The universe is full of energy, and efforts to harvest that ambient energy are as old as the windmill and sailing ships. The convergence of three exponentially improving technologies, however, is creating striking new opportunities for ambient energy harvesting that can power applications unthinkable only a few years ago. The key to unlocking these opportunities is effectively managing minuscule amounts of power.People are looking for either new source of energy, or by circulating the existing energy to optimized their function in many ways. If you're looking for new source of energy, maybe it quite a difficult because it simply be rare and must be expensive due to the minimum experiments that resulted as the 'not yet' ready product. So, eventually what we should be looking is the alternatives to circulating what already been around us, i.e. electricity, gas, or liquid gas, etc.

The other simply way is just try to conserve it.

The Car That runs on Air
e.Volution car (photo: MDI)
By Carolyn Dempster in Johannesburg

Urban transport could soon be revolutionised with the launching this week in South Africa of a prototype new car which designers say runs on air.

It is being predicted that the e.Volution will be able to travel up to 200km (120 miles) for only 30 US cents.

With petrol and diesel prices going up, and the price of oil subject to fluctuations, motorists might be only too happy to "go green"

The car, which resembles a small minibus, is being promoted by the slogan "Simple, Economic and Clean", but details of how the vehicle will work remain sketchy.

The e.Volution prototype will be unveiled at Auto Africa Expo 2000 in Johannesburg this week and is being touted as the first viable alternative to cars that run on conventional fuels.

Researchers have been working for many years to produce 'eco-friendly' cars, but so far these attempts have not been successful. Some models already in development use hydrogen as a fuel.

It is expected to sell in South Africa for about R74,000 ($10,000) which is on a par with a medium-sized saloon car.


Helen Brown who heads "Zero Pollution Motors", the company which has the rights to manufacture the car locally, says it will be ideal for urban transport.

e.Volution (photo: MDI)
First models to be on the road this year
The compression engine technology was pioneered by a former French formula one engineer Guy Negre, who has spent years searching for an alternative to the traditional oil-fuelled engine.

The piston engine is powered by the release of compressed air which is stored in tanks, very similar to scuba diving tanks, attached to the underside of the car.

The body of the vehicle weighs only 700kg, and the engine itself is a mere 35kg.

This means that the vehicle can theoretically be driven for up to 10 hours in an urban environment at an average speed of 80km/h.

Filling up

The designers of e.Volution say it will be possible to merely plug the vehicle into any electrical power source to fill it up. That could take up to four hours.

It could be a serious challenge to the current motor vehicle market
But the manufacturers envisage that fleet owners could install their own air stations, where a fill up could take as little as three minutes.

If the e.Volution lives up to all the hype, it could offer a serious challenge to the current motor vehicle market.

There are currently two factories in France, with the first models expected on the streets later this year.

There are five factories planned for Mexico and Spain, with three in Australia.

Anti-globalisation idea

But South Africa will be the second country after France to open a factory and begin production.

Helen Brown says her company aims to set up a production line in the province of Gauteng by next year, with the first cars off the production line and onto the salesroom floor by early 2002.

" It's really an anti-globalisation production idea" she said.

"The aim of the project is to cut costs and create jobs locally, serving the consumer market directly."

With petrol and diesel prices going up, and the price of oil subject to fluctuations, the Middle East crisis and occasional shortfalls, motorists might be only too happy to "go green" if it means a lifetime saving on fuel costs.

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