Current research projects

Image Combined building and system simulation
Image Humidifier System for High-Purity Gases
Image Air-water heat pumps
Image Low Temperature Tribology
Image Test rigs for refrigeration and heat pump technology
Image Verification of storage suitability of cryo tubes
Image Innovative cryogenic cooling system for the recondensation / liquefaction of technical gases up to 77 K
Image Low noise and non metallic liquid-helium cryostat
Image Filter Tests
Image Testzentrum PLWP at ILK Dresden
Image Measurements on ceiling mounted cooling systems
Image Pulse-Tube-Refrigerator with sealed compressor
Image Performance tests of condensing units
Image Testing of mobile leak detectors according to DIN EN 14624
Image Cool Up
Image Thermostatic Expansion Valves

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Performance tests of condensing units

Industry

Dr.-Ing. Matthias Böhm

+49-351-4081-5211

Does your condensing unit perform well?

The Test center PWLP supports 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:

For a defined application map of air-cooled condensing units, we determine the cooling capacity, drive capacity, COP, etc. The tests are carried out on a refrigeration circuit in combination with a climatic chamber (Fig. 1).

As part of the accreditation of the PLWP according to DIN EN ISO / IEC 17025, the PLWP conducts the investigation of air-cooled condensing units according to the currently applicable measurement standards DIN EN 13771-2:2017-11 and DIN EN 13215:2017-03.

Performance tests in the range 0.7 ... 10 kW can be carried out normatively for evaporation temperatures of -35, -10 to +5°C with air inlet temperatures in the condensing unit of 5, 15, 25, 32 to 42°C (partial load).
Current calibrations of the measuring systems are a matter of course.
Within the scope of our flexible accreditation, further measuring tasks can be realized according to applicable test standards.

The test can be carried out with the refrigerants R134a, R404a, R407C, R410A, R452A. The source of the thermodynamic properties of the refrigerants is the library ASREP from ASERCOM.

Outside accreditation, further services can be offered:

Additional offerings

  • Investigation of map points outside the standard values
  • Measurement of the oil discharge
  • Measurement of the air volume flow
  • Investigation with variable rotation speed (frequency inverter)
  • Sound investigations in the third octave or octave frequency band
  • Measurement of pulsation in pipes

Research and Development

The ILK Dresden has been active in the development and testing of refrigeration and heat pump technology for many years. The development work is carried out individually and in close cooperation with the client. The experiences of the ILK Dresden were and are continuously collected in a multiplicity of research projects.

Various investigations were carried out on the suitability of the standardized test methods within the scope of the project “Test methods and test rigs for condensing units” (BMWi MF 150072, 1.10.2015 - 30.03.2018).

Some results of the project in terms of test rig design and test methodology are:

  • the investigation and confirmation of suitable minimum wall spacing’s for structurally open condensing units (room size and support fan of the room air system)
  • the suitable distribution of sensors for temperature at the air inlet and the influence of condenser geometry on the average inlet temperature in the test room
  • the analysis of the differentiated possibilities of energy-efficient test rig operation through regenerative condenser heat utilisation in the refrigeration circuit of the test rig
  • the requirements and restrictions for automatic measurement of the circulating oil concentration via mass flow sensors.

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Further Projects - Research and Development

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Air-water heat pumps

Test according DIN EN 14511 and 14825

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High temperature heat pump

Using waste heat from industrial processes

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Micro heat exchangers in refrigeration

3D-printing of micro heat exchangers

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Electrochemical decontamination of electrically conducting surfaces „EDeKo II“

Improvement of sanitary prevention by electrochemical decontamination