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Monday, 28 March 2011
Tata & MIT System To Use Sunlight To Split Water Into Hydrogen & Oxygen (video)
A criticism often leveled at solar energy is that it is not "base load". i.e. because it only generates electricity in daylight, without storage, it's not available 24/7. Storage is generally expensive &/or inefficient. Numerous schemes have been suggested, but have never reached production apart from for small applications. e.g. lead acid batteries for storage of solar for small communities.
In theory, solar electricity could be used to split water into hydrogen & oxygen. At night, the hydrogen & oxygen could be used directly (e.g. for heating or cooking) or to generate electricity.
In the item below, the system being developed generates hydrogen & oxygen directly from water with greater efficiency than photo voltaic systems.
Shoot For The Stars To Power The Towers
Buildings with a high energy efficiency rating are attracting higher prices & rents:
For better engine efficiency, a different kind of throttle
Limiting the amount of air is the only practical way to throttle an internal combustion engine (ICE). Unfortunately, the throttle in an ICE has long been recognised as a source of ineffciency, due to pumping losses. A more efficient, though expensive, alternative is to control air intake using the valves. Efficiency gains are in the range of 10%.
/ valve FIAT MultiAir microprocessors pumping loss /
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