Tapered pulse tube for pulse tube refrigerators

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872520

Swift, Gregory W ^[1]; Olson, Jeffrey R ^[2]

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1. Sante Fe, NM
2. San Mateo, CA

Thermal insulation of the pulse tube in a pulse-tube refrigerator is maintained by optimally varying the radius of the pulse tube to suppress convective heat loss from mass flux streaming in the pulse tube. A simple cone with an optimum taper angle will often provide sufficient improvement. Alternatively, the pulse tube radius r as a function of axial position x can be shaped with r(x) such that streaming is optimally suppressed at each x.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• Assignee: Regent of University of California (Los Alamos, NM)
• Patent Number(s): US 5953920
• OSTI ID: 872520
• Country of Publication: United States
• Language: English

Related Subjects

tapered
pulse
tube
refrigerators
thermal
insulation
pulse-tube
refrigerator
maintained
optimally
varying
radius
suppress
convective
heat
loss
mass
flux
streaming
simple
cone
optimum
taper
angle
provide
sufficient
improvement
alternatively
function
axial
position
shaped
suppressed
pulse tube
mass flux
convective heat
heat loss
thermal insulation
provide sufficient
axial position
tube refrigerator
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