Results 1 to 10 of about 852,283 (182)
A high efficiency hybrid stirling-pulse tube cryocooler
AIP Advances, 2015 This article presented a hybrid cryocooler which combines the room temperature displacers and the pulse tube in one system. Compared with a traditional pulse tube cryocooler, the system uses the rod-less ambient displacer to recover the expansion work ...
Xiaotao Wang +6 more
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Vibration Property of a Cryogenic Optical Resonator within a Pulse-Tube Cryostat [PDF]
Sensors, 2021 Cryogenic ultrastable laser cavities push laser stability to new levels due to their lower thermal noise limitation. Vibrational noise is one of the major obstacles to achieve a thermal-noise-limited cryogenic ultrastable laser system. Here, we carefully
Yanxia Ye +6 more
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Stirling pulse tube cryocooler using an active displacer [PDF]
Cryogenics, 2018 An in-line pulse tube cryocooler with an active displacer has been built and its performance has been examined in detail by experimental measurements and numerical modelling. An active displacer allows the mass flow at the cold end to be easily adjusted for optimum performance.
Abolghasemi, M +4 more
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Study on the impedance characteristics of a high-capacity pulse tube cryocooler
Energy Reports, 2022 Stirling-type pulse tube cryocoolers are used in many applications such as military facilities, aerospace devices and superconductive systems. A major problem in improving its energy conversion efficiency is how to achieve a better impedance matching. In
Xiaokuan You +4 more
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Performance analysis and exergy assessment of an inertance pulse tube cryocooler
Journal of Thermal Engineering, 2023 The world is facing the problems of the energy crisis. Thermal analysis and energy conservation of the engineering devices help to improve their performance.
Prateek MALWE +4 more
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Traveling-wave thermoacoustic refrigerator with curved and tapered surfaces to minimize streaming
Invention Disclosure, 2022 The present article describes a traveling-wave thermoacoustic refrigeration system driven by a thermoacoustic heat engine. The coupled engine-refrigerator system consists of a resonator tube, which the thermoacoustic engine and thermoacoustic ...
Mohsen Bahrami, Fathollah Ommi
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ULTIMATE TEMPERATURE OF PULSE TUBE CRYOCOOLERS [PDF]
AIP Conference Proceedings, 2010 An ideal pulse tube cryocooler using an ideal gas can operate at any temperature. This is not true for real gasses. The enthalpy flow resulting from the real gas effects of 3He, 4He, and their mixtures in ideal pulse tube cryocoolers puts limits on the operating temperature of pulse tube cryocoolers.
P. Kittel, J. G. Weisend
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Design of the glass pulse-tube cryocooler
IOP Conference Series: Materials Science and Engineering, 2017 With the purpose of generating the curiosity of the public, a pulse-tube cryocooler with regenerator, pulse-tube, inertance tube and reservoir made of glass has been designed constructed and operated. The dimensions of the glass regenerator have been determined using REGEN3.3 [1] from given parameters of the conductive porous medium inside of the ...
Z Jiang, C Bernhardt, J M Pfotenhauer
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Engineering Applications of Computational Fluid MechanicsTo look inside a pulse tube for streaming effects beyond 5–6 Hz is not possible experimentally. Therefore, CFD is a reliable tool for observing the streaming effects occurring in a cryocooler.
Rajendra Kumar +2 more
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Alexandria Engineering Journal, 2015 In this paper, new relations for calculating heat transfer and pressure drop characteristics of oscillatory flow through wire-mesh screen regenerator such as Darcy permeability, Forchheimer’s inertial coefficient, and heat transfer area per unit volume ...
A.A. Boroujerdi, M. Esmaeili
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