Current research projects

Image Test rigs for refrigeration and heat pump technology
Image Investigation of material-dependent parameters
Image Investigation of materials
Image Cryogenic liquid piston pumps for cold liquefied gases like LIN, LOX, LHe, LH2, LNG, LAr
Image Testing of mobile leak detectors according to DIN EN 14624
Image Helium extraction from natural gas
Image Pulse-Tube-Refrigerator with sealed compressor
Image Measurements on ceiling mounted cooling systems
Image CFE-Test of Cooker Hoods
Image IO-Scan - Integral measuring optical scanning method
Image Low Temperature Measuring Service
Image Software modules
Image Reducing the filling quantity
Image Thermal engines
Image Multifunctional electronic modules for cryogenic applications
Image Development of a Cryogenic Magnetic Air Separation Unit

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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