Current research projects

Development of test methods and test rigs for stationary integrated refrigeration units

ZeroHeatPump

Reduction of primary noise sources of fans

Overall System Optimization of Refrigeration Plant Systems for Energy Transition and Climate Protection

Cool Up

Behavior of multiphase cryogenic fluids

Lifetime prediction of hermetic compressor systems

Calibration leak for the water bath leak test

Test rigs for refrigeration and heat pump technology

Investigation of materials

Helium extraction from natural gas

In-Situ-Swelling Behaviour of Polymer Materials in Flammable Fluids

Heat2Power

Characterisation of Superconductors in Hydrogen Atmosphere

Mass Spectrometer

Cryogenic liquid piston pumps for cold liquefied gases like LIN, LOX, LHe, LH2, LNG, LAr

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Innovative small helium liquefier

EuroNorm GmbH (BMWi)

Dr. Erik Neuber

+49-351-4081-5122

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Liquefaction rates from 10 to 15 l/h

The goal of the R & D project is to explore new innovative ways to develop the functional model of a "helium liquefier for the small liquefaction rate". The development of such a system should cover the still non-existent area of the market.

This liquefier should contain several innovations and technical solutions:

Development of a helium liquefaction system with a liquefaction rate of 10 - 15 liters per hour of liquid helium.
Development of an innovative pre-cooling stage, which works with a mixture of helium and refrigerants as working fluid.
Detailed investigation of an innovative helium cycle within the development of the helium small liquefier with the ability to operate in different operating regimes: helium liquefaction, cooling and temperature stabilization/control.
Operation of the condenser with a liquefaction rate that can be varied over a wide range - between 75% and 100%.

Currently, the functional design of the helium small liquefier is being set up. The figure shows a 3D model of the cold box, in which all heat exchangers and cold valves are mounted. In the upper part of the cold box, two prototypes of low flow helium turboexpanders are mounted. All external components, piping and condenser control system are located on the front of the cold box.

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