In a Resource-constrained World: Think Exergy, not Energy

When we think about energy, we consider it in terms of quantity. However, in a resource-constrained world, energy and in particular its efficiency, must also be appreciated from the point of view of quality, which is its ability to do work. In order to include the quality and not just the quantity of energy, we need to measure ‘exergy’. This brochure introduces the concept of exergy and provides examples of its application.