IJEX is dedicated to providing an interdisciplinary platform for information and ideas in the field of exergy and thermodynamic optimisation. It publishes a wide range of original, high-quality research papers, and ancillary features, spanning activities from fundamental research to industrial applications. IJEX covers aspects of exergy analysis of engineering and non-engineering systems and processes in a large variety of disciplines, ranging from mechanical engineering to physics and chemical engineering to industrial ecology.

Topics covered include:
-Thermodynamic systems
-Energy-related applications
-Process optimisation
-Energy systems, policies, planning
-Exergy/environment modelling
-Exergetic life cycle assessment
-Industrial ecology
-Sectoral exergy utilisation
-Waste exergy emissions
-Second-law efficiency
-Thermo- and exergo-economics
-Exergy in sustainable development
-Criticisms of and problems with use of exergy
-Entropy generation minimisation
-Constructal theory and design