Current research projects

Image Non- invasive flow measurements
Image Tribological investigations of oil-refrigerant-material-systems
Image Overall System Optimization of Refrigeration Plant Systems for Energy Transition and Climate Protection
Image Combined building and system simulation
Image Brine (water)-water heat pump
Image Software for technical building equipment
Image Multifunctional electronic modules for cryogenic applications
Image Innovative Parahydrogen Generator Based on Magnets
Image In-Situ-Swelling Behaviour of Polymer Materials in Flammable Fluids
Image Ionocaloric cooling
Image Panel with indirect evaporative cooling via membrane
Image Reducing the filling quantity
Image Service offer for Leak Detection and Tightness Test
Image Characterisation of Superconductors in Hydrogen Atmosphere
Image Calibration of Low Temperature Sensors
Image Hybrid- Fluid for CO2-Sublimation Cycle

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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

Investigation of material-dependent parameters

Investigation of the permeation behavior

Image

Cool Up

Upscaling Sustainable Cooling

Image

Ionocaloric cooling

Ionocaloric solid-liquid phase cooling process

Image

Low temperature – test facilities

thermal cycling tests at very low temperatures