Aktuelle Forschungsprojekte

Image Optimizing HVAC operation with machine learning
Image Heat2Power
Image Innovative cryogenic cooling system for the recondensation / liquefaction of technical gases up to 77 K
Image Investigation of materials
Image Intelligent innovative power supply for superconducting coils
Image Tribological investigations of oil-refrigerant-material-systems
Image 3D - Air flow sensor
Image Combined building and system simulation
Image Development of test methods and test rigs for stationary integrated refrigeration units
Image Software modules
Image Ice Slurry Generation
Image Calibration leak for the water bath leak test
Image Helium extraction from natural gas
Image Low Temperature Tribology
Image Measurement of insulated packaging
Image High Capacity Pulse Tube Cooler

You are here:   /  Home


Pulse-Tube-Refrigerator with sealed compressor

Federal Ministry of Economics and Energy

Dipl.-Ing. Gunar Schroeder

+49-351-4081-5129

for mobil use in the hydrogen technology

Within the research project "Mobile single-stage pulse tube cooler with hermetic compressor drive" (project number MF 130012), a compact, robust and low-maintenance cryocooler was developed.
Possible applications for this cryocooler, e.g.,

  • Cooling of mobile high-pressure tanks for storing fuels in cryogenic liquid or supercritical state (e. g. H2 – cryogenic under high pressure)
  • mobile cooling applications < –40°C in medical technology, transport of organic material or samples

The system has a simple and cost-effective design with the following advantages:

  • Mobile use, supply voltage 12 V or 24 V, air-cooled
  • Supply of cryogenic temperatures in the range 60...120 K
  • Low maintenance and long-life, no moving parts in the cold part
  • Programmable temperature curves via microcontroller-based control
  • Low power consumption, in the range of 500 W
  • Low space requirement, arrangement can be adapted
  • Lower costs control through extensive use of commercial components

Figure 1 shows the experimental setup of the cryocooler in a specially adapted orifice double inlet configuration. With the use of a special valve control, 2 W cooling capacity at 77 K and 5 W at 90 K could be achieved. The lowest temperature reached with this single-stage configuration was 68 K. The temperature stability of the system was validated in a test lasting 100 h, see figure 2. In further investigations with a specially adapted compressor, even lower temperatures are to be achieved, down to 40 K.

We are looking for industrial partners for adaptations for special application purposes or possible further developments. Conceivable are, for example, a compact system suitable for use in motor vehicles in a functional housing with the necessary interfaces or a further development of the current cooler to achieve higher cooling capacity, lower temperatures and higher efficiency.


Your Request

Further Projects

Image

Investigation of material-dependent parameters

Investigation of the permeation behavior

Image

Cool Up

Upscaling Sustainable Cooling

Image

Ionocaloric cooling

Ionocaloric solid-liquid phase cooling process

Image

Low temperature – test facilities

thermal cycling tests at very low temperatures