engineering Archives - Michaels Energy

Feb 17

STEM Brilliance for You and Your Kids

By Jeff Ihnen Energy Rant No Comments

It’s been cold here in the Midwest. In ten days in La Crosse, WI, where I am, the average low was -13.7F, average high, 4.3, and the average of averages over the ten days was -4.7F. We smashed one daily record. There have been no all-time lows, but this is a grind. In the middle of this grind,[1] I woke up one morning thinking about greenhouse gases, GHGs. There is very little GHG in this weather because the dominant GHG is water vapor, and below-zero air has almost no capacity to hold water. Then I got to thinking; this is...

Nov 11

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Good, Perfect, and Real Carbon Targets – Finale

By Jeff Ihnen Energy Rant No Comments

In this week's Energy Rant, we're covering the final segment of good, perfect, and real carbon targets. There are two sources of carbon-free energy. First, we have the category of renewable with wind, solar, hydro, and some geothermal. Second, we have nuclear. Oops – third, we have efficiency and demand management. The electricity market is bizarre to me. Last week I crudely explained how the regional transmission authorities (RTO) and their twins, independent system operators (ISO), balance the grid in real-time. Power supplied must match demand with very tight tolerances of voltage and frequency at all times. The chart below...

Nov 04

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Good, Perfect, and Real Carbon Targets – Part 3

By Jeff Ihnen Energy Rant No Comments

In this week's Energy Rant, we're covering part three of good, perfect, and real carbon targets. In Part I of this series, we examined how various storage technologies work, their pluses, and minuses. In Part II, we put numbers to generation and storage technologies, including maximum power, duration of discharge (for storage), cost per megawatt and megawatt-hour to build and operate, and a slew of other great stuff. In Part III, we will size up the numbers from Part II to actual grid demand. The objective is to provide scale to see what we would need to pair high percentages...

Oct 28

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Good, Perfect, and Real Carbon Targets – Part 2

By Jeff Ihnen Energy Rant No Comments

In this week's Energy Rant, we're covering part two of good, perfect, and real carbon targets. Last week we looked at grid-scale energy storage options for a couple of them, namely hydrogen and flywheels; I asked, “What could go wrong?” To be fair, my comment on hydrogen was its use as a buoyant gas to float the Hindenburg. Hydrogen, while very light, is explosively combustible, so putting it in a blimp was crazy. I always like to throw factoids in for budding STEM enthusiasts. Take a helium (non-combustible) balloon on a string, hold it by the string in a moving...

Oct 21

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Good, Perfect, and Real Carbon Targets

By Jeff Ihnen Energy Rant No Comments

I recently delivered an electrification presentation for Wisconsin Public Utility Institute’s Energy Utility Basics course. While introducing myself, I said, "I’m an engineer, and I can’t help it." I also said the answer to the question, “Can we ___?” is always, “Yes, it’s just a matter of money.” That led me to briefly discuss politicians, with no background in the subject, declare that “we” (state, city, etc.) will be powered by 100% renewable energy by 2050. The universe is between here and there. When I hear that renewable electricity is cost-competitive with conventional sources like combined-cycle natural gas or even...

Oct 07

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Phase Change Materials for Grid-Interactive Efficient Buildings (GEBs)!

By Jeff Ihnen Energy Rant No Comments

Last week in Thermal Storage for Grid-Interactive Efficient Buildings (GEBs), I introduced the importance of phase changes from solid to liquid to vapor, and the reverse, to our modern world. Benefits include heating, cooling, and refrigeration for all types of uses, including space conditioning, food storage and transportation, healthcare, manufacturing, and of course, thermal storage. The simplest everyday thermal storage material is ice. Grocery and convenience companies have enormous ice-making facilities for guess what: thermal storage and your lowly Igloo or swanky Yeti coolers. I have a Coleman Lil Oscar cooler that I’ve used since Ha School. Now that is...

Sep 30

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Thermal Storage for Grid-Interactive Efficient Buildings

By Jeff Ihnen Energy Rant No Comments

Aside from efficiency being a core component of my thermos-fluids courses in engineering school, phase changes were also captivating to me. Phase changes from solid (ice) to liquid (water) to vapor (steam) have been used for hundreds of years, and more recently, the last 150 years, give or take, to generate electricity, refrigerate, freeze and keep us cool in the summer heat. Like water, practically anything will freeze, melt or vaporize. Take copper, please. It is widely used to conduct electricity in homes and buildings. It too melts and vaporizes. When it vaporizes, you don’t want to be near it...

Feb 03

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Inch or Mile? Indispensable Thumbs Guide Impact Evaluation

By Jeff Ihnen Energy Rant No Comments

Hi. How’re you? Jeff Ihnen here. I’m back and almost live. I’ve been away on several temporary assignments that are starting to wind down. We are thrusting forth into the 11th year of the Energy Rant! Indispensable Thumbs Unless you have broken one, lost one, or had one immobilized, you probably have no idea of the value of your thumb and its equivalent, the big toe. I’m sitting on an airplane as I bang this out, munching a bag of almonds. Thumb and a finger. Thumb and a finger? That’s how you and I and anyone with a fully functioning...

Jun 17

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Prestige, Not Pain – Efficiency at Home

By Jeff Ihnen Energy Rant 2 Comments

I call your attention to the brilliant marvel of engineering shown in the image below. This model was developed before most of you were born. It is the little diesel engine that could – get 60 mpg, in my second car – a 1984 Ford Escort Diesel. Most people didn’t even know they existed, but as a college sophomore, when I got tired of my crappy, rattling, vibrating, chintzy Mustang, I snapped up this baby for a deep discount from the Billion auto empire in Sioux Falls, SD. There was no air conditioning or power anything, including no power steering....

Jun 03

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Turbulence, Tribes, and Climate Change

By Jeff Ihnen Energy Rant No Comments

The topic of climate change is fascinating to me because I love to learn why people believe what they believe. I wrote last week that climate change policy is firmly and forever intertwined in political warfare. Does anyone stand alone on an island isolated from their tribe on anything? Maybe five out of one hundred on an issue or two, but for the most part, no. This is where I come in – I love stirring the pot. A few months back, a friend forwarded a link to Global Warming for the Two Cultures, by Richard LIndzen, Professor of Meteorology,...

STEM Brilliance for You and Your Kids

Good, Perfect, and Real Carbon Targets – Finale

Good, Perfect, and Real Carbon Targets – Part 3

Good, Perfect, and Real Carbon Targets – Part 2

Good, Perfect, and Real Carbon Targets

Phase Change Materials for Grid-Interactive Efficient Buildings (GEBs)!

Thermal Storage for Grid-Interactive Efficient Buildings

Inch or Mile? Indispensable Thumbs Guide Impact Evaluation

Prestige, Not Pain – Efficiency at Home

Turbulence, Tribes, and Climate Change

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