Current research projects

Image Thermal engines
Image Low Temperature Tribology
Image Test rigs for refrigeration and heat pump technology
Image Electrochemical decontamination of electrically conducting surfaces „EDeKo II“
Image Investigation of material-dependent parameters
Image Preformance measurements of heat exchangers
Image Behavior of multiphase cryogenic fluids
Image Service offer for Leak Detection and Tightness Test
Image Range of services laboratory analyses
Image Investigation of materials
Image IO-Scan - Integral measuring optical scanning method
Image Laseroptical measurement
Image Micro heat exchangers in refrigeration
Image Software for test rigs
Image Performance tests of refrigerant compressors
Image Innovative Manufacturing Technologies for Cryosorption Systems

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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 - Measurements and Tests

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Electrical components in refrigeration circuits

High voltage tests under real conditions

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Investigation of materials

Investigations regarding the compatibility of materials with refrigerants, oils and heat transfer fluids

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Non- invasive flow measurements

PDPA - flow fields and particle sizes