Making Exergy-Based Sustainability Assessment More Consistent

What is it about?

This paper reviews and compares different methods used in Extended Exergy Accounting (EEA), a framework that evaluates resource use by accounting not only for energy and materials, but also for labour, capital, and environmental impacts in exergy terms. It identifies key methodological problems in existing approaches, such as inconsistencies, lack of data, and double counting, which can lead to very different results. The paper then compares these methods using the Portuguese agriculture, forestry, and fisheries sector from 2000 to 2012 and proposes a new approach—Intrinsic Extended Exergy Accounting (IEEA)—that is more consistent and practical, while avoiding the need for complex databases.

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Photo by ANGELA BENITO on Unsplash

Photo by ANGELA BENITO on Unsplash

Why is it important?

Extended exergy accounting is a powerful tool for assessing sustainability and resource efficiency, but its use has been limited by methodological inconsistencies and unclear assumptions. This paper is important because it clarifies these issues and shows how different ways of accounting for labour, capital, and environmental impacts can significantly affect results. By proposing a more consistent and applicable framework, it helps make exergy-based analysis more reliable and useful for sustainability assessment, policy, and decision-making.