Aktuelle Forschungsprojekte

Image Characterisation of Superconductors in Hydrogen Atmosphere
Image Reduction of primary noise sources of fans
Image Calibration leak for the water bath leak test
Image Development of test methods and test rigs for stationary integrated refrigeration units
Image Behavior of multiphase cryogenic fluids
Image Software for technical building equipment
Image Calibration of Low Temperature Sensors
Image Lifetime prediction of hermetic compressor systems
Image Refrigerants, lubricants and mixtures
Image Investigation of coolants
Image Electrochemical decontamination of electrically conducting surfaces „EDeKo II“
Image Test procedures for electrical components
Image 3D - Air flow sensor
Image Ionocaloric cooling
Image Modular storage system for solar cooling
Image Thermostatic Expansion Valves

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Behavior of multiphase cryogenic fluids

Matthias Schneider

+49-351-4081-5126

experimental und numerical investigations

With the help of this basic research project, processes that occur during the sudden evaporation of cryogenic media should be better understood, described and evaluated. This should create possibilities for improved design and efficient operation of safety elements and power transmitting components in plants with cryogenic media.
A well-founded theoretical understanding of the dynamic calculation and evaluation of boiling cryogenic media will be developed. In order to obtain, for example, a concrete component behaviour under cryogenic conditions, numerical descriptions are required beyond the design calculations, both for fluid dynamics and for the spatial and temporal change in temperature.
Parallel to this, the experimental basis for the design of complex cryogenic components and systems engineering is being improved.
The objectives and results of the preliminary research project include

  • Calculated parameters from various numerical simulations for essential cryogenic components
  • Extensive experimental results for variations of the underlying geometry, advantageous process control, improved design of components
  • Basic thermodynamic processes in gas chillers
  • Calculation algorithms for the description of dynamic heat transport phenomena
  • Evaluation of critical plant conditions
  • Suitable materials for cryostat components and cryogenic plants
  • Novel components e.g. for small helium mass flows

An application project for the development of heat exchangers for cryogenic multiphase fluids is planned.

Video of the mass transfer rate between the liquid and the vapour phase inside a Venturi tube

If you can not see the video, please use the external link to YouTube.


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Further Projects

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Refrigerants, lubricants and mixtures

Determination of working fluid properties

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Reduction of primary noise sources of fans

...using numerical and experimental methods with contra-rotating axial fan

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Software for technical building equipment

Design cooling load and energetic annual simulation (VDI 2078, VDI 6007, VDI 6020)

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Measurements on ceiling mounted cooling systems

Comparative performance measurement

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Micro fluidic expansion valve

for increasing of the efficiency of small and compact cooling units