When rising energy costs threatened to close a local ice rink, a waste heat recycling system was designed that paid back in 24 months while extending equipment life and saving millions of gallons of water.
Audits tend to conclude with calculated or estimated savings based on little hard data, often biased toward capital improvements sold by the auditor. Capital projects should be the last step in any energy savings effort, not the primary objective.
I was talking with John, the operator at the ice storage plant. Was he ever glad he had this ice storage plant; it was going to save him a fortune! Then I said to him, “Excuse me, I must be missing something. It appears that there is no ice in the ice storage tank.”
You can’t calculate ROI of a metering system any more precisely than you can for a financial accounting system, but experience shows energy monitoring always leads to reducing consumption by 10 to 20 percent or more.
Engineers should use theory – the physics and modeling of equipment and systems – to uncover the possibilities for higher efficiencies. But to achieve them in the real world takes constant energy monitoring, training, and incentives.