. A R T O F T E C H N O L O G Y
STIRLING TECHNOLOGY
STIRLING TECHNOLOGY
The Stirling process is a sealed refrigerant
The Stirling process is a sealed refrigerant
gas process. The inert gas helium is used
gas process. The inert gas helium is used
as process gas, which is neither toxic nor
as process gas, which is neither toxic nor
flammable.
flammable.
It also has no ozone depleting potential
It also has no ozone depleting potential
and subsequently makes no contribution
and subsequently makes no contribution
to global warming. Contrary to
to global warming. Contrary to
conventional cold steam refrigerators,
conventional cold steam refrigerators,
Stirling machines involve no
Stirling machines involve no
phase changes. As a result, the
phase changes. As a result, the
refrigeration temperature, as well as the
refrigeration temperature, as well as the
heat transfer temperature, are both in-
heat transfer temperature, are both in-
dependent of pressure levels and can
dependent of pressure levels and can
therefore be freely selected.
therefore be freely selected.
As shown by the diagram, Stirling
As shown by the diagram, Stirling
refrigerators offer better efficiencies than
refrigerators offer better efficiencies than
single and two-stage cold steam
single and two-stage cold steam
refrigerators at refrigeration temperatures
refrigerators at refrigeration temperatures
below - 50 °C.
below - 50 °C.
STIRLING REFRIGERATOR
STIRLING REFRIGERATOR
Solo developed a Stirling motor, which is
Solo developed a Stirling motor, which is
manufactured in volume and is utilised for the
manufactured in volume and is utilised for the
production of power and heat. In conjunction
production of power and heat. In conjunction
with the Institute for Applied Thermodynamics
with the Institute for Applied Thermodynamics
and Air-conditioning at the University of Essen,
and Air-conditioning at the University of Essen,
this motor was converted into a refrigerator,
this motor was converted into a refrigerator,
providing refrigeration at temperatures down to
providing refrigeration at temperatures down to
 200 °C. These temperatures are applied in
 200 °C. These temperatures are applied in
low-temperature technology, for example in the
low-temperature technology, for example in the
re-condensation of solvents in industry as well
re-condensation of solvents in industry as well
as for liquefying methane in the medical sector,
as for liquefying methane in the medical sector,
the food processing industry or in
the food processing industry or in
superconduction. By varying the speed or the
superconduction. By varying the speed or the
process gas pressure, the output can be
process gas pressure, the output can be
controlled in a broad range, whilst still
controlled in a broad range, whilst still
achieving excellent efficiencies at part loads.
achieving excellent efficiencies at part loads.
Cool facts
Cool facts
" environmentally neutral process medium
" environmentally neutral process medium
(no ozone depleting or greenhouse effect)
(no ozone depleting or greenhouse effect)
" any temperature may be selected for the
" any temperature may be selected for the
refrigeration process and the cooling water
refrigeration process and the cooling water
" excellent part load characteristics
" excellent part load characteristics
" excellent controllability
" excellent controllability
" max. refrigeration output: ~4 kW at  120
" max. refrigeration output: ~4 kW at  120
°C / ~8 kW at  40 °C
°C / ~8 kW at  40 °C
" complete module (ready to connect to the
" complete module (ready to connect to the
refrigerant medium and cooling water
refrigerant medium and cooling water
circuit)
circuit)
" thermo-dynamic design: Institute for Applied
" thermo-dynamic design: Institute for Applied
Thermodynamics and Air-Conditioning at the
Thermodynamics and Air-Conditioning at the
University of Essen (Prof. Steimle)
University of Essen (Prof. Steimle)
SOLO STIRLING GmbH Postfach 60 01 52 D 71050 Sindelfingen Telefon [phone] Telefax 07031/301-195 [e-mail] www.stirling-engine.de
SOLO STIRLING GmbH Postfach 60 01 52 D 71050 Sindelfingen Telefon [phone] Telefax 07031/301-195 [e-mail] www.stirling-engine.de
902 161 02 900