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Second law based modeling to optimum design of high capacity pulse tube refrigerators

Jafarian, A ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijrefrig.2008.07.005
  3. Publisher: 2009
  4. Abstract:
  5. The optimum design of a high capacity double inlet pulse tube refrigerator based on second law of thermodynamics has been presented in this paper. Second law is applied to calculate the work loss in the regenerator and to optimize the cryocooler performance. To investigate the behavior of the pulse tube refrigerator, mass and energy balance equations are applied to several control volumes of the cryocooler cycle. A complete system of conservation equations is employed to solve the regenerator analytically. The proposed model reports the cooling capacity of 110 W at 80 K cold end temperature at frequency of 50 Hz, orifice conductance of 0.4 and double inlet coefficient of 0.6, with 2.4 kW net power delivered to the gas. In this case, the entropy generation in the gas phase is dominant which is contributing more than 85% of the total lost work in the regenerator. The optimum thermal efficiency of 99.1% was achieved at a proper mesh number. However, the second law efficiency is reported to have an inverse behavior at this mesh number. © 2008 Elsevier Ltd and IIR
  6. Keywords:
  7. Calculation ; Design ; Cooling ; Cooling systems ; Cryogenic equipment ; Cryogenics ; Lithium batteries ; Optimization ; Refrigeration ; Regenerators ; Complete systems ; Conservation equations ; Control volumes ; Cooling capacities ; Cryorefrigerator ; Double inlets ; Entropy generations ; Gas phase ; High capacities ; Mass and energy balances ; Mesh numbers ; Optimum designs ; Performance ; Pulse tube ; Pulse tubes ; Second law efficiencies ; Second law of thermodynamics ; Second laws ; Thermal efficiencies ; Tubes (components)
  8. Source: International Journal of Refrigeration ; Volume 32, Issue 1 , 2009 , Pages 58-69 ; 01407007 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0140700708001321