Focus areas in test bench construction
The units of all 4 focus areas use the same design. The medium, the temperature and the test specimen are different.
The 4 focus areas in detail
The values give the ranges and standards for which Profectronics built or designed units. They are not a commitment for a specific project.
| Focus area | Test specimen, test and characteristic values |
|---|---|
| Heat pumps and refrigeration | Performance map over source and sink temperature, defrost, unattended operation and end-of-line test in series production. Refrigerants also R290 and R744 (CO₂). |
| Data centre cooling and chip emulator | Test specimens: cold plate, manifold, quick-disconnect coupling and coolant distribution unit (CDU). The chip emulator replaces the processor with an electrically heated surface. It applies the same heat flux density on the same area, with load steps in the range of tenths of a second. Heat flux density up to 200 W/cm². |
| Power electronics | Power cycling to AQG 324, thermal resistance Rth(j-c) to JESD51-14, thermal impedance Zth to JESD51-1 and IEC 60747-9 and double-pulse test. Pure water circuits monitor the conductivity of the coolant in the converter. |
| Media conditioning | Temperature, pressure, flow rate and humidity as the boundary condition of a test. Adaptive control, a record for each test run. Flow rate up to 180 m³/h, steady-state control deviation ± 0.1 K. |
Environmental Solutions
Measuring instruments for radioactivity: aerosols and gaseous iodine in the air, stationary in the measurement cabin or mobile. Gamma spectrometry also as a drone payload and under water. The evaluation and the record come from Profectronics.
Test benches for thermal management
For heat exchangers, refrigerant components and cooling circuits, Profectronics builds 4 classes of units.
- Endurance and pressure pulsePressure pulse, temperature cycles, burst test and leak test for heat exchangers and refrigerant components
- CalorimetersPerformance measurement on condensers, gas coolers, radiators, charge air coolers and oil coolers
- Conditioning unitsCoolant, oil and charge air as the boundary condition for the test specimen
- Special test benchesto the customer specification, for example an autoclave test bench
Characteristic values and figures for each class of unit: Applications and examples of units.
Medium, test specimen and test for each focus area
The table shows the differences between the 4 focus areas and the Environmental Solutions division.
| Focus area or division | Medium | Test specimen or measuring instrument | Typical test or measurement |
|---|---|---|---|
| Heat pumps and refrigeration | Air, brine, water-glycol, refrigerants, also R290 and R744 (CO₂) | Heat pump, chiller, compressor | Performance map over source and sink, defrost, end-of-line |
| Data centre cooling | Water, water-glycol | Cold plate, manifold, quick-disconnect coupling, CDU | Heat flux density up to 200 W/cm², load steps, connection cycles with leak rate |
| Power electronics | Water-glycol, DI water with monitored conductivity | Power module, converter, heat sink | Power cycling, thermal resistance Rth, thermal impedance Zth, double pulse |
| Media conditioning | Demineralised water, water-glycol, oil, dielectric fluids, fuel, air, hydrogen, refrigerants | Each test specimen that needs a supply, the unit supplies the boundary condition | Hold and record temperature, pressure, flow rate and humidity |
| Environmental Solutions | Air with aerosols and gaseous iodine, water | Measuring instrument stationary in the measurement cabin, mobile, as a drone payload or under water | Gamma spectrometry, continuous monitoring, detection limit |
The focus areas overlap. A test bench for power modules needs the same conditioning as a test bench for cold plates. For this reason, media conditioning is a separate focus area next to the others. DI water: deionised water.
Data for an enquiry
An enquiry needs only 5 items of data: test specimen, medium, ranges for pressure, flow rate and temperature, installation site and date. A customer specification helps, but it is not a condition.
