Monday, January 10, 2011

A shark inspires an artist to build a new hydropower generator

Testing at the Marine Hydrodynamics Lab proves the concept and gets its creator into the tow tank

The artist’s hair was wet, and he apologized for shivering. When I met Anthony Reale, he had just popped out of a tank of 60-degree water at the University of Michigan's Marine Hydrodynamics Lab.

This was the seventh time in three days he’d emerged from the chilly basin. The last four times, he wore a dry suit he borrowed from friends. But the first three dives he did in jeans and a t-shirt. He had no other choice.

Anthony Reale plunges into the tow tank to adjust his prototype.
A weld had broken on a gear of the prototype hydro-powered generator he’d designed and built, inspired by a documentary about a shark that swims with its mouth open. The hydro lab was testing the device. If he couldn’t fix it, he couldn’t test.

“It took me 711 hours and 4,800 boards of wood to build my Strait Power,” Reale said. “Nothing was going to stop me from testing.”

Reale is not an engineer. In December, he finished an art degree at the College for Creative Studies (CCS) in Detroit. The Michigan native got his bachelor’s in product design.

Strait Power, his studio project, is modeled after the basking shark. The fish swims with its mouth gaping, filtering water through its gills to catch bits of food. This filtering creates a slipstream that makes it easier for the shark to glide through the water.

Reale spent hours sketching the muscles of the fish's mouth to memorize its shape. Then he designed a machine that, like the fish, compresses and speeds up the flow of the water around it to extract more energy out of it.

The Strait Power prototype
He collaborated on the project with U-M researchers who had been working on something similar to power remote research camps in Alaska, where they travel each spring to monitor the ecosystem. Despite that the camps tend to be near rivers, they have historically kept the lights on with gasoline or propane generators. Hydropower would be safer and better for the environment, says hydro lab director Guy Meadows, a professor in the Department of Naval Architecture and Marine Engineering.

In December, in the lab’s 100-yard-long, 22-foot-wide, 10-foot-deep tow tank, the first rounds of testing took place. They went well. Reale says his design improves the efficiency of a single turbine blade by 40 percent. A patent is pending.

Meadows is looking into taking the turbine to Alaska in the spring for field tests. And Reale envisions units suspended in the Detroit River, powering the Motor City.

“This,” Reale says, “is my art.”

In this in-depth video from Reale, he shows and explains the whole process of building and testing Strait Power. He updates his progress at the Strait Power blog.

1 comment:

  1. Ms. Moore,

    I am inquiring about permission to use the picture of The Strait Power prototype that is featured in your blog post. I am currently putting together an iBook on the topic of biomimicry and would like to use this picture of Anthony Reale's Strait Power design. Please contact me if you are willing to grant me permission to use this picture in this way. If you do not own the rights to this picture, will you please point me to the person who provided you with this picture. Thank you for your help and your time.


    Wesley Steen