Jan 18, 2011

Biofuel for Aircrafts


Lufthansa first airline to use Biofuel on passenger flights

There have been quite a few airlines testing out different biofuels, but none that have run biofuels on a long-term basis during scheduled passenger service. Starting in April 2011, Lufthansa will start a six month trial using an Airbus A321 on scheduled flights between Hamburg and Frankfurt using biofuel.
Only one of the A321′s engines will be using a 50-50 mix of biofuel and normal aviation fuel. They hope to use this six months to see how the use of biofuel will affect maintenance and engine life. The A321 will have a unique set up since it will only fly this route and only be fueled in Hamburg. Normally aircraft are used on different routes and can be fueled at almost any airport.
During the six month trial, Lufthansa expects to save about 1,500 tons of CO2 emissions. “Lufthansa will be the world’s first airline to utilize biofuel in flight operations within the framework of a long-term trial. This is a further consistent step in a proven sustainability strategy, which Lufthansa has for many years successfully pursued and implemented,” said Lufthansa Chief Wolfgang Mayrhuber.
This project, that Lufthansa is calling “burnFAIR,” is being funded in part by the German government. The government is investing about $3.3 million (2.5 million Euros) into the project, where Lufthansa is investing about $8.7 million (6.6 million Euros). The goal is to find a viable alternative to standard aviation fuel that can power  airlines around the world with less emissions and be sustainable.
The use of biofuel is one element in a four-pillar strategy aimed at reducing overall emissions in air traffic at Lufthansa. Environmental goals can only be achieved in the future with a combination of various measures, like ongoing fleet renewal, operational measures such as engine washing and infrastructural improvements. Cheers to Lufthansa taking this next step, I will be very interested to see how it works out.



________________________________________________________________________________

About Biofuels
Researchers at the DLR Institute of Combustion Technology in Stuttgart are developing new fuels for the aviation industry. By 2030, for instance, oil-based kerosene could be replaced by fuels produced entirely from biomass. At the same time, the liquids are to be so tailored to combustion in aircraft engines, that they reliably supply more performance at lower levels of emissions and soot.

On the path towards the optimal, as climate neutral as possible designer kerosene, the team of approximately 20 researchers around Institute Director Professor Dr. Manfred Aigner uses test stands such as a high pressure burner or a so-called shock tube. The experiments are accompanied by computer models to coherently simulate the entire reaction sequence during a combustion process. “We can influence up to 50 different parameters such as, for example, ignitability, in order to obtain a fuel that is better than the kerosene licensed these days”, says Aigner. The basis for synthetic fuels is the “Fischer-Tropsch synthesis” invented already in the 1920s in Germany. With this method, natural gas (GtL: gas to liquid) initially can be converted into synthesis gas by adding oxygen and water vapour and in a next step into liquid carbon hydrides. Instead of natural gas, one can also use coal (CtL: coal to liquid) or biomass (BtL: biomass to liquid) as a substitute for oil. The work of the Stuttgart researchers is followed internationally with great interest. Currently, they are working on a plan for alternative fuels together with partners in the EU project ALFA-BIRD. In addition, there are numerous cooperations with, amongst others, Shell, Rolls-Royce and the technology centre Qatar Science & Technology Park.

Jan 12, 2011

RYANAIR: fuel shortages



Low-cost? 

Your safety shouldn't be that cheap.






Ryanair pilots have denounced as “insane” attempts to pressurise them into flying with less fuel by imposing a cap on their safety reserves.
The low-cost airline is saving money by curbing the discretionary rights of pilots to request extra fuel.
The disclosure, made in internal company documents seen by The Sunday Times, has led to claims that the safety of passengers is being compromised as the price of oil soars.
Details of Ryanair’s policies emerged as the Civil Aviation Authority revealed that the number of emergencies declared in British airspace because of fuel shortages had doubled in five years. Last year, 27 planes were given the right to make priority landings, up from 11 in 2003.
There were also 18 “May-days” caused by fuel shortages in the same period, when British airports had to go on an emergency footing with fire engines on the runway.
Under European rules, every plane must carry a “contingency” load of about 5% of a trip’s fuel, and enough to divert to an alternative airport. Across the airline industry, captains also have a duty to anticipate delays from headwinds, storms and rerouting, and to request extra fuel to cope with this.
Pilots at Ryanair, Europe’s largest low-cost airline, must now abide by a limit of 300kg of extra fuel, costing £180. This provides about five minutes of extra stacking time for a Boeing 737.
Evan Cullen, a pilot with 19 years’ experience and president of the Irish Air Line Pilots’ Association, said commercial pressure on pilots to pare down the fuel they carry was compromising safety.
The internal Ryanair memo, sent to pilots in May, reveals that the company insisted that any request by a captain for extra fuel should be the “exception”. It referred to the 300kg maximum.
The memo shows that Ryanair is issuing warning letters to pilots who request extra fuel without explanation. Pilots claim such letters can be used in disciplinary proceedings.
The pilots have responded by complaining in anonymous postings on the Ryanair European Pilots’ Association website.
One says: “It is insane to push pilots to fly with the minimum fuel and take the risk of ending with a low fuel situation and maybe no place to go because the only diversion airport within reach will be mobbed by other aeroplanes.”
Pilots say Ryanair ranks them according to how much extra fuel they use. A spokesman for the airline rejected the pilots’ claims as “anonymous, unverified and inaccurate”. He said: “No pilot is allowed to fly with minimum fuel as these clowns claim.”
He admitted, however, that pilots were allowed extra fuel only in “exceptional cases”. He said Ryanair had suffered one Mayday in the past three years caused by fuel shortages.




http://business.timesonline.co.uk/tol/business/industry_sectors/transport/article4641399.ece
________________________________________________________________________________


Incident: Ryanair B738 at Alicante and Valencia on May 14th 2010, fuel emergency


A Ryanair Boeing 737-800, registration EI-DYX performing flight FR-8384 from London Stansted,EN (UK) to Alicante,SP (Spain), was on approach to Alicante's runway 10 but went around due to weather conditions. The crew subsequently attempted an approach to runway 28 but went around again due to winds and decided to divert to Valencia (72nm north of Alicante) declaring PAN being below the final fuel reserve. While on approach to Valencia the crew declared MAYDAY and performed a safe landing on Valencia's runway 12.

The Spanish CIAIAC reported, that following the landing in Valencia remaining fuel was measured: 440kg of fuel were found in tank 1 (left hand), 470kg in tank 2 (right hand) and 0kg in center tank. The airplane was refueled and continued to Alicante. An investigation has been initiated.

The airplane reached Alicante with a delay of 2:25 hours.