Current research projects

Image Calibration of Low Temperature Sensors
Image High temperature heat pump
Image Hybrid- Fluid for CO2-Sublimation Cycle
Image Micro heat exchangers in refrigeration
Image In-situ investigation concerning the swelling behaviour of polymer materials under elevated pressures and temperatures
Image Investigation of coolants
Image Investigation according to DIN EN ISO 14903
Image Reduction of primary noise sources of fans
Image 3D - Air flow sensor
Image Low Temperature Measuring Service
Image Panel with indirect evaporative cooling via membrane
Image Innovative cryogenic cooling system for the recondensation / liquefaction of technical gases up to 77 K
Image IO-Scan - Integral measuring optical scanning method
Image Humidifier System for High-Purity Gases
Image Electrical components in refrigeration circuits
Image Reducing the filling quantity

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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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Low Temperature Tribology

Tribological studies at cryogenic temperatures

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Investigation of coolants

Secondary loop refrigerants

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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