Results 131 to 140 of about 852,283 (182)

Optimization of Miniature Pulse-Tube Cryocoolers

Advanced Energy Systems, 1999
Abstract This work introduces optimization techniques for designing pulse-tube coolers with the focus on coolers of smaller size. Methods are presented to select two geometric design parameters: pulse-tube length to regenerator length ratio, and system length to diameter ratio. The optimum values of these parameters are a function of the
J. M. Shire, A. Mujezinovic, P. E. Phelan   +2 more
openaire   +1 more source

Raytheon advanced pulse-tube cryocoolers

SPIE Proceedings, 2016
Since the 1970s, Raytheon has developed, built, tested and integrated high performance cryocoolers. Our versatile designs for single and multi-stage cryocoolers provide reliable operation for temperatures from 10 to 200 Kelvin with power levels ranging from 50 W to nearly 600 W.
Ted Conrad, Ryan Yates, Daniel Kuo, Brian Schaefer, Matt Arnoult   +4 more
openaire   +1 more source

Miniature space pulse tube cryocoolers

Cryogenics, 1999
Abstract Cryogenic coolers for use in space on small satellites require low power and minimum weight. The need for exceptional reliability in a space cooler is made even more critical on small satellites since cooler redundancy is often not an option due to weight and power constraints. In this paper we report on our space qualified pulse tube cooler
E Tward, C.K Chan, C Jaco, J Godden, J Chapsky, P Clancy   +5 more
openaire   +1 more source

A pulse tube cryocooler with a cold reservoir

Cryogenics, 2013
Abstract Phase difference between pressure wave and mass flow is decisive to the cooling capacity of regenerative cryocoolers. Unlike the direct phase shifting using a piston or displacer in conventional Stirling or GM cryocoolers, the pulse tube cyocooler (PTC) indirectly adjusts the cold phase due to the absence of moving parts at the cold end. The
Zhang, Xiaobin, Zhang, Kaihao, Qiu, Limin, Gan, Zhihua, Shen, Xian, Xiang, Shijun   +5 more
openaire   +2 more sources

Pulse tube cryocooler for IR applications

SPIE Proceedings, 2005
Pulse tube cryocoolers (PTC) can be regarded as the next step in the development of the Stirling cooler. The major advantage vs. the Stirling cooler is the omission of any moving part in the cold head, resulting in significantly increased MTTF. Further advantages are higher mechanical robustness and stability and the potential for cost reduction.
H. Korf, I. Ruhlich, M. Mai, G. Thummes
openaire   +1 more source

A Pulse Tube Cryocooler for Telecommunications Applications

2002
Superconducting Core Technologies (SCT) is developing a pulse tube cryocooler designed for cooling telecommunications equipment in outdoor installations. The cooler is based on a moving-magnet, flexure-bearing-supported linear compressor that is both inexpensive and scalable to a variety of power levels.
J.L. Martin, J.A. Corey, C.M. Martin
openaire   +1 more source

HIGH PERFORMANCE PULSE TUBE CRYOCOOLERS

AIP Conference Proceedings, 2008
Lockheed Martin's Advanced Technology Center has been developing pulse tube cryocoolers for more than ten years. Recent innovations include successful testing of four-stage coldheads, no-load temperature below 4 K, and the recent development of a high-efficiency compressor.This paper discusses the predicted performance of single and multiple stage ...
J. R. Olson, E. Roth, P. Champagne, B. Evtimov, T. C. Nast, J. G. Weisend, John Barclay, Susan Breon, Jonathan Demko, Michael DiPirro, J. Patrick Kelley, Peter Kittel, Arkadiy Klebaner, Al Zeller, Mark Zagarola, Steven Van Sciver, Andrew Rowe, John Pfotenhauer, Tom Peterson, Jennifer Lock   +19 more
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Pulse Tube Cryocooler Dynamics and Simulation

Volume 1: Advances in Aerospace Technology; Energy Water Nexus; Globalization of Engineering; Posters, 2011
The Pulse Tube cryocooler is a relatively new device with a promising future in space grade cryogenics. Unlike many active cryocoolers, the pulse tube is a regenerative type cooler with no cold end moving parts. The lack of cold end moving parts permits it to be used in application with mechanically sensitive or high fidelity components. The pulse tube
Christopher Davis, Nesrin Sarigul-Klijn
openaire   +1 more source

Pulse Tube Cryocoolers

2003
This paper presents a review of the pulse tube refrigerator from its inception in the mid-1960s up to the present. Various factors are discussed which brought it from a laboratory curiosity to the point where it is now the most efficient of all cryocoolers (cryogenic refrigerator) for temperatures between about 60 and 120 K, and it is reliable enough ...
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Performance of a Miniature Pulse Tube Cryocooler

AIP Conference Proceedings, 2006
Fuji Electric Group has developed a miniature pulse tube cryocooler (PTC) of U‐shaped configuration with a specific cooling capacity of 2W at 70K and requiring 100W of electrical input power. The emphasis has been on compactness, light weight, high performance, high reliability and low cost.
openaire   +1 more source