Current research projects

Image High temperature heat pump
Image Performance tests of condensing units
Image Solar Cooling
Image Lifetime prediction of hermetic compressor systems
Image Service offer for Leak Detection and Tightness Test
Image Computational fluid dynamics CFD
Image High Capacity Pulse Tube Cooler
Image Testzentrum PLWP at ILK Dresden
Image Certification of efficient air conditioning and ventilation systems through the new "indoor air quality seal" for non-residential buildings
Image Low temperature – test facilities
Image Preformance measurements of heat exchangers
Image Thermostatic Expansion Valves
Image In-situ investigation concerning the swelling behaviour of polymer materials under elevated pressures and temperatures
Image Influenced melting point of water by magnetic field
Image Development of a Cryogenic Magnetic Air Separation Unit
Image Electrochemical decontamination of electrically conducting surfaces „EDeKo II“

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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

Low noise and non metallic liquid-helium cryostat

Low-noise Magnetic Field Cryostat for SQUID-Applications

Image

Cryostats, Non-Metallic and Metallic

position indenpendent, highest endurance, tiltable for liquid helium and liquid nitrogen

Image

Calibration of Low Temperature Sensors

According to the comparative measurement method

Image

High Capacity Pulse Tube Cooler

for Cryogenic High-Power Applications