Aktuelle Forschungsprojekte

Image Test procedures for electrical components
Image Lifetime prediction of hermetic compressor systems
Image Investigation according to DIN EN ISO 14903
Image Air-water heat pumps
Image Software modules
Image Development of a Cryogenic Magnetic Air Separation Unit
Image Low Temperature Tribology
Image Corrosion inhibitor for ammonia absorption systems
Image Swirl-free on the move...
Image Investigation of coolants
Image Performance tests of condensing units
Image Range of services laboratory analyses
Image Innovative cryogenic cooling system for the recondensation / liquefaction of technical gases up to 77 K
Image Investigation of materials
Image Certifiable connection types in cryogenics
Image In-situ investigation concerning the swelling behaviour of polymer materials under elevated pressures and temperatures

You are here:   /  Home


Development of test methods and test rigs for stationary integrated refrigeration units

BMWi Euronorm Innokom

02/2017 – 07/2019

Andreas Peusch

+49-351-4081-5221

How efficient is my refrigeration unit?

The objective of the R&D project was the development of a test method for stationary integrated refrigeration units. The test method comprises different device variants, like ceiling mounted, wall mounted or split refrigeration units. The method provides reliable performance data and thus enables a manufacturer-independent efficiency comparison.

Measurements in the 3- or 4-chamber measurement setup were carried out using the calorimeter method with compensation of the ambient conditions. This enabled the measurements of devices with low cooling capacity (0.5 - 4 kW).

In the selected test setup (Figure 1), the cooling capacity is measured indirectly via an electrical power of the compensation heating. To determine the total cooling capacity, the heat input into the calorimeter room and, if necessary, internal loads (sensible and latent heat) have to be added together.

The test method comprises following features:

  • Suitable for low temperature devices (-20 °C) and normal temperature cooling (0 °C)
  • Measurement in the calorimeter room (3- or 4-zone concept)
  • Determination of heat input via enclosure surfaces before power measurement
  • Establishment of equilibrium conditions (settling phase) of the temperatures to be set (up to 24 h)
  • Measuring period up to 6 h with permissible tolerance band of 0.2 K

Conclusion:

  • Results were included in new test standard prEN 17432
  • Establishment of a uniform Europe-wide comparison criterion
  • Performance and efficiency data on a uniform basis leads to higher confidence and thus also to lower consumption costs

Your Request

Further Projects