Thermodynamic simulation of a solid oxide fuel cell integrated gas turbine cycle base on irreversibility analysis

Babak Kamkari, Abbas Aliabadi, Alireza Yazdizadeh, Alireza Taklifi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This study examines the performance of a high-temperature solid oxide fuel cell combined with a conventional recuperative gas turbine (GT-SOFC) plant, as well as the irreversibility within the system. Individual models are developed for each component, based on the first and second laws of thermodynamics. The overall system performance is then analyzed by applying thermodynamic laws for the entire cycle, to evaluate the thermal efficiency and entropy production of the plant. The results of an assessment of the cycle for certain operating conditions are compared with conventional cycles. Further outcomes indicate that increasing the turbine inlet temperature results in decreasing the thermal efficiency of the cycle, whereas it improves the net specific power output. Moreover, an increase in either the turbine inlet temperature or compression ratio leads to a higher rate of entropy generation within the plant. It was found that about 58% of the irreversibility takes place in the combustor and SOFC at typical operating condition: 35% in the combustor and 23% in the SOFC. A comparison between the GT-SOFC plant and a traditional GT cycle, by identical operating conditions, is made. Although the irreversibility of a modern plant is higher than that of a conventional cycle, the superior performance of a GT-SOFC over a traditional GT cycle is evident. It has about 28% higher efficiency than a traditional GT plant. In this case, the thermal efficiency of the integrated cycle becomes as high as 61% at the optimum compression ratio.

Original languageEnglish
Title of host publication2011 Proceedings of the 3rd Conference on Thermal Power Plants, CTPP 2011
Publication statusPublished - 2011
Event2011 3rd Conference on Thermal Power Plants, CTPP 2011 - Tehran, Iran, Islamic Republic of
Duration: 18 Oct 201119 Oct 2011

Publication series

Name2011 Proceedings of the 3rd Conference on Thermal Power Plants, CTPP 2011

Conference

Conference2011 3rd Conference on Thermal Power Plants, CTPP 2011
Country/TerritoryIran, Islamic Republic of
CityTehran
Period18/10/1119/10/11

Keywords

  • irreversibility
  • Power turbine
  • SOFC
  • Thermodynamic

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