Exergy is a sexy word (maybe only to energy nerds), but it represents a vital class of measures and opportunities as we sprint head-on into the game changer (cliché alert) that will be the post-gravy-train-of-lighting-retrofit-era of energy efficiency. Pay attention!Exergy, also known as availability, is the total useful energy that can be captured before a system comes into equilibrium with the surroundings. Equilibrium can be as simple as a mass coming to rest. Potential Energy Consider a hydropower plant. The potential energy is in the form of elevated water on one side, the reservoir, and a shallow stream for whitewater…
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