Two graduate students at MIT's School of Architecture and Planning want to harvest the energy of human movement in urban settings, like commuters in a train station or fans at a concert...
The so-called "Crowd Farm," as envisioned by James Graham and Thaddeus Jusczyk, both M.Arch candidates, would turn the mechanical energy of people walking or jumping into a source of electricity. Their proposal took first place in the Japan-based Holcim Foundation's Sustainable Construction competition this year.
A Crowd Farm in Boston's South Station railway terminal would work like this: A responsive sub-flooring system made up of blocks that depress slightly under the force of human steps would be installed beneath the station's main lobby. The slippage of the blocks against one another as people walked would generate power through the principle of the dynamo, a device that converts the energy of motion into that of an electric current.
The electric current generated by the Crowd Farm could then be used for educational purposes, such as lighting up a sign about energy. "We want people to understand the direct relationship between their movement and the energy produced," says Juscyzk.
The Crowd Farm is not intended for home use. According to Graham and Jusczy, a single human step can only power two 60W light bulbs for one flickering second. But get a crowd in motion, multiply that single step by 28,527 steps, for example, and the result is enough energy to power a moving train for one second.
And while the farm is an urban vision, the dynamo-floor principle can also be applied to capturing energy at places like rock concerts, too. "Greater movement of people could make the music louder," suggests Jurcyzk.
The students' test case, displayed at the Venice Biennale and in a train station in Torino, Italy, was a prototype stool that exploits the passive act of sitting to generate power. The weight of the body on the seat causes a flywheel to spin, which powers a dynamo that, in turn, lights four LEDs.
"People tended to be delighted by sitting on the stool and would get up and down repeatedly," recalls Graham.
Other people have developed piezo-electric (mechanical-to-electrical) surfaces in the past, but the Crowd Farm has the potential to redefine urban space by adding a sense of fluidity and encouraging people to activate spaces with their movement.
"Our intention was to think of it not as a high-tech mat that would be laid down somewhere, but to really integrate it into a new sort of building system," Graham says.
The Crowd Farm floor is composed of standard parts that are easily replicated but it is expensive to produce at this stage, they said. "Only through experimentation - which can be expensive - do technologies become practical," Graham says.
Graham and Juscyzk rely on bicycles, rather than trains or buses, for their commute to MIT. But, both students were impressed enough by recent experiences in large crowds - for Graham, the 2003 New York City blackout; for Juscyzk, Boston's World Cup celebration in City Hall Plaza - to start work on the Farm. The students were inspired as well by an "ingenious little device by Thomas Edison. When visitors came to his house, they passed through a turnstile that pumped water into his holding tank," says Graham. In addition, they were guided by their advisor, Associate Professor J. Meejin Yoon, who helped them take their proposal from the power-stool to the Crowd Farm.
8 Comments
Why aren't they thinking about starting a gym businesses? That's a lot of direct energy to be harvested + the weight loss. Here I said it.
everytime i hear this type of talk i think first gilligan on the bamboo bicycle riding for mr. howell and then i fall into the matrix scene with all the human batteries
Hong Kong's "California Fitness" clubs are powered by the users, via the exercise machines.
congrats James and Thad!
i think many of the new generation of exercise machines power themselves through the activity of the user--it would be wonderful if the excess energy generated (like the HK clubs) actually went to the grid or the gym building and that fraction of energy you, the user generated was credited back to your account...or if it actually went against your electrical bill--talk about motivation.
That's what the HK clubs are trying out. According to the mathematicians(?) in the comments sections of this Engadget post, however, it's not going to make much of a difference.
Let´s do the math. - Anyone withe basics in chemistry knows that 4,400 l translate to roughly 8.8 kg of CO2. (per year !)
The average american car emits roughly 300g/mile of CO2.
In other words: drive your car 30 miles less PER YEAR (and walk instead), and you save the same amount of CO2.
If your gym is three mils from your home, you just need to walk to the gym 5 times per year. (Do the distance jogging, and you can even save the gym membership) ;)
in my opinion it's the equivalent to drinking diet soda to try to be healthier.
Woohoo!!
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