Conference proceeding
Experimental and Numerical Characterization of an Orifice type Cryogenic Pulse Tube Refrigerator
PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, 2011, VOL 8, pp.909-918
01 Jan 2012
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
An orifice type pulse tube refrigerator (OPTR) was designed, built and operated to provide cryogenic cooling. The OTPR is a travelling wave thermoacoustic refrigerator that operates on a modified reverse Stirling cycle. We consider a system that is comprised of a pressure wave generator (a linear motor), an aftercooler heat-exchanger, a regenerator (comprising of a porous structure for energy separation), a pulse tube (in lieu of a displacer piston as found in Stirling refrigerators) with a cold and a warm heat-exchanger at its two ends, a needle-type orifice valve, an inertance tube and a buffer volume. The experimental characterization is done at various values of mean pressure of helium similar to 0.35 MPa - 2.2 MPa), amplitude of pressure oscillations, frequency of operation and size of orifice opening. A detailed time-dependent axisymmetric computational fluid dynamic (CFD) model of the OPTR is simulated to predict the performance of the OPTR. In the CFD model, the continuity, momentum and energy equations are solved for both the refrigerant gas (helium) and the porous media regions (the regenerator and the three heat-exchangers) in the OPTR. An accurate representation of heat transfer in the porous media is achieved by employing a thermal non-equilibrium model to couple the gas and solid (porous media) energy equations. In the future, a validated computational model can be used for system improvement and optimization.
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Details
- Title
- Experimental and Numerical Characterization of an Orifice type Cryogenic Pulse Tube Refrigerator
- Creators
- Dion Savio Antao - Drexel Univ, Dept Mech Engn & Mech, Philadelphia, PA 19104 USABakhtier Farouk - Drexel UniversityASME
- Publication Details
- PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, 2011, VOL 8, pp.909-918
- Conference
- ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION 2011
- Publisher
- Amer Soc Mechanical Engineers
- Number of pages
- 10
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Identifiers
- 991019170374704721
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InCites Highlights
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- Web of Science research areas
- Acoustics
- Engineering, Mechanical