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How to Drive an Electric Toothbrush
William J. Mitchell and the members of the MIT Smart Cities research group are creating innovative ways to change how we live in urban areas through, in part, the application of new technologies that enable urban energy efficiency and sustainability, and enhance opportunity, equity, and cultural creativity. Smart Cities research is particularly concerned with the emerging roles of networked intelligence in fabrication and construction, urban mobility, building design and intelligently responsive operation, and public space. The group explores the new forms and functions of cities in the digital electronic era, and suggests design and planning directions for the future.
Question: What are the implications for the electric grid when it comes to implementing these large-scale systems?
Bill Mitchell: One of the problems in transforming any kind of large-scale system is what I like to think of, let’s call horseless carriage thinking. Even the term sort of suggests to you what I’m talking about here. So, when the horseless carriage replaced the horse and carriage, essentially it was a kind of substitution, you take out the horse and put in an internal combustion engine. And then the way people tended to think about electric automobiles as you take out the internal combustion engine and you stick in a hybrid power train, or you stick in a battery electric system. And I think you have to step back and say, no, the real potential is to fundamentally rethink the way things work. So part of the fundamental rethinking that I think is necessary with electric vehicles is to get away from the old idea that you fill a vehicle up with fairly large amount of energy and drive it around for quite a long time and then fill it up again, which is the gas station model. Right? And so people have taken that over into thinking about batteries, right? To charge up the batteries and then you drive around for a long time and then you charge them up again.
Our view is quite different. I am going to glide over some fairly complex technical issues here, but the basic idea here is to recharge every time you park. So I think of parking spaces as being like the holder of your electric toothbrush. You know, you drop your electric toothbrush back in the holder and it automatically recharges. And you never think about recharging the toothbrush and it’s never without charge because whenever you are not using it, it’s just picking up charge. So, imagine a kind of system where you have lightweight electric vehicles relatively small battery capacity, and then picking up charge wherever they park. So, that is an interesting user model you can begin to understand from a user’s point of view how that can work. You never have to worry about filling up your car, never go to the gas station, never plug it in, never do any of these things.
From the point of view of sustainability and the electric grid it has a whole other set of advantages because if you do this, you throw a lot of battery storage capacity into the electric grid. Part of the problem with electric grids is they don’t have a lot of storage capacity; usually they don’t have any storage capacity, which means you have a problem with peak loading. And once again, it’s a balancing problem. You have to size the grid to deal with that hot summer day when everybody has turned their air conditioning on. But the rest of the time you have over capacity if you size it for that. This is oversimplifying a complex issue. But you get the idea.
And then there is also a problem with the intermittency. Clean power sources like solar and wind particularly don’t necessarily supply electricity when you need it. The wind doesn’t necessarily blow when you want the electricity, the sun doesn’t necessarily shine. But if you have storage capacity in the grid and then you set it up so that automobiles can buy and sell electricity from their battery’s storage, they become little energy traders essentially. This gives you a mechanism for balancing the electrical grid and for making clean that intermittent power sources as much more cost effective. So, you see with all of these issues, I think you have to look at them from multiple points of view simultaneously. So, from one point of view, the strategy of electric charging we’re looking at is just convenience, for the convenience of the user. From another point of view, it’s a strategy for making the grid much more friendly to clean, green electric sources. You always want to look for these win, wins in design.
Recorded on January 21, 2010
Bill Mitchell envisions cars that you’ll never have to worry about filling up or plugging in.
Educators and administrators must build new supports for faculty and student success in a world where the classroom might become virtual in the blink of an eye.
- If you or someone you know is attending school remotely, you are more than likely learning through emergency remote instruction, which is not the same as online learning, write Rich DeMillo and Steve Harmon.
- Education institutions must properly define and understand the difference between a course that is designed from inception to be taught in an online format and a course that has been rapidly converted to be offered to remote students.
- In a future involving more online instruction than any of us ever imagined, it will be crucial to meticulously design factors like learner navigation, interactive recordings, feedback loops, exams and office hours in order to maximize learning potential within the virtual environment.
Placing science and religion at opposite ends of the belief spectrum is to ignore their unique purposes.
- Science and religion (fact versus faith) are often seen as two incongruous groups. When you consider the purpose of each and the questions that they seek to answer, the comparison becomes less black and white.
- This video features religious scholars, a primatologist, a neuroendocrinologist, a comedian, and other brilliant minds considering, among other things, the evolutionary function that religion serves, the power of symbols, and the human need to learn, explore, and know the world around us so that it becomes a less scary place.
- "I think most people are actually kind of comfortable with the idea that science is a reliable way to learn about nature, but it's not the whole story and there's a place also for religion, for faith, for theology, for philosophy," says Francis Collins, American geneticist and director of the National Institutes of Health (NIH). "But that harmony perspective doesn't get as much attention. Nobody is as interested in harmony as they are in conflict."
Studying voice recordings of infected but asymptomatic people reveals potential indicators of Covid-19.
A leading British space scientist thinks there is life under the ice sheets of Europa.
- A British scientist named Professor Monica Grady recently came out in support of extraterrestrial life on Europa.
- Europa, the sixth largest moon in the solar system, may have favorable conditions for life under its miles of ice.
- The moon is one of Jupiter's 79.
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A study finds people are more influenced by what the other party says than their own. What gives?
- A new study has found evidence suggesting that conservative climate skepticism is driven by reactions to liberal support for science.
- This was determined both by comparing polling data to records of cues given by leaders, and through a survey.
- The findings could lead to new methods of influencing public opinion.