Current research projects

Image Performance tests of condensing units
Image Reduction of primary noise sources of fans
Image Breakthrough Sensor for Adsorption Filters (BelA)
Image Verification of storage suitability of cryo tubes
Image Cryogenic liquid piston pumps for cold liquefied gases like LIN, LOX, LHe, LH2, LNG, LAr
Image Influenced melting point of water by magnetic field
Image Testzentrum PLWP at ILK Dresden
Image In-situ investigation concerning the swelling behaviour of polymer materials under elevated pressures and temperatures
Image Multifunctional electronic modules for cryogenic applications
Image Solar Cooling
Image Industry 4.0 membrane heat and mass exchanger (i-MWÜ4.0)
Image Hybrid- Fluid for CO2-Sublimation Cycle
Image Characterisation of Superconductors in Hydrogen Atmosphere
Image Non- invasive flow measurements
Image Test method for high - temperature heat pump - oils
Image State of system and failure analyses

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Thermostatic Expansion Valves

Industry

Dr.-Ing. Matthias Böhm

+49-351-4081-5211

Does the TXV function correctly?

We support the industry in the development of energy-efficient vapor-compression refrigeration system and compression heat pumps.

The ILK Dresden offers the following services for you:

The ILK Dresden have been active in the field of performance testing of refrigeration compressors and condensing units for over 20 years.

Our offer includes also the investigation of thermostatic expansion valves (TEV) with external temperature sensors.

The tests of the TEV are carried out on a suitable refrigeration cycles (fig. 2), taking into account the following standards

  • AHRI 750 (2007),
  • ANSI/ ASHRAE 17 (2008, fig. 1) and
  • ASERCOM-Statement (9_GER_Dimensionierung_von_TXV_2011)

Current calibrations of the measuring systems are a matter of course.

The test can be carried out with the refrigerants R134a, R404A, R407A, R407C, R407F, R448A, R513A, R452A up to a mass flow of 400 kg/h (~20 kW for R134a).

Additional offerings

The following influences on the valve behaviour can be investigated

  • run-in period
  • hysteresis
  • transient tests / time constant
  • pressure losses
  • sub cooling
  • ambient temperature
  • critical pressure ratio

Your Request

Further Projects

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Reducing the filling quantity

How much refrigerant must be filled?

Image

Performance tests of condensing units

Does your condensing unit perform well?

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State of system and failure analyses

Cause of the failure unknown?

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Thermostatic Expansion Valves

Does the TXV function correctly?