Imagine roaming the streets on a hot day, protected by the sun in a street-level microclimate induced by thin sheets of plastic stretched between buildings. That plastic is made from recycled plastic bottles, and also produces electricity and hot water.
It does so by concentrating sunlight through a Fresnel lens and is typically used in a lighthouse, onto a pipe covered in photovoltaic cells, or small solar panels.
“Using our technology, you can reduce the number of PV cells you need by a factor of 10,” says engineering consultant Mike Sassoon, who co-founded Living Solar with Yakir Tadmor. “This lowers the cost of this entire operation, since the major cost [is] those PV cells. People need hot water the same as they need electricity.”
This solution allows a change from the typical solar panel arrangement in Israel, where solar panels link to a PV cell farm way out in the desert. Living Solar hopes to bring the entire solar energy process closer to home.
“The idea is that when electricity and hot water are produced very close to the point of use, and you get shade as well, the whole package looks a lot more attractive than the conventional approach, and is also suitable for the Middle East with its dense housing,” says Tadmor.
This lightweight canopy would be large enough to cover the roof of an entire apartment building, so three- or four-stories tall, or 40-meters long by 20 meters wide, which would then extend out over the street. Sunlight would pass through in the form of long wavelength light, which is spread and easy on the eyes.
The birth of Living Solar:
Tadmor and Sassoon met at a college of engineering in Karmiel in northern Israel, where Tadmor has studied mechanical engineering for the past few years. During his internship, he worked with Sassoon, who’s been an energy consultant for over 30 years.
“I never thought I’d become an entrepreneur,” says Tadmor. “But I grew up in Haifa, Israel, which is considered a ‘green city’. There were a lot of trees and greenery everywhere, and a lot of green technology. Growing up, I saw it all around me, so it was natural for me to be interested in helping the planet.”
Living Solar is still in its early years; the two are working on developing a prototype which they can use to secure further funding.
“We’re building a proof of concept to show how much electricity and water you can get,” says Sassoon. “We also want to provide information on how much it will cost. After we develop a prototype, we’ll move onto a pilot project.”
The pilot project will be to create a small piece of this fabric, one that’s 5×5 or 10×10 meters, to test out the concept.
“Once we get to that stage, we’ll be in a position to grow commercially,” says Sassoon. “We’ll be an alternative to the companies that build huge solar farms in the desert. That type of infrastructure is expensive and uses much land. Instead, we’d use the real estate that’s right here on the streets, up on the roof. It will feel just like sitting under a tree.”