: Exergy analysis of marine steam turbine labyrinth (gland) seals, Scientific Journal of Maritime Research 33 (1), p. 76-83, 2019. (doi:10.31217/p.33.1.8)
  12. Mrzljak, V., Poljak, I., Medica-Viola, V.: Energy and Exergy Efficiency Analysis of Sealing Steam Condenser in Propulsion System of LNG Carrier, International Journal of Maritime Science & Technology "Our Sea" 64 (1), p. 20-25, 2017. (doi:10.17818/NM/2017/1.4)
  13. Kanoğlu, M., Çengel, Y.A., Dincer, I.: Efficiency Evaluation of Energy Systems, Springer Briefs in Energy, Springer, 2012. (doi:10.1007/978-1-4614-2242-6)
  14. Mrzljak, V., Blecich, P., Anđelić, N., Lorencin, I.: Energy and Exergy Analyses of Forced Draft Fan for Marine Steam Propulsion System during Load Change, Journal of Marine Science and Engineering 7 (11), 381, 2019. (doi:10.3390/jmse7110381)
  15. Mrzljak, V., Prpić-Oršić, J., Senčić, T.: Change in Steam Generators Main and Auxiliary Energy Flow Streams During the Load Increase of LNG Carrier Steam Propulsion System, Scientific Journal of Maritime Research 32 (1), p. 121-131, 2018. (doi:10.31217/p.32.1.15)
  16. Ahmadi, G. R., Toghraie, D.: Energy and exergy analysis of Montazeri Steam Power Plant in Iran, Renewable and Sustainable Energy Reviews 56, p. 454–463, 2016. (doi:10.1016/j.rser.2015.11.074)
  17. Fu, P., Wang, N., Wang, L., Morosuk, T., Yang, Y., Tsatsaronis, G.: Performance degradation diagnosis of thermal power plants: A method based on advanced exergy analysis, Energy Conversion and Management 130, p. 219– 229, 2016. (doi:10.1016/j.enconman.2016.10.054)
  18. Lemmon, E.W., Huber, M.L., McLinden, M.O.: NIST reference fluid thermodynamic and transport properties- REFPROP, version 9.0, User’s guide, Colorado, 2010.
  19. Blaţević, S., Mrzljak, V., Anđelić, N., Car, Z.: Comparison of energy flow stream and isentropic method for steam turbine energy analysis, Acta Polytechnica 59 (2), p. 109- 125, 2019. (doi:10.14311/AP.2019.59.0109)
  20. Mrzljak, V., Ţarković, B., Poljak, I.: Fuel mass flow variation in direct injection diesel engine – influence on the change of the main engine operating parameters, Scientific Journal of Maritime Research 31 (2), p. 119-127, 2017. (doi:10.31217/p.31.2.6)
  21. Jamrozik, A.: The effect of the alcohol content in the fuel mixture on the performance and emissions of a direct injection diesel engine fueled with diesel-methanol and diesel-ethanol blends, Energy Conversion and Management 148, p. 461–476, 2017. (doi:10.1016/j.enconman.2017.06.030)
  22. Mrzljak, V., Poljak, I.: Energy Analysis of Main Propulsion Steam Turbine from Conventional LNG Carrier at Three Different Loads, International Journal of Maritime Science & Technology "Our Sea" 66 (1), p. 10-18, 2019. (doi:10.17818/NM/2019/1.2)

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