Description - Stirling and Pulse–tube Cryo–coolers by Allan J. Organ
Modern technology calls increasingly for provision of cooling at
cryogenic temperatures: super-conductivity research; imaging
equipment for search-and-rescue; contemporary diagnostic medicine
(MRI ? magnetic resonance imaging); space exploration;
advanced computer hardware; military defence systems. Where it is
desirable to generate the cooling effect close to the point of heat
removal, electrically powered Stirling and pulse-tube machines
offer advantages over traditional, passive systems (Leidenfrost and
Joule-Thomson).
Until now there has been no agreed approach to the thermodynamic
design of either type. In particular, the choice of
regenerator packing has remained a matter for time-consuming
? and thus expensive ? trial-and-error
development. There has been no way of knowing whether an
existing ?fully developed? unit is performing to the
limit of its thermodynamic potential.
Stirling and Pulse-tube Cryo-coolers addresses these
problems.
Features include:
An ideal cycle for the pulse-tube yielding heat, mass-flow and
work;
Previously unseen phenomena of real gas behaviour;
Pictorial reliefs of pressure wave interactions;
Multiple wave reflections in graphic perspective
First solution of the ?regenerator problem ? by a
full, unsteady gas dynamics treatment;
First ever depiction of pulse-tube boundary-layer events (heat
conduction, ?streaming?) driven by interacting left-and
right-running pressure waves
First analysis of the graded regenerator and optimisation of
gas path design;
Embryonic ?cook-book? method of ab initio cooler
design based on dynamic similarity and thermodynamic scaling.
Stirling and Pulse-tube Cryo-coolers raises the threshold
from which first-principles design of regenerative cryo-coolers may
start. Those wishing to extend their study of the subject
beyond the well-trodden, ideal gas/quasi-steady-state
rationalisations will require this book.
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Thermodynamics and Gas Dynamics of the Stirling Cycle Machine
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