Boiler Parametric Study of Thermal Power Plant to Opproach to Low Irreversibility
American Journal of Energy Engineering
Volume 3, Issue 4, July 2015, Pages: 57-65
Received: May 5, 2015; Accepted: May 17, 2015; Published: Jun. 3, 2015
Views 4496      Downloads 120
Sajjad Arefdehgani, Department of Mechanical engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran
Omid Karimi Sadaghiyani, Department of Mechanical engineering, Urmia Branch, Urmia University, Urmia, Iran
Article Tools
Follow on us
In this work, in order to reach to low irreversibilities, the energy and exergy have been analyzed in the boiler system of Tabriz power plant. First, it has been done to decrease the irreversibility of system. Second, flow and efficiencies of energy and exergy of the mentioned system have been studied. In the boiler, the energy efficiencies based on lower and higher heating value of fuel are 91.54% and 86.17% respectively. In other hand, the exergy efficiency is 43.98%. Comparing with Rosen and et al., it is demonstrated that, results have a logical agreement with experimental data. Accordingly, the EES used code, have been validated. Furthermore, the gas fired steam power plant efficiency has been increased by the use of irreversibilities reduction and diminution of excess combustion air and/ or the stack-gas temperature. Finally, these have been concluded, overall energy and exergy efficiencies of Tabriz power plant increase 0.497% and 0.46%, respectively when the fraction of excess combustion air decreases from 0.4 to 0.15.Also these efficiencies increase 2.196% nearly when, the stack-gas temperature decreases from 159 to 97 °C.
Excess Air, Stack Gas, Exergy Efficiency, Energy Efficiency, Boiler, Tabriz Power Plant
To cite this article
Sajjad Arefdehgani, Omid Karimi Sadaghiyani, Boiler Parametric Study of Thermal Power Plant to Opproach to Low Irreversibility, American Journal of Energy Engineering. Vol. 3, No. 4, 2015, pp. 57-65. doi: 10.11648/j.ajee.20150304.11
Rosen, M.A., Tang, R., Improving steam power plant efficiency through exergy analysis: effects of altering excess combustion air and stack-gas temperature, Int. J. Exergy, 5 (2008), No. 1, pp. 31–51
Dincer, I., Al-Muslim, H., Thermodynamic analysis of reheat cycle steam power plants. Int.J. Energy Res, 25 (2001), pp. 727-739
Gallo, W.L.R., Milanez. L.F., Choice of a reference state for exergetic analysis, Energy, 15 (1990), pp. 113–121
Habib, M.A., Zubair, S.M., Second-law-based thermodynamic analysis of regenerative-reheat Rankine cycle power plants, Energy, 17 (1992), pp. 295–301
Cihan, A., et al., Energy-exergy analysis and modernization suggestions for a combined-cycle power plant. Int. J. Energy Res., 30 (2006), pp. 115–126
Song, T.W., et al., Exergybased performance analysis of the heavy-duty gas turbine in part-load operating conditions, Exergy, 2 (2002), 20, pp. 105–112
ERC, In: How to save energy and money in boilers and furnace systems. Energy Res. Centre (ERC) (2004), University of Cape Town, South Africa
Jayamaha, Lal, In: Energy Efficient Building Systems, Hardbook. Mcgraw Hill education, Europe, 2008.
Cownden, R., et al., Exergy analysis of a fuel cell power system for transportation applications, Exergy, An Int. J. 1 (2001), pp. 112–121
Assari, M. R., et al., Exergy Modeling and Performance Evaluation of Pulp and Paper Production Process of Bagasse, a Case Study, Thermal Science, 18 (2014), 4, pp. 1399-1412
Thavamani, S., et al., Increasing Boiler Efficiency through Intelligent Combustion Optimization, Proceedings, 20th Nuclear Engineering and the ASME 2012 Power Conf., California, USA, 2012, Vol. 4, pp. 753-761
Sonia, Y., et al., a centurial history of technological change and learning curves for pulverized coal-fired utility boilers. Energy, 3 (2008), pp. 1996–2005
Grimaldi, C.N., Bidini, G., Using exergy analysis on circulating fluidised bed boilers, International Journal of Energy, Environment, Economics, 2 (1992), No. 3, pp.205–213.
Rosen, M.A., Dincer, I., Survey of thermodynamic methods to improve the efficiency of coal-fired electricity generation, Proc. Instn Mech. Engrs Part A: J. Power and Energy, 217 (2003a), pp.63–73.
Sciubba, E., Su, T.M., Second law analysis of the steam turbine power cycle: a parametric study, Computer-Aided Engineering of Energy Systems, ASME, AES-Vol. 2–3 (1986), pp.151–165.
[16] Rosen, M.A., Tang, R., Assessing and improving the efficiencies of a steam power plant using exergy analysis. Part 1: assessment, Int. J. Exergy, Vol. 3 (2006a), No. 4, pp.362–376.
Rosen, M.A., Tang, R., Assessing and improving the efficiencies of a steam power plant using exergy analysis. Part 2: improvements from modifying reheat pressure, Int. J. Exergy, Vol. 3 (2006b), No. 4, pp. 377–390.
Cengel, Y.A., Boles, M.A., Thermodynamics: An Engineering Approach, 5th ed., McGraw-Hill, Boston, 2006.
Moran, M.J., Shapiro, H.N., Fundamentals of Engineering Thermodynamics, 5th ed., Wiley, New York, 2003.
Rezac, P., Metghalchi, H., A brief note on the historical evolution and present state of exergy analysis, International Journal of Exergy, Vol. 1 (2004), pp. 426–437.
Kamimura, F., Method and apparatus for treating flue gases from coal combustion using precoat agent with heat exchange, Fuel and Energy Abstracts 38 (1997), pp. 449.
Kitto, J.B., Piepho, J.M., Making aging coal-fired boilers low-cost competitors, Power 139 (1995), No. 12, pp.21–26.
Science Publishing Group
1 Rockefeller Plaza,
10th and 11th Floors,
New York, NY 10020
Tel: (001)347-983-5186