Economics at your fingertips  

Exergoenvironmental analysis and optimization of a cogeneration plant system using Multimodal Genetic Algorithm (MGA)

Pouria Ahmadi and Ibrahim Dincer

Energy, 2010, vol. 35, issue 12, 5161-5172

Abstract: In the present work, a combined heat and power plant for cogeneration purposes that produces 50MW of electricity and 33.3kg/s of saturated steam at 13bar is optimized using genetic algorithm. The design parameters of the plant considered are compressor pressure ratio (rAC), compressor isentropic efficiency (ηcomp), gas turbine isentropic efficiency (ηGT), combustion chamber inlet temperature (T3), and turbine inlet temperature (TIT). In addition, to optimally find the optimum design parameters, an exergoeconomic approach is employed. A new objective function, representing total cost rate of the system product including cost rate of each equipment (sum of the operating cost, related to the fuel consumption) and cost rate of environmental impact (NOx and CO) is considered. Finally, the optimal values of decision variables are obtained by minimizing the objective function using evolutionary genetic algorithm. Moreover, the influence of changes in the demanded power on various design parameters are parametrically studied for 50, 60, 70MW of net power output. The results show that for a specific unit cost of fuel, the values of design parameters increase, as the required, with net power output increases. Also, the variations of the optimal decision variables versus unit cost of fuel reveal that by increasing the fuel cost, the pressure ratio, rAC, compressor isentropic efficiency, ηAC, turbine isentropic efficiency, ηGT, and turbine inlet temperature (TIT) increase.

Keywords: Exergoenvironmental optimization; CHP; Exergy; Energy; Efficiency; Genetic algorithm (search for similar items in EconPapers)
Date: 2010
References: View references in EconPapers View complete reference list from CitEc
Citations View citations in EconPapers (24) Track citations by RSS feed

Downloads: (external link)
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link:

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Series data maintained by Dana Niculescu ().

Page updated 2017-09-29
Handle: RePEc:eee:energy:v:35:y:2010:i:12:p:5161-5172