Current research projects

Image Laseroptical measurement
Image Energy efficiency consulting - cogeneration systems
Image Micro heat exchangers in refrigeration
Image Panel with indirect evaporative cooling via membrane
Image In-Situ-Swelling Behaviour of Polymer Materials in Flammable Fluids
Image Overall System Optimization of Refrigeration Plant Systems for Energy Transition and Climate Protection
Image Tensile and compression testing
Image Hybrid- Fluid for CO2-Sublimation Cycle
Image Test rigs for refrigeration and heat pump technology
Image Low temperature – test facilities
Image High temperature heat pump
Image In-situ investigation concerning the swelling behaviour of polymer materials under elevated pressures and temperatures
Image Thermostatic Expansion Valves
Image Intelligent innovative power supply for superconducting coils
Image 3D - Air flow sensor
Image Hydrogen and methane testing field at the ILK

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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

Image

ZeroHeatPump

Performance management of small heat pumps without energy consumption

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

Image

Investigation of material-dependent parameters

Investigation of the permeation behavior