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Exergy Analysis of a Cogeneration Plant

Authors: Derya Burcu Ozkan, Onur Kiziler, Duriye Bilge


Cogeneration may be defined as a system which contains electricity production and regain of the thermo value of exhaust gases simultaneously. The examination is based on the data-s of an active cogeneration plant. This study, it is aimed to determine which component of the system should be revised first to raise the efficiency and decrease the loss of exergy. For this purpose, second law analysis of thermodynamics is applied to each component due to consider the effects of environmental conditions and take the quality of energy into consideration as well as the quantity of it. The exergy balance equations are produced and exergy loss is calculated for each component. 44,44 % loss of exergy in heat exchanger, 29,59 % in combustion chamber, 18,68 % in steam boiler, 5,25 % in gas turbine and 2,03 % in compressor is calculated.

Keywords: Cogeneration, Exergy loss, Second law analysis

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[1] C. Onan, D. Ozkan , S. Erdem " Exergy of a solar assisted absorption cooling system on an hourly basis in villa applications," Energy, vol. 35, pp. 5277-5285, 2010
[2] G Temir, D. Bilge "Thermoeconomic analysis of a trigeneration system," Applied Thermal Engineering, vol. 24, pp. 2689-2699, 2004
[3] YC. Huang, CI. Hung and CK. Chen " Exergy Analysis for a combined system of steam injected gas turbine cogeneration and multiple effect evaporation," Proc IMechE, Part A.Journal of Power and Energy, vol. 214, pp. 61-73, 2000
[4] S. Bandayapadhyay, NC. Bera, S. Bhattacharyya "Thermoeconomic optimization of combined cycle power plants. Energy conversion and management," vol. 42, pp. 359-371, 2001
[5] YH. Kwon, HY. Kwak, SD. Oh. "Exergoeconomic analysis of gas turbine cogeneration systems," Exergy, vol. 1, pp. 31-40, 2001
[6] M. Valdes, MD. Duran, A. Rovira. "Thermoeconomic optimization of combined cycle gas turbine power plants using genetic algorithms," Applied Thermal Engineering, vol. 23(17), pp. 2169-2182, 2003
[7] JL. Silveria, CE. Tuna, "Thermoeconomic analysis method for optimization of combined heat and power systems," Progress in Energy and Combustion Science, vol. 29, pp. 479-485, 2003
[8] A. Bejan, "Advanced Engineering Thermodynamics," NewYork: John Wiley&Sons, 1997
[9] Y. Çengel, M. Boles "Thermodynamics: An Engineering Approach,"McGraw-Hill, 2005