Aktuelle Forschungsprojekte

Performance tests of condensing units

Ice Slurry Generation

All-in-one device for freeze-drying and production of biomaterial

Hybrid- Fluid for CO2-Sublimation Cycle

Air-water heat pumps

Verification of storage suitability of cryo tubes

Innovative cryogenic cooling system for the recondensation / liquefaction of technical gases up to 77 K

Influenced melting point of water by magnetic field

Brine (water)-water heat pump

IN-SITU SWELLING BEHAVIOUR OF POLYMER MATERIALS IN FLAMMABLE FLUIDS

Certification of efficient air conditioning and ventilation systems through the new "indoor air quality seal" for non-residential buildings

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

Software for technical building equipment

Investigation of materials

Industry 4.0 membrane heat and mass exchanger (i-MWÜ4.0)

Lifetime prediction of hermetic compressor systems

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Low Temperature Measuring Service

Industry and R&D

Dr. rer. nat. Matthias Schneider

+49-351-4081-5126

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Measurement of Thermal Properties at Low Temperatures

The cool down to cryogenic temperature causes thermal stress within the structure of components or complete devices. Furthermore thermal material properties could change crucial.

Samples can be proved down to 10 K via temperature cycling tests and/or measurements of the thermal conductivity, the coefficient of thermal expansion (also as integral for large sample dimensions) and the heat capacity. An experimental station with optimised conditions for measuring the thermal conductivity of different materials is under construction.

Thermal Tests (Cycling)

Indicator	Minimal	Maximal
Cool down rate	25 K/h	200 K/min
Cool down cycles	1	Customer preference
Measuring accuracy	1 %	5 %
Temperature range	80 K (5 K)	450 K
Sample preparation	Customer material
Sample dimension	up to	Ø 400 mm x 550 mm
	other	dimenions on request

Thermal Conductivity

Indicator	Minimal	Maximal
Measuring range	10^-2 W/(m K)	10³ W/(m K)
Measuring accuracy	1 %	5 %
Temperature range	10 K	350 K
Sample preparation	Customer material
Sample dimension	up to	Ø 60 mm x 20 mm
	other	dimenions on request

Heat Capacity

Indicator	Minimal	Maximal
Measuring range	10J/(kg K)	10 J/(kg K)
Measuring accuracy	1 %	5 %
Temperature range	10 K	350 K
Sample preparation	Customer material
Sample dimension	up to	150 x 150 x 150 mm³
	other	dimenions on request

Coefficient of Thermal Expansion

Indicator	Minimal	Maximal
Measuring range	10^-6 K^-1	10^-4K^-1
Measuring accuracy	0.1 %	5 %
Temperature range	10 K	350 K
Sample preparation	Customer material
Sample dimension	up to	200 x 200 x 200 mm³
	other	dimenions on request