Numerical analysis of inertance pulse tube cryocooler with a modified reservoir

Cryogenic Engineering Conference 2017

材料科学;物理学

Abraham, Derick^1 ; Damu, C.^2 ; Kuzhiveli, Biju T.^1

Centre for Advanced Studies in Cryogenics (CASC), National Institute of Technology Calicut, Kerala

673601, India^1

Visvesvaraya Technological University, Research Centre SIT, Belagavi Karnataka

590018, India^2

关键词: Cooling applications;    Flow straightener;    Hermetically sealed;    High reliability;    Linear compressors;    Pulse tube cryocoolers;    Reservoir volume;    Steady pressure;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/278/1/012154/pdf
DOI  :  10.1088/1757-899X/278/1/012154

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Pulse tube cryocoolers are used for cooling applications, where very high reliability is required as in space applications. These cryocoolers require a buffer volume depending on the temperature to be maintained and cooling load. A miniature single stage coaxial Inertance Pulse Tube Cryocooler is proposed which operates at 80 K to provide a cooling effect of at least 2 W. In this paper a pulse tube cryocooler, with modified reservoir is suggested, where the reverse fluctuation in compressor case is used instead of a steady pressure in the reservoir to bring about the desired phase shift between the pressure and the mass flow rate in the cold heat exchanger. Therefore, the large reservoir of the cryocooler is replaced by the crank volume of the hermetically sealed linear compressor, and hence the cryocooler is simplified and compact in size. The components of the cryocooler consist of a connecting tube, aftercooler, regenerator, cold heat exchanger, flow straightener, pulse tube, warm heat exchanger, inertance tube and the modified reservoir along with the losses were designed and analyzed. Each part of the cryocooler was analysed using SAGE v11 and verified with ANSYS Fluent. The simulation results clearly show that there is 50% reduction in the reservoir volume for the modified Inertance pulse tube cryocooler.