4 K pulse tube refrigerator and excess cooling power

2002 ◽  
Author(s):  
Shaowei Zhu
Keyword(s):  
Cooling Power ◽  
Pulse Tube ◽  
Pulse Tube Refrigerator

scholarly journals Modeling and Miniaturization of the Thermoacoustically Driven IPTR to Encourage Sustainable Energy

2020 ◽  
Author(s):  
Lavari
Keyword(s):  
Numerical Simulation ◽  
Sustainable Energy ◽  
Superconducting Magnets ◽  
Heat Engine ◽  
New Method ◽  
Cooling Power ◽  
Pulse Tube ◽  
Average Pressure ◽  
Pulse Tube Refrigerator ◽  
Moving Parts

The Thermoacoustic Stirling Heat Engine(TASHE) designed by Backhaus, a device without moving parts which operates at a frequency of 85 Hz with an average pressure of 3 MPa that is capable of using sustainable energies, is applied to run an Inertance Pulse Tube Refrigerator(IPTR) with 1 W cooling power at 90 K. The coupling of these devices caused to eliminate all moving parts as well as miniaturizing the refrigerator to use for cooling superconducting magnets for MRI systems. A new method for the design of the IPTR performed by using numerical simulation of REGEN3.3. Moreover, to have a better vision of the overall configuration of IPTR and verify the Results of REGEN3.3, DeltaEC is used as an auxiliary software. Fortunately, both software results matched perfectly, and the performance of the IPTR was acoustically and thermodynamically ideal.

Performance Analysis and Optimization of High Capacity Pulse Tube Refrigerator

2010 ◽  
Author(s):  
Amir R. Ghahremani ◽  
F. Roshanghalb ◽  
R. Jahanbakhshi ◽  
M. H. Saidi ◽  
S. Kazemzadeh Hannani
Keyword(s):  
High Capacity ◽  
Cooling Capacity ◽  
Cooling Power ◽  
Operating Parameters ◽  
Geometrical Parameters ◽  
Average Charge ◽  
Pulse Tube ◽  
Pulse Tube Refrigerator ◽  
Aspect Ratios ◽  
Pulse Tube Refrigerators

High capacity pulse tube refrigerator (HCPTR) is a new generation of cryocoolers tailored to provide more than 250 W of cooling power at cryogenic temperatures. The most important characteristics of HCPTR when compared with other types of pulse tube refrigerators are a powerful pressure wave generator, and an accurate design. In this paper the influence of geometrical and operating parameters on the performance of a double inlet pulse tube refrigerator (DIPTR) is studied. The DIPTR is modeled applying the nodal analysis technique, using mass, momentum and energy conservation equations. The model is able to compute instantaneous flow field throughout the system and calculate cooling capacity and COP. The model is validated with the existing experimental data. To perform the optimized mode of operation, the influence of both geometrical and operating parameters on cooling capacity and COP is investigated. The key geometrical parameters considered in this paper are aspect ratios of regenerator and tube section, length ratio of regenerator and tube, and type of screen mesh. The main operating parameters considered are average charge pressure, and position of opening of orifice and bypass. As a result of this optimization a new configuration of HCPTR is proposed. This configuration provides 300 W at 80 K cold end temperature with a frequency of 50 Hz and COP of 0.054.

Investigation of a Single Stage Four-Valve Pulse Tube Refrigerator for High Cooling Power

2002 ◽  
pp. 327-336 ◽  
Author(s):  
T. Schmauder ◽  
A. Waldauf ◽  
M. Thürk ◽  
R. Wagner ◽  
P. Seidel
Keyword(s):  
Single Stage ◽  
Cooling Power ◽  
Pulse Tube ◽  
Pulse Tube Refrigerator

D09 4K pulse tube refrigerator with higher cooling power at first stage

2001 ◽  
Vol 2001.5 (0) ◽  
pp. 137-140 ◽  
Author(s):  
Shaowei ZHU ◽  
Masafumi NOGAWA ◽  
Shinji KATSURAGAWA ◽  
Masahiro ICHIKAWA ◽  
Tatsuo INOUE
Keyword(s):  
Cooling Power ◽  
Pulse Tube ◽  
Pulse Tube Refrigerator

Visualization Study of Oscillating Flow Inside a Pulse Tube Refrigerator

1998 ◽  
pp. 2023-2030 ◽  
Author(s):  
N. Nakamura ◽  
M. Shiraishi ◽  
K. Seo ◽  
M. Murakami
Keyword(s):  
Oscillating Flow ◽  
Pulse Tube ◽  
Pulse Tube Refrigerator
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