Evaluating energy systems using resource exergy analysis (REA) is key to ensure that climate targets are reached in time.
The reason for this effect is wastefulness. Wastefulness, even in otherwise GHG-free energy systems, increases the amount of energy required to cover the total energy demand. If using GHG-free energy systems wastefulness leads to reduced availability of GHG-free energy for the rest of the energy system. Since the energy demand is largely independent of energy production, wastefulness increases overall fossil fuel use.
REA allows to assess wastefulness comprehensively and thus obtain a key indicator in addition to GHG emissions, that is grounded in science, namely resource exergy consumption.
This publication provides guidelines to the application of resource exergy analysis (REA) with a focus on energy systems evaluation.
REA is a well-tested application of exergy analysis to the field of technology comparison that can replace the less comprehensive primary energy analysis and reduce the risk of suboptimal decisions.