Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Russian fuel flows in Jules Verne’s veins

15.01.2008
Fuelling of the Jules Verne Automated Transfer Vehicle has started at Europe’s Spaceport. ATV is being loaded with Russian refuelling propellant destined for the International Space Station. After a month of fuelling operations, the launch and maiden voyage of the first European resupply spaceship is scheduled for the second half of February.

Early this month, the 20-tonne Jules Verne Automated Transfer Vehicle (ATV) was transferred to the huge fuelling chamber within the giant S5 integration building at Europe's Spaceport in Kourou, French Guiana.

Inside the fuelling chamber, the spacecraft was prepared for preliminary propellant filling operations, which began as scheduled on 8 January and will continue until early February.

In cooperation with ESA’s ATV project experts and Russian engineers on site, a dozen specialised technicians from Astrium sites in Bremen, Lampoldshausen (Germany), Stevenage (United Kingdom) and Les Mureaux (France) are in charge of these time-consuming and delicate operations.

“We are pleased with how well the schedule is progressing so far. This week, as planned, two identical tanks on the ATV were successfully loaded with 296 kg of Russian UDMH (Unsymmetric Dimethyl Hydrazine) which is the propellant fuel to be delivered to the International Space Station's (ISS) Russian-built propulsion tanks”, said Dominique Siruguet, ESA ATV Campaign Manager.

Protective suits

As a precaution against the toxic and explosive characteristics of the hydrazine, a series of strict measures are in place, such as the requirement for the ‘scapemen’ - the fuelling specialists – to wear special suits during fuelling operations. There are three teams of three ‘scapemen’. Because it is exhausting work wearing a pressurized suit in a high-risk environment, their task is limited to periods of four hour operations.

Next week, the oxidizer Nitrogen Tetroxide (N2O4) (which provides a source of oxygen so the fuel can ignite and burn in orbit), will also be stored on board the ATV to be delivered in orbit to the ISS. When Jules Verne is attached to the Station, both Russian produced UDMH and Nitrogen Tetroxide will be transferred through dedicated pipes which pass through the docking mechanism to the Space Station's own plumbing.

Fuel for ATV

On 20 January, 20 kg of pressurized gaseous oxygen will be loaded into Jules Verne. Through to the end of the month, the largest quantity of propellant will be fuelled on board: around 2216 kg of MMH (Monomethylhydrazine) and MON3 (Mixed Oxides of Nitrogen) propellant which will be used by the ATV’s own propulsion system. It will be used for the ATV’s autonomous navigation towards the ISS and, once docked, to control the attitude and orbit, including re-boost of the whole space complex. In free flight the ATV navigates as a fully automated spaceship, with four main engines (490 N thrust) plus 28 smaller thrusters (220 N) for attitude control.

Four propellants

“The month-long fuelling campaign is a result of having to load four different propellants, some in large quantities, and also some oxygen. Since each propellant is complex and dangerous to handle, the preparatory operations - the safety rules and the decontamination - takes much more time than the actual pressurized transfer of each product into the vehicle,” underlines Nicolas Chamussy, Astrium ATV Programme Manager based at Astrium facilities in Les Mureaux (France) and in Bremen (Germany). Quantitatively the ATV propellant load is at least three times that of the largest commercial satellites.

By the time ATV is moved to the BAF (Batiment d’Assemblage Final) in the first week of February, where it will be mated to Ariane 5 launcher, the ATV will hold four different types of propellant and 20 kg of oxygen, giving a total propellant mass of about 6.5 tonnes.

The whole Jules Verne ATV is 19.4 tonnes, including approximately 1300 kg of ‘dry cargo’. During fuelling operations, the ATV is electrically completely shut down for safety reasons, but each day the whole spacecraft is activated to check the spacecraft’s ‘health’, and charge the batteries once again.

Launch vehicle

The go-ahead for the start of Jules Verne fuelling operations also prompted the Astrium teams in Kourou to initiate the active preparation and integration of the Ariane 5. ATV will be carried into orbit by a special version of the Ariane 5 launch vehicle called the Ariane 5 Evolution Storable upper stage Automated Transfer Vehicle, or A5 ES-ATV for short. The mating of the two large vehicles is scheduled for early February.

Markus Bauer | alfa
Further information:
http://www.esa.int/SPECIALS/ATV/SEM4LI3MDAF_0.html

More articles from Power and Electrical Engineering:

nachricht Agricultural insecticide contamination threatens U.S. surface water integrity at the national scale
06.12.2018 | Universität Koblenz-Landau

nachricht Improving hydropower through long-range drought forecasts
06.12.2018 | Schweizerischer Nationalfonds SNF

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Researchers develop method to transfer entire 2D circuits to any smooth surface

What if a sensor sensing a thing could be part of the thing itself? Rice University engineers believe they have a two-dimensional solution to do just that.

Rice engineers led by materials scientists Pulickel Ajayan and Jun Lou have developed a method to make atom-flat sensors that seamlessly integrate with devices...

Im Focus: Three components on one chip

Scientists at the University of Stuttgart and the Karlsruhe Institute of Technology (KIT) succeed in important further development on the way to quantum Computers.

Quantum computers one day should be able to solve certain computing problems much faster than a classical computer. One of the most promising approaches is...

Im Focus: Substitute for rare earth metal oxides

New Project SNAPSTER: Novel luminescent materials by encapsulating phosphorescent metal clusters with organic liquid crystals

Nowadays energy conversion in lighting and optoelectronic devices requires the use of rare earth oxides.

Im Focus: A bit of a stretch... material that thickens as it's pulled

Scientists have discovered the first synthetic material that becomes thicker - at the molecular level - as it is stretched.

Researchers led by Dr Devesh Mistry from the University of Leeds discovered a new non-porous material that has unique and inherent "auxetic" stretching...

Im Focus: The force of the vacuum

Scientists from the Theory Department of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science (CFEL) in Hamburg have shown through theoretical calculations and computer simulations that the force between electrons and lattice distortions in an atomically thin two-dimensional superconductor can be controlled with virtual photons. This could aid the development of new superconductors for energy-saving devices and many other technical applications.

The vacuum is not empty. It may sound like magic to laypeople but it has occupied physicists since the birth of quantum mechanics.

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

EGU 2019 meeting: Media registration now open

06.12.2018 | Event News

Expert Panel on the Future of HPC in Engineering

03.12.2018 | Event News

Inaugural "Virtual World Tour" scheduled for december

28.11.2018 | Event News

 
Latest News

A new molecular player involved in T cell activation

07.12.2018 | Life Sciences

High-temperature electronics? That's hot

07.12.2018 | Materials Sciences

Supercomputers without waste heat

07.12.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>