Current research projects

Image Low Temperature Tribology
Image Service offer for Leak Detection and Tightness Test
Image Behavior of multiphase cryogenic fluids
Image Cool Up
Image Ice Slurry Generation
Image Verification of storage suitability of cryo tubes
Image Development of a Cryogenic Magnetic Air Separation Unit
Image Calibration leak for the water bath leak test
Image Industry 4.0 membrane heat and mass exchanger (i-MWÜ4.0)
Image Software for technical building equipment
Image Micro fluidic expansion valve
Image Brine (water)-water heat pump
Image Pulse-Tube-Refrigerator with sealed compressor
Image Thermostatic Expansion Valves
Image Cryogenic liquid piston pumps for cold liquefied gases like LIN, LOX, LHe, LH2, LNG, LAr
Image Performance tests of condensing units

You are here:   /  Home


Innovative cryogenic cooling system for the recondensation / liquefaction of technical gases up to 77 K

Dr. rer. nat. Erik Neuber

+49-351-4081-5122

high performance efficiency, environmental friendliness, compactness, cost-effectiveness

The main objective of the R&D project is the development of a cryogenic cooling system capable of recondensing a gas stream of vaporized natural gas back to its liquid form or cooling and/or liquefying other gases to a temperature level of 77 K. The technical solutions for the development of the system aim to provide a number of advantages over existing systems: high performance efficiency, environmental friendliness, compactness, and cost-effectiveness.
The cryogenic refrigeration system will include several innovations and technical solutions:

  • Development of an innovative and cost-effective refrigeration source based on a mixed-refrigerant low-temperature cooler.
  • Detailed calculation and determination of innovative as well as adapted zeotropic refrigerant mixtures, which optimize the energy efficiency of the cooler with respect to its application and ensure environmental friendliness.
  • Determination of the optimal as well as adapted working parameters and dimensions of the cooler and its components with regard to its desired properties (efficiency, fire protection, etc.).

On the basis of the chosen principle of the cryogenic cooling system, a special Linde-Hampson refrigerant mixture cooler was designed, which works with zeotropic refrigerant mixtures and should achieve temperatures of ≤ 100 K, see Figure 1. Thermodynamic calculations of the circuit and the determination of the components of the working mixture and their composition were carried out. For this purpose multiparametric optimization methods as well as gradient methods with different calculation grids were used.
As functional model, a system was implemented which should enable the liquefaction of nitrogen via a second refrigerant circuit. This model was initially tested with simple standard refrigerants and multi-component refrigerant mixtures and works very reliably. The results obtained will be used in the next step to demonstrate the liquefaction of nitrogen.


Your Request

Further Projects

Image

Solar Cooling

Solar Cooling with Photovoltaic

Image

Hydrogen and methane testing field at the ILK

Simultaneously pressures up to 1,000 bar, temperatures down to –253°C

Image

Low noise and non metallic liquid-helium cryostat

Low-noise Magnetic Field Cryostat for SQUID-Applications

Image

Cryostats, Non-Metallic and Metallic

position indenpendent, highest endurance, tiltable for liquid helium and liquid nitrogen