IJEX is a quarterly publication 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. IJEX aims to provide a forum for disseminating high-quality research results in the wide domain covered by the methods of exergy analysis, entropy generation minimisation and thermo-economics. Papers on related topics such as exergy utilisation, irreversible process modelling, size and time constraints, environmental modelling, exergy waste and emissions and exergo-economics are welcome. Also welcome are studies devoted to method, modelling, theory, computational simulation, design, experimentation, and measurement. It is our objective to bring the community together in the forum for IJEX and to expand it. The hope of all of us in thermodynamics is to develop a more coherent science, and to leave for future generations a more useful methodology.