The propeller engine led aviation to one of his early achievements. Those initial noisy engines were soon replaced by turbojets, although less noise, are insatiable consumers of fuel. The high costs of this are now pressing the airlines to look for greener alternatives.
Rolls-Royce has redesigned the historic technology, making it less noisy and more energy efficient.
The company says the new rotor design can lower the bill for fuel for airlines about $ 3 million and reduce CO2 emissions by 10,000 tons per year and aircraft, in devices between 100 and 200 seats.
several years now turboprop engines experienced a renaissance that was not beyond largely because they were more noisy. The greater involvement with the environment is leading aeronautical engineers that the engine "open rotor" have a new opportunity.
Noise reduction is achieved by adding more blades to rotors and changing its shape, which is thinned. The company claims that this is achieved by rotating operating at lower speeds, reducing noise while maintaining a high eficiencia.Y the improvement is more remarkable because the new design uses two propellers near the rear of the engine that rotate in opposite directions, reducing consumption and the second group of propeller receives air from the first recovering energy and producing more force.
Rolls-Royce is not alone in this innovative project, General Electric, Pratt & Whitney and Snecma are also working on prototypes of a helix.
Air transportation produces about 2-3% of total CO2 emissions and the distances traveled by passengers increasing at a rate of 6-7% annually. This means that in a long-haul travel, aviation introducing cleaner technology, it provides a great impact.
also seems clear that, whenever possible, is preferable to improve the existing technology as the implementation cost is much less than that required by major changes, often because of the hindrance observed in updates very convenient and healthy global society (and I think in the hydrogen car, without going further). And, remember: oil, wherever you are, is a worldwide resource to exploit a few, but when it's over, end for everyone. The air, meanwhile, is a common good that we are obliged to share.
Via: Ecogeek
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