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wasted energy

Robert Moses Niagara Power Plant

Exergy, Easy – Heavy Savings

By Energy Rant No Comments
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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The State of Program Evaluation and Tips for Picking Good Evaluation Practitioners

By Energy Efficiency, Energy Rant One Comment
This post is brought to you by the International Energy Program Evaluation Conference (IEPEC), circa 19, er 2015.  I moderated one session featuring four great papers and presentations concerning residential space heating and cooling.  I also observed one concurrent session for nearly all the timeslots in the conference.  The theme I found, which was very pleasing to me, is that doing useful research and evaluation is challenging and expensive. The reason it pleases me is that, well, getting things right is everything, but it also levels the playing field.  I hate losing bids, but it is less painful to lose…
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Upside Down Consequence of EE?

By Energy Efficiency, Energy Rant, LEED, Sustainability, Utility Stuff 2 Comments
Many posts ago, I wrote “The More You Spend, The More You Save” explaining how poor system control wastes energy but results in even greater energy savings for efficient equipment.  For example, consider an air handling system that wastes heating energy provided by an efficient boiler.  The boiler saves x% versus a conventional model, so x% multiplied by greater use (wasted energy) results in “more” savings. Recently I picked up on buzz that argues greater efficiency results in greater energy consumption.  At one point I recall reading in the Wall Street Journal an editorial that argued more efficient vehicles just…
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