An appraisal method of exergy cost minimisation for co-generation systems
by Katsumi Sugimoto, Terushige Fujii, Junichi Ohta
International Journal of Exergy (IJEX), Vol. 3, No. 3, 2006

Abstract: This study introduces an exergy cost-minimisation appraisal method for a simple gas turbine co-generation system. Optimisation of a gas turbine co-generation system of the electric output class of 17 MW is examined for a variety of turbine inlet temperatures of 950–1,300°C. An optimum value of the turbine inlet temperature exists for exergy cost minimisation and is estimated to be 1,200°C since the manufacturing price of the gas turbine increases greatly above 1,300°C. This fact shows that the rising manufacturing cost of the gas turbine constitutes an important effect for future development of higher temperature systems.

Online publication date: Wed, 10-May-2006

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