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Five green inventions that could make a breakthrough

The international green economy is growing, throwing up plenty of new innovations that offer much promise for increasing energy efficiency, saving water and reducing fuel consumption. Here are five we've spotted recently.

Double-efficiency solar panelDouble-efficiency solar panel - Image credit: Insolight

Swiss experts have come up with the idea of using an optical overlayer to focus the sun's energy onto high-performance solar cells. These cells are expensive, but the design, which is currently being lab-tested with a view to scaling up, means you wouldn't need many of them. Laurent Coulot, from Insolight, the company behind the concept explained: “It’s like a shower: all the water goes down one small drain, there’s no need for the drain to cover the entire floor of the shower."

Image credit: Insolight,

Combined heat and power from the sun2-SOM system- Photo Credit: Crystal Green Energy- Linked In via

It's all about focusing with the Canadian 2-SOM system too. Here, concave mirrors concentrate sunlight towards efficient cells as part of a panel which mechanically tracks the sun. This is not just a solar PV system, though. A heat exchanger uses the high temperatures generated to heat water, making it suitable to provide for a home or business's electricity and warmth needs.

Image credit: Crystal Green Energy- Linked In via

Desalination, energy and art installationDesalination, energy and art installation- Photo credit :

The Californian city of Santa Monica now boasts a truly unique structure off its coast – a shining silver tube that's both a salt water desalination device and energy generator. Its designers claim it can desalinate 1.5billion gallons of water a year, solely using sunlight, while generating 10,000 MWh of electricity. Though a big architectural undertaking, given it tackles multiple resource issues at once with an aesthetic edge, this is a design many coastal cities may well have their eye on.

Image credit:


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An old solution to a new problem

flywheel - Image credit: BIZCOMMUNITY.comA Lancaster University student has gone back to the future in the hope of providing a reliable energy storage option. Abigail Carson has created a modern version of the flywheel, a technology that pre-dates batteries. It stores up kinetic energy through rotation, and this design goes twice as fast as what's currently available, while being 100 per cent recyclable. Definitely one for the traditionalists and the modernists to get behind.

Image credit:

Sweeping away the competition? Hydrogen road sweep- Image credit: WFE via

The world's first hydrogen hybrid road sweeper has just been launched at a conference in Birmingham. It's a Bulgarian design, using hydrogen technology developed at a Sofia armament factory in a new way, and claims fuel consumption savings of 15 per cent, and emissions cuts of up to 80 per cent. With towns and cities looking to tackle air pollution as well as waste, this is sure to be an idea worthy of further investigation.

Image credit: WFE via

What innovations have caught your eye? Let us know. Share your thoughts with us in the comments below, or tweet @EnergySvgTrust

Gary Hartley is Energy Saving Trust's expert blogger. He has extensive experience researching and writing on a number of topics, with particular expertise in sustainable energy, policy, literature and sport. As well as providing regular blog content, Gary has also been published in numerous magazines and journals.

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Article of possible interest:

Researchers develop a polymer similar to that used in soft contact lens to boost the performance of super capacitors. (sc)

“an extremely exciting and potentially game changing development,”

it could boost the energy density of sc by 1,000 to 10,000 times.

“This is a war on energy density,”

Current sc offer about 5 wh per kg.

Lithium-ion batteries offer 100 wh per kg.

Gasoline offers 2,500 wh per kg.

"If this only translates into something 10 times better, that’s still huge.”

“50 watt-hours would do general transportation"