Luz-Silveira, J. [UNESP]Beyene, A.Leal, E. M. [UNESP]Santana, J. A. [UNESP]Okada, D. [UNESP]2014-05-272014-05-272002-09-01Applied Thermal Engineering, v. 22, n. 13, p. 1471-1483, 2002.1359-4311http://hdl.handle.net/11449/66960In this paper, a thermoeconomic analysis method based on the First and the Second Law of Thermodynamics and applied to analyse the replacement of an equipment of a cogeneration system is presented. The cogeneration system consists of a gas turbine linked to a waste boiler. The electrical demand of the campus is approximately 9 MW but the cogen system generates approximately one third of the university requirement as well as 1.764 kg/s of saturated steam (at 0.861 MPa), approximately, from a single fuel source. The energy-economic study showed that the best system, based on pay-back period and based on the maximum savings (in 10 years), was the system that used the gas turbine M1T-06 of Kawasaki Heavy Industries and the system that used the gas turbine CCS7 of Hitachi Zosen, respectively. The exergy-economic study showed that the best system, which has the lowest EMC, was the system that used the gas turbine ASE50 of Allied Signal. © 2002 Elsevier Science Ltd. All rights reserved.1471-1483engCogenerationEnergy-economic analysisExergetic manufacturing costGas turbineApproximation theoryBoilersGas turbinesThermodynamicsCogeneration productsCogeneration plantsArtigo10.1016/S1359-4311(02)00064-9Acesso restrito2-s2.0-0036723291