Current research projects

Image Certification of efficient air conditioning and ventilation systems through the new "indoor air quality seal" for non-residential buildings
Image Industry 4.0 membrane heat and mass exchanger (i-MWÜ4.0)
Image In-Situ-Swelling Behaviour of Polymer Materials in Flammable Fluids
Image Software modules
Image Ice Slurry Generation
Image CO₂ GAS HYDRATES FOR SUSTAINABLE ENERGY AND COOLING SOLUTIONS
Image Hybrid- Fluid for CO2-Sublimation Cycle
Image Testzentrum PLWP at ILK Dresden
Image Characterisation of Superconductors in Hydrogen Atmosphere
Image Investigation of material-dependent parameters
Image Refrigerants, lubricants and mixtures
Image Swirl-free on the move...
Image Reduction of primary noise sources of fans
Image Development of a Cryogenic Magnetic Air Separation Unit
Image Micro heat exchangers in refrigeration
Image Micro fluidic expansion valve

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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