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Performance analysis and optimization of high capacity pulse tube refrigerator
, Article Cryogenics ; Volume 51, Issue 4 , 2011 , Pages 173-179 ; 00112275 (ISSN) ; Saidi, M. H ; Jahanbakhshi, R ; Roshanghalb, F ; Sharif University of Technology
2011
Abstract
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 to 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 model is validated with the existing experimental data. As a result of this optimization, a new configuration of HCPTR is proposed. This configuration provides 335 W at 80 K cold end temperature with a frequency of 50 Hz...
Performance analysis and optimization of high capacity pulse tube refrigerator
, Article ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, ESDA2010, 12 July 2010 through 14 July 2010 ; Volume 1 , 2010 , Pages 257-263 ; 9780791849156 (ISBN) ; Roshanghalb, F ; Jahanbakhshi, R ; Saidi, M. H ; Kazemzadeh Hannani, S ; Sharif University of Technology
Abstract
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...
Two dimensional oscillatory flow analysis in the pulse tubes
, Article 2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008, Boston, MA, 31 October 2008 through 6 November 2008 ; Volume 10, Issue PART A , 2009 , Pages 685-690 ; 9780791848715 (ISBN) ; Taheri, M ; Jahanbakhshi, R ; Jafarian, A ; Hannani, S. K ; Sharif University of Technology
2009
Abstract
Recently a great attention has been given to the oscillatory flow modeling in the pulse tube cryocoolers. In this paper multi dimensioning effects of the fluid flow in the pulse tube are investigated. A complete system of governing equations is solved to report the flow field, friction coefficient and Nusselt number in the pulse tube. Harmonic approximation technique is employed to derive an analytical solution. In this respect, mass, momentum and energy balance equations as well as the equation of state for ideal gas are transformed by implementing the harmonic approximation technique. The present model is able to predict the behavior of the two dimensional compressible oscillatory flow in...