Development of a Space-Type 4-Stage Pulse Tube Cryocooler for Very Low Temperature

2006 ◽  
Author(s):  
J. R. Olson
Keyword(s):  
Low Temperature ◽  
Pulse Tube ◽  
Pulse Tube Cryocooler ◽  
Very Low Temperature

scholarly journals Experimental Study of an Aerospace Low Temperature Refrigerator Cooled by a Pulse-tube Cryocooler

2015 ◽  
Vol 67 ◽  
pp. 398-404 ◽  
Author(s):  
Jiajia Wen ◽  
Yinong Wu ◽  
Ankuo Zhang ◽  
Baoyu Yang ◽  
Hua Zhang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Low Temperature ◽  
Pulse Tube ◽  
Pulse Tube Cryocooler

Theoretical and experimental investigation of pressure drop and refrigeration effect in pulse tube cryocooler

2015 ◽  
Vol 230 (11) ◽  
pp. 1910-1920
Author(s):  
AD Badgujar ◽  
MD Atrey
Keyword(s):  
Pressure Drop ◽  
Low Temperature ◽  
Mesh Size ◽  
Input Power ◽  
Design Parameters ◽  
Experimental Investigations ◽  
Pulse Tube ◽  
Isothermal Model ◽  
Research Activities ◽  
Pulse Tube Cryocooler

The design of a highly efficient pulse tube cryocooler (PTC) is a subject of recent research activities. The PTC performance depends on various operating and design parameters. Regenerator is one of the very important components of the PTC which decides the low temperature that the PTC can attain. Efficiency of regenerator should be high enough, 96% or above, in order to reach very low temperature while the pressure drop in the regenerator is one of the parameters which needs to be analysed in detail. In the present work, theoretical and experimental investigations are carried out on two different single stage U type PTC. The volumes of regenerators and pulse tubes, in both the cases are kept same while the length to diameter (L/D) ratios of regenerators are changed. Investigations are carried out on these PTC with respect to pressure drop in the regenerator and net refrigeration effect obtained from the PTC at 80 K. The pressure drop increases from 0.29 bar to 2.07 bar with an increase in L/D ratio from 1.93 to 9, resulting in decrease in refrigeration effect from 6.1 W to 1.7 W at 80 K with 300 W input power. The study is further extended to understand the effect of coarse size stainless steel mesh size in the regenerator. Coarse size meshes filled up to 60% of regenerator length improved the refrigeration effect from 1.7 W to 2.8 W; however, further filling degrades the performance of the PTC. The experimental results are compared with theoretical results obtained by Sage software and Isothermal model.

scholarly journals Design and analysis of a pulse tube cryocooler for low temperature fridge

2019 ◽  
Vol 502 ◽  
pp. 012028
Author(s):  
N L Wang ◽  
M G Zhao ◽  
J Quan ◽  
H L Chen ◽  
J T Liang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Pulse Tube ◽  
Pulse Tube Cryocooler

Pulse-Tube Refrigeration

1964 ◽  
Vol 86 (3) ◽  
pp. 264-268 ◽  
Author(s):  
W. E. Gifford ◽  
R. C. Longsworth
Keyword(s):  
Low Temperature ◽  
Low Temperatures ◽  
Room Temperature ◽  
Experimental Models ◽  
Pulse Tube ◽  
Thomson Effect ◽  
Test Results ◽  
Simple Effect ◽  
Very Low Temperature ◽  
Moving Parts

A very simple effect makes it possible to construct very low temperature refrigerators without the use of low temperature moving parts or the Joule-Thomson effect. The effect, which occurs in many places and is frequently ignored, is described in detail, along with means for using it to build refrigerators capable of achieving low temperatures. A description of experimental models and test results is also included. A temperature 218 deg F below room temperature has been achieved.

RESISTIVITY OF TmSe UNDER PRESSURE AT VERY LOW TEMPERATURE

1980 ◽  
Vol 41 (C5) ◽  
pp. C5-177-C5-180
Author(s):  
J. Flouquet ◽  
P. Haen ◽  
F. Holtzberg ◽  
F. Lapierre ◽  
J. M. Mignot ◽  
...  
Keyword(s):  
Low Temperature ◽  
Very Low Temperature

Can fluorosyl hydride be formed or even prepared?

1990 ◽  
Vol 55 (4) ◽  
pp. 890-895
Author(s):  
Rudolf Zahradník ◽  
B. Andes Hess
Keyword(s):  
Low Temperature ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Solid Matrix ◽  
Vibrational Characteristics ◽  
Very Low Temperature

HFO and HClO (fluorosyl and chlorosyl hydrides) and isomeric molecules HOF and HOCl (hypofluorous and hypochlorous acids) have been studied theoretically. On the basis of nonempiracal quantum chemical calculations (MP2, MP4 and CCD/6-311G**) geometry, energy and vibrational characteristics are analyzed and it is concluded that there is a poor chance to observe formation of HFO. Possibly, bombardment of HF in a solid matrix by 16O could lead at very low temperature to HFO.

scholarly journals Silver‐Promoted High‐Performance (Ag,Cu)(In,Ga)Se 2 Thin‐Film Solar Cells Grown at Very Low Temperature

Solar RRL ◽  
2021 ◽  
pp. 2100108
Author(s):  
Shih-Chi Yang ◽  
Jordi Sastre ◽  
Maximilian Krause ◽  
Xiaoxiao Sun ◽  
Ramis Hertwig ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Low Temperature ◽  
High Performance ◽  
Thin Film Solar Cells ◽  
Very Low Temperature

Investigation on the cool-down speed of Stirling type pulse tube cryocooler with inertance tube

2021 ◽  
Author(s):  
Cungang Yan ◽  
Wei Dai ◽  
Yanang Wang ◽  
Xiaotao Wang ◽  
John M. Pfotenhauer ◽  
...  
Keyword(s):  
Pulse Tube ◽  
Pulse Tube Cryocooler
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