Current research projects

Image Low temperature – test facilities
Image Performance tests of condensing units
Image Hydrogen and methane testing field at the ILK
Image Micro heat exchangers in refrigeration
Image Certification of efficient air conditioning and ventilation systems through the new "indoor air quality seal" for non-residential buildings
Image Ionocaloric cooling
Image Low Temperature Measuring Service
Image Air-water heat pumps
Image Mass Spectrometer
Image Calibration leak for the water bath leak test
Image Practical training, diploma, master, bachelor
Image Micro fluidic expansion valve
Image All-in-one device for freeze-drying and production of biomaterial
Image Software for test rigs
Image Testing of mobile leak detectors according to DIN EN 14624
Image Service offer for Leak Detection and Tightness Test

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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 - Research and Development

Image

Low Temperature Measuring Service

Measurement of Thermal Properties at Low Temperatures