Current research projects

Image Multifunctional electronic modules for cryogenic applications
Image High temperature heat pump
Image Innovative cryogenic cooling system for the recondensation / liquefaction of technical gases up to 77 K
Image Performance tests of refrigerant compressors
Image Non- invasive flow measurements
Image Certifiable connection types in cryogenics
Image Software for test rigs
Image Low noise and non metallic liquid-helium cryostat
Image Air-flow test rig for fan characteristic measurement
Image Low Temperature Tribology
Image Electrical components in refrigeration circuits
Image Cryostats, Non-Metallic and Metallic
Image Modular storage system for solar cooling
Image Lifetime prediction of hermetic compressor systems
Image Overall System Optimization of Refrigeration Plant Systems for Energy Transition and Climate Protection
Image Performance tests of condensing units

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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 - Measurements and Tests

Image

Mass Spectrometer

Determining the composition of gas mixtures in the high or ultra-high vacuum range

Image

Tensile and compression testing

Determination of yield strength, tensile strength and elongation at break

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Investigation of material-dependent parameters

Investigation of the permeation behavior

Image

Breakthrough Sensor for Adsorption Filters (BelA)

Sensor system for detecting an imminent breakthrough in gas filtration