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Model for transient behavior of pulse tube cryocooler
Cryogenics, 2011Abstract This article describes an investigation of the transient behavior of a small (2.0 W at 85 K) pulse tube cryocooler operating at 120 Hz with an average pressure of 3.5 MPa, capable of relatively fast cool-down from ambient to about 60 K. In a series of experiments, the cold end temperature was measured as a function of time in a complete cool-
Gershon Grossman +3 more
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Development of the Miniature Pulse Tube Cryocooler
AIP Conference Proceedings, 2004Fuji Electric has developed a pulse tube cryocooler (PTC) with in‐line configuration with a cooling capacity of 3 W at 70 K and requiring 100 W of electrical input power. The emphasis has been on compactness, lightweight, high performance and low cost.
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Conducted EMI Reduction on the Pulse Tube Cryocooler
IEEE Transactions on Magnetics, 2009Pulse tube (PT) cryocoolers can be used to cool SQUIDs, however their electromagnetic interference (EMI) through the conducted high frequency noise currents are normally too large to operate SQUIDs. In this paper, high frequency noise currents of a pulse tube cryocooler system are simultaneously observed at several critical points to analyze conducting
M.J. Eshraghi +3 more
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Intermediate cooling from pulse tube and regenerator in a 4K pulse tube cryocooler
Cryogenics, 2008Abstract This paper introduces intermediate cooling by thermally attaching heat exchangers on the second stage pulse tube and regenerator in a commercial 4 K pulse tube cryocooler. Due to the large enthalpy flow in the 2nd stage pulse tube and regenerator, both intermediate heat exchangers on the pulse tube and regenerator can provide cooling ...
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Development of a Light Weight Pulse-Tube Cryocooler
AIP Conference Proceedings, 2004Examinations were done of a small‐size Stirling‐type pulse‐tube cryocoolers developed for cooling high‐temperature superconductor devices and semiconductor sensors. To satisfy the requirements for use in such devices, the Stirling‐type pulse‐tube cryocooler WE‐SP2000, the conventional model, needed further improvement.
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Pulse tube cryocoolers for cooling infrared sensors
SPIE Proceedings, 2000This paper reviews recent advances in pulse tube cryocoolers and their application for cooling infrared sensors. There are many advantages of pulse tube cryocoolers over Stirling cryocoolers associated with the absence of moving parts in the cold head. Efficiencies have been improved considerably in the last few years to where they equal or even exceed
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Pulse Tube Refrigeration–A New Type of Cryocooler
Japanese Journal of Applied Physics, 1987A variation of the Stirling cryocooler, known as a pulse tube refrigerator, requires only one moving part - a pressure wave generator at room temperature. The Stirling cryocooler requires in addition a moving displacer at low temperatures to cause a phase shift between pressure and mass flow rate that leads to a refrigeration effect.
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Linearized theory for pulse tube cryocooler performance
AIAA Journal, 1994A linearized theory, which assumes small pressure perturbations, is presented for the performance of orificetype pulse tube cryocoolers. The effect of gas-to-wall heat transfer within the pulse tube is included. Analytical expressions are derived for pulse tube flow properties and refrigeration power as functions of parameters K, Hl9 and v, which ...
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Efficient 10 K Pulse Tube Cryocoolers
2005Two 10 K pulse tube cryocoolers, Models PT805 and PT810, have been developed and commercialized at Cryomech to provide cooling from 8 K to 20 K. The PT805 provides 3.5 W at 10 K and 48 W at 80 K, simultaneously, for 4.6 kW power input. The PT810 provides 10 W at 10 K and 40 W at 49 K, simultaneously, for 7.6 kW power input. These pulse tube cryocoolers
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