Current research projects

Image Corrosion inhibitor for ammonia absorption systems
Image Cool Up
Image Reduction of primary noise sources of fans
Image Heat2Power
Image Optimizing HVAC operation with machine learning
Image Testing of mobile leak detectors according to DIN EN 14624
Image Low temperature – test facilities
Image IO-Scan - Integral measuring optical scanning method
Image Reducing the filling quantity
Image Tribological investigations of oil-refrigerant-material-systems
Image Micro fluidic expansion valve
Image Certification of efficient air conditioning and ventilation systems through the new "indoor air quality seal" for non-residential buildings
Image Test procedures for electrical components
Image Hydrogen and methane testing field at the ILK
Image Multifunctional electronic modules for cryogenic applications
Image Measurement of insulated packaging

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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

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Performance tests of condensing units

Does your condensing unit perform well?

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State of system and failure analyses

Cause of the failure unknown?

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Testzentrum PLWP at ILK Dresden

Test Fluid-Energy Machines and Components

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Performance tests of refrigerant compressors

Does your compressor perform well?

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Swirl-free on the move...

...with a contra-rotating fan