Aktuelle Forschungsprojekte

Image Low noise and non metallic liquid-helium cryostat
Image Helium extraction from natural gas
Image Filter Tests
Image Investigation of coolants
Image Preformance measurements of heat exchangers
Image State of system and failure analyses
Image Corrosion inhibitor for ammonia absorption systems
Image Practical training, diploma, master, bachelor
Image Low Temperature Tribology
Image Verification of storage suitability of cryo tubes
Image Solar Cooling
Image Test rigs for refrigeration and heat pump technology
Image High temperature heat pump
Image Laseroptical measurement
Image Pulse-Tube-Refrigerator with sealed compressor
Image Micro heat exchangers in refrigeration

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

Image

Software for test rigs

Individual software for complex tests and evaluation

Image

Brine (water)-water heat pump

Test according DIN EN 14511 and 14825

Image

High temperature heat pump

Using waste heat from industrial processes

Image

Air-water heat pumps

Test according DIN EN 14511 and 14825

Image

Micro heat exchangers in refrigeration

3D-printing of micro heat exchangers