German industrial gas specialist Vertriebs-GmbH has signed a contract to supply cryogenic nitrogen to the Institute for Aircraft Propulsion Systems (ILA) at the University of Stuttgart.

The Hessen-based industrial gas producer will supply 1 million kg of nitrogen per year, over a period of 5 years, and is also supplying the on-site tank system and piping.

Cryogenic nitrogen is being used to simulate polar air n a turbine test rig at the institute, with the nitrogen needed for the operation of an air cooler that produces cold dry air chilled to a temperature of -90oc.

The turbines are being tested under arctic conditions to check their reliability for take-offs at the North and South Pole and almost 300 tonnes per hour of liquid nitrogen is required to fill the test rig with freezing cold air.

With the signing of this contract Stefan Messer, who sold his shares in Messer in 2004, has laid an important foundation for the company based in Sulzbach.