Current research projects

Image Investigation of material-dependent parameters
Image All-in-one device for freeze-drying and production of biomaterial
Image Investigation of materials
Image High temperature heat pump
Image Innovative Manufacturing Technologies for Cryosorption Systems
Image Test method for high - temperature heat pump - oils
Image Influenced melting point of water by magnetic field
Image Software modules
Image Non- invasive flow measurements
Image Low Temperature Tribology
Image Testing of mobile leak detectors according to DIN EN 14624
Image Optimizing HVAC operation with machine learning
Image Innovative cryogenic cooling system for the recondensation / liquefaction of technical gases up to 77 K
Image Air-flow test rig for fan characteristic measurement
Image Verification of storage suitability of cryo tubes
Image Computational fluid dynamics CFD

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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

ZeroHeatPump

Performance management of small heat pumps without energy consumption

Image

Investigation of material-dependent parameters

Investigation of the permeation behavior