Aktuelle Forschungsprojekte

Image Development of a Cryogenic Magnetic Air Separation Unit
Image Industry 4.0 membrane heat and mass exchanger (i-MWÜ4.0)
Image Low noise and non metallic liquid-helium cryostat
Image Investigation of materials
Image Innovative small helium liquefier
Image Software modules
Image Low Temperature Measuring Service
Image Verification of storage suitability of cryo tubes
Image Cold meter
Image Certification of efficient air conditioning and ventilation systems through the new "indoor air quality seal" for non-residential buildings
Image Multifunctional electronic modules for cryogenic applications
Image OVERALL SYSTEM OPTIMIZATION OF REFRIGERATION PLANT SYSTEMS FOR ENERGY TRANSITION AND CLIMATE PROTECTION
Image Innovative cryogenic cooling system for the recondensation / liquefaction of technical gases up to 77 K
Image Panel with indirect evaporative cooling via membrane
Image Performance tests of condensing units
Image High temperature heat pump

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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

Laseroptical measurement

PIV and LDA / PDA

Image

Multifunctional electronic modules for cryogenic applications

Electronic with less wiring effort - more than 100 sensors via one feedthrough

Image

Certifiable connection types in cryogenics

Detachable and permanent connections, adhesive bond / form closure / force closure

Image

Combined building and system simulation

Scientific analysis of thermodynamic processes in buildings and its systems

Image

Heat2Power

Refining of fuel cell waste heat