Current research projects

Image Electrical components in refrigeration circuits
Image IO-Scan - Integral measuring optical scanning method
Image Influenced melting point of water by magnetic field
Image In-situ investigation concerning the swelling behaviour of polymer materials under elevated pressures and temperatures
Image Measurement of insulated packaging
Image Micro heat exchangers in refrigeration
Image Cryogenic liquid piston pumps for cold liquefied gases like LIN, LOX, LHe, LH2, LNG, LAr
Image Laseroptical measurement
Image Optimizing HVAC operation with machine learning
Image 3D - Air flow sensor
Image Intelligent innovative power supply for superconducting coils
Image Computational fluid dynamics CFD
Image Range of services laboratory analyses
Image Innovative Parahydrogen Generator Based on Magnets
Image Investigation of coolants
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