A comparative study on thermodynamic aspects of a mechanical drive and pneumatic drive GM cryocooler

Panda, Debashis; Behera, Suraj K.; Satapathy, Alok; Sahoo, Ranjit Kumar; Sarangi, Sunil

doi:10.1016/j.vacuum.2022.110938

Cited by 4 publications

(1 citation statement)

References 22 publications

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“…Benefiting from the compact structure, high reliability and low cost, GM type cryocoolers (including GM cryocoolers and GM pulse tube cryocoolers) are widely used in the field of superconducting cooling [ 1 , 2 ], dilution refrigerator (DR) [ 3 ], magnetic resonance imaging (MRI), scientific instruments [ 4 ] and semiconductor manufacturing [ [5] , [6] , [7] ]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation and exergy analysis of a single-stage GM cryocooler

Zhao

Wang²,

Chao

et al. 2023

Heliyon

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Section: Introductionmentioning

confidence: 99%

Numerical simulation and exergy analysis of a single-stage GM cryocooler

Zhao

Wang²,

Chao

et al. 2023

Heliyon

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Thermodynamic Characteristics of a Single Stage Pneumatically Driven Gifford–McMahon Refrigerator

Panda

Behera

Satapathy

et al. 2022

Journal of Thermal Science and Engineering Applications

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At present, the demand of high cooling capacity Gifford-McMahon (GM) refrigerators is increasing to cool the high-temperature superconducting magnets in cryogenic temperature range. Therefore, it is necessary to enhance the cooling capacity of existing refrigerators, which needs a thorough understanding of related thermodynamic phenomena. In this paper, thermodynamic processes of a GM refrigerator are analyzed and its performance is compared with Carnot cycle, and Brayton cycle with and without work recovery. Subsequently, a mathematical model has been formulated for a pneumatically-driven GM refrigerator by applying the fundamental principles of thermodynamics and mechanics. The model computes the influence of geometrical and operating parameters upon its refrigeration performance. Subsequently, the impact of valve opening intervals upon internal thermodynamic and dynamic processes is evaluated. The dynamic characteristics of the displacer motion, transient variation of mass flow, and pressure distribution are studied by the model for different values of idling angles. It is found that an increase in the idling angle of the refrigerator, reduces its cooling capacity. An experimental study has also been undertaken to corroborate the mathematical results.

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Influence of drive chamber discharging process on non-linear displacer dynamics and thermodynamic processes of a fluidic-driven Gifford-McMahon cryocooler

Panda

Kumar

Behera

et al. 2022

Journal of Non-Equilibrium Thermodynamics

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Continuous effort is made on Gifford-McMahon cryocoolers (GMC) to amplify its refrigeration power, so they can be used to cool the cryopumps, high Tc magnets and development of efficient small-scale hydrogen liquefiers, etc. The fluidic-driven GMC is considered to be more reliable and prominent candidate than the mechanically-driven GMC due to its structural simplicity and reliability. Nonetheless, cooling mechanism of the fluidic-driven GMC is complicated, as the displacer motion inside the displacer cylinder is simultaneously controlled by the pressure difference between drive chamber and compression/expansion chamber. Different paths of displacer can be traced inside the displacer cylinder for different drive-chamber discharging process, hence, pressure–volume power of compression and expansion chambers, and refrigeration power changes. A theoretical study is conducted in present paper to visualize the influence of drive-chamber discharging process on the thermodynamic characteristics of fluidic-driven GMC for the first time. Thermodynamic cycles are drawn at the expansion chamber of the fluidic-driven GMC for different values of drive-chamber discharging process for two types of valve timing arrangements. Energy and work loss behaviors in different components of the GMC are also analysed. Adequate experimental investigations have also been carried out on a fluidic-driven displacer type GMC to verify the simulation results.

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A comparative study on thermodynamic aspects of a mechanical drive and pneumatic drive GM cryocooler

Cited by 4 publications

References 22 publications

Numerical simulation and exergy analysis of a single-stage GM cryocooler

Numerical simulation and exergy analysis of a single-stage GM cryocooler

Thermodynamic Characteristics of a Single Stage Pneumatically Driven Gifford–McMahon Refrigerator

Influence of drive chamber discharging process on non-linear displacer dynamics and thermodynamic processes of a fluidic-driven Gifford-McMahon cryocooler

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