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kW

Pre and Post kW versus Time

Fly Balls, Fast Drives, And Fault Detection Diagnostics

By Energy Rant No Comments
For those of you who are not doctors or veterinarians for our beloved pets, have you ever been in an exam room when the technician brings in X-RAY results and posts them on the backlit thing and leaves you alone with them before the doctor arrives? I was in this situation a year or two ago. Looking at the image was like reading brail with my eyes – but that doesn’t stop me from trying. Oooh, what is that? Is this a problem? Is that out of whack? The doctor blew over what I was looking at because I was…
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Utility Rate Database

Lithium-Ion Batteries for Commercial Buildings – Pass the Schnapps

By Energy Rant 2 Comments
The batteries are coming! Maybe. I recently participated in an EPA-sponsored webinar to explore the results of a couple of case studies of lithium-ion batteries used to shave and shape building electrical loads. The technology is more nascent or even embryonic than I would have guessed. Interestingly, I’ve read a lot about systems approaches to fighting the COVID – that is, our bodies’ systems to take on and ward off attacks by viruses effectively. I thought, wow, this is where we (Michaels) differentiate ourselves by thinking holistically, beyond the widget. Like many other technologies, such as combined heat and power,…
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PJM

Four Shades of Electrical Demand – A Riveting Cliffhanger

By Energy Rant One Comment
Last week I related electrical demand in kW with electrical energy in kWh. Energy is the area (power times time) under the kW curve. Without cheating, I’ll do an example. Elementary Calculus In energy-nerd world, a curve is a line of any form, including a straight line. Consider the simple ax + b curve on the right, where a is the slope and b is the y-intercept.  The equation is y = 2x +4. C’mon you had this in elementary school. Challenge yourself!If I want the energy consumed from hour two to hour ten, I simply take the integral of…
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Bait and Switch

By Energy Efficiency, Energy Rant, Utility Stuff No Comments
The day after last week’s election, the headlines included discussions about the “fiscal cliff” coming on January 1, 2013, when the “Bush” tax cuts expire and substantial automatic spending cuts kick in.  I guarantee this will not come and go without high drama.  First thing after the election comes the ceremonial token olive branches, and five minutes later both sides return to sharpening their heals and digging in. I would say energy efficiency has it’s own version of the fiscal cliff coming, and that is the end of the gravy train – lighting retrofits – the so-called low hanging fruit,…
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Decoupling, Stupid

By Energy Efficiency, Energy Rant, Utility Stuff 2 Comments
One way the utility business works like the rest of the economy is that it sells its products/commodities at a price that is higher than the cost of production, on average.  The more utilities sell, the greater their gross profit.  This is at odds with utilities’ incentive to save energy with energy efficiency programs.  As a result, some utility executives are opposed to energy efficiency programs.  That is a short-sighted view but that’s a story for a different day. As a result of this dichotomy, a pricing mechanism known as decoupling has been developed.  This NREL paper gives a pretty…
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