Energy, exergy, environmental and sustainability assessments of jet and hydrogen fueled military turbojet engine

Balli O., ÇALIŞKAN H.

International Journal of Hydrogen Energy, vol.47, no.62, pp.26728-26745, 2022 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 47 Issue: 62
  • Publication Date: 2022
  • Doi Number: 10.1016/j.ijhydene.2022.04.180
  • Journal Name: International Journal of Hydrogen Energy
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Artic & Antarctic Regions, Chemical Abstracts Core, Communication Abstracts, Environment Index, INSPEC
  • Page Numbers: pp.26728-26745
  • Keywords: Environmental assessment, Exergy, Fuel, Hydrogen, Thermodynamic analysis, Turbojet engine
  • Uşak University Affiliated: Yes

Abstract

In this study, energy, exergy, environmental and sustainability assessments of jet and hydrogen (H2) fueled J79-GE-17 turbojet engine are done. The results are compared for hydrogen and JP-8 fueled modes. It is found that aviation performance metrics are better for hydrogen utilization mode. By using hydrogen fuel instead of JP-8 fuel; the specific thrust and power rates reduce 1.037%, the specific fuel consumption decreases 63.987% the energy efficiency of the turbojet engine reduces from 30.293% to 29.979%, the exergy efficiency of the combustion chamber component increases 10.581%, and the turbojet engine exergy efficiency rises from 28.54% to 30.73%. The sustainability of the hydrogen fuel utilization for the J79-GE-17 turbojet engine is higher than JP-8 fuel utilization mode. The hydrogen utilization decreases the emission index as 73.36% and the environmental impact as 99.05% comparing to JP-8 usage mode. As a result, hydrogen fuel utilization in this engine is a better choice for emissions and environment, while it can be used as effective as JP-8 fuel.