Aktuelle Forschungsprojekte

Image Measurements on ceiling mounted cooling systems
Image Innovative cryogenic cooling system for the recondensation / liquefaction of technical gases up to 77 K
Image Computational fluid dynamics CFD
Image Preformance measurements of heat exchangers
Image Reducing the filling quantity
Image Innovative Manufacturing Technologies for Cryosorption Systems
Image Micro heat exchangers in refrigeration
Image Electrochemical decontamination of electrically conducting surfaces „EDeKo II“
Image Influenced melting point of water by magnetic field
Image Low noise and non metallic liquid-helium cryostat
Image Air-flow test rig for fan characteristic measurement
Image Practical training, diploma, master, bachelor
Image In-situ investigation concerning the swelling behaviour of polymer materials under elevated pressures and temperatures
Image Humidifier System for High-Purity Gases
Image Test rigs for refrigeration and heat pump technology
Image Combined building and system simulation

You are here:   /  Home


Cryogenic liquid piston pumps for cold liquefied gases like LIN, LOX, LHe, LH2, LNG, LAr

Industry and Research Institutes

Ulrich Zerweck-Trogisch

+49-351-4081-5134

Feeding pumps for cryogenic liquid gases

The ILK has developed a modularly constructed pump that can deliver cryogenic liquefied gases like LN2, LO2, LHe, LNG, LAr and others. Thanks to the building block principle tailor-made solutions can be offered by the combination of pump drives of different power categories together with geometrically optimized pump heads to satisfy the individual requirements of volume flow, pressure build-up and conveyed medium.

Designed as piston pump it is characterized by comparably slow stroke speeds. That low pace eliminates or reduces the tendency towards cavitation as flow resistances and accelerating forces are reduced to a minimum.
 
Owing to its special design and the material combinations used the linear drive can be operated at deep-cold temperatures. It is mounted between the cylinders of the piston pump and is immersed and submerged directly in the cryogenic liquid gas. By avoiding rotating parts a conventional lubrication with oil and grease becomes needless, this allows for an almost maintenance-free operation.

The pumping cylinders are arranged on both sides of the linear drive. The valves are integrated into the cylinder heads. For each application they are customized for the required flow capacity and the physical properties of the medium to be delivered (regarding density, viscosity and cavitation tendency).
 
The design as double-acting piston pump facilitates an extraordinary high dynamism of the delivered volume flow. The (constant) speed of the linear drive can be varied in a wide range to generate an even volume flow. An intermittent operation is easily possible and allows for a high pump efficiency even at partial-load situation close to zero. Adverse effects like increased heat input or limited start-stop-cycles do not occur.


Due to the easy possibility to immerse and submerge in the cryogenic liquid to be fed, the piston pump is excellently suited to e. g. circulate the cryogenic cooling liquid along a superconducting power line in a hermetic piping system. Another application can be found in the dispensing of cryogenic liquid into transport dewars as the pump eliminates the need of artificial evaporation of the medium for pressure build-up during filling.

Video Operation with Liquid Argon and Liquid Nitrogen

Granted Patent

DE 10 2008 011 456.1


Your Request

Further Projects

Image

Test procedures for electrical components

Insulating properties of hermetic compressors

Image

3D - Air flow sensor

Anemometer for determination of 3d-air flow