Refrigeration-licuefaccion con stirling.pdf

.ART OF TECHNOLOGY

STIRLING TECHNOLOGY

The Stirling process is a sealed refrigerant

gas process. The inert gas helium is used

as process gas, which is neither toxic nor

flammable.

It also has no ozone depleting potential

and subsequently makes no contribution

to global warming. Contrary to

conventional cold steam refrigerators,

Stirling machines involve no

phase changes. As a result, the

refrigeration temperature, as well as the

heat transfer temperature, are both in-

dependent of pressure levels and can

therefore be freely selected.

As shown by the diagram, Stirling

refrigerators offer better efficiencies than

single and two-stage cold steam

refrigerators at refrigeration temperatures

below - 50 ° C.

STIRLING REFRIGERATOR

Solo developed a Stirling motor, which is

manufactured in volume and is utilised for the

production of power and heat. In conjunction

with the Institute for Applied Thermodynamics

and Air-conditioning at the University of Essen,

this motor was converted into a refrigerator,

providing refrigeration at temperatures down to

–200 ° C. These temperatures are applied in

low-temperature technology, for example in the

re-condensation of solvents in industry as well

as for liquefying methane in the medical sector,

the food processing industry or in

superconduction. By varying the speed or the

process gas pressure, the output can be

controlled in a broad range, whilst still

achieving excellent efficiencies at part loads.

Cool facts

• environmentally neutral process medium

(no ozone depleting or greenhouse effect)

• any temperature may be selected for the

refrigeration process and the cooling water

• excellent part load characteristics

• excellent controllability

• max. refrigeration output: ~4 kW at –120

° C / ~8 kW at –40 ° C

• complete module (ready to connect to the

refrigerant medium and cooling water

circuit)

• thermo-dynamic design: Institute for Applied

Thermodynamics and Air-Conditioning at the

University of Essen (Prof. Steimle)

SOLO STIRLING GmbH Postfach 60 01 52 D 71050 Sindelfingen Telefon 07031/301-0 Telefax 07031/301-195 info@stirling-engine.de www.stirling-engine.de