Performance Study on a Two-Stage 4 K Pulse Tube Cooler

Wang, C.; Thummes, G.; Heiden, C.

doi:10.1007/978-1-4757-9047-4_259

Cited by 17 publications

(4 citation statements)

References 11 publications

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“…• Prediction (case a in Fig.4) Fig.4) ~-Prediction (case c in Fig.4) 1,0 • • experimental data [5] , 2nd-stage temperature / K Fig.7 The predicted cooling power versus cold end temperature of the 2nd-stage 6.0 with the experimental results that include measurements of the temperature profile and the cooling power of 2nd- [5] stage regenerator . The best cooler performance was achieved with a three-layer structure of the 2nd-stage regenerator matrix, filled with ErNio.gCooA grains in the lower 40%, Er3Ni spheres in the middle 27% and lead spheres in the upper 33% of the regenerator length.…”

Section: Main Structure Parameters Predicted Results and Discussionmentioning

confidence: 98%

A computational model for two-stage 4K-pulse tube cooler: Part II. Predicted results

Waele

2002

J. of Therm. Sci.

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The internal physical processes and performance of a two-stage pulse tube cooler operating at 4 K-temperature region are numerically analyzed by a new mixed Eulerian-Lagrangian computational model. The detailed timevariations of gas temperature, pressure, mass flow rate, enthalpy flow in a cycle, in the first and the second-stage regenerators are presented in the paper. The behavior of the various gas elements, which enter the pulse tube from its cold end has been revealed and discussed. More attention is paid to the effects of different regenerative materials on the performance of the 4 K two-stage pulse tube cooler.

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Section: Main Structure Parameters Predicted Results and Discussionmentioning

confidence: 98%

A computational model for two-stage 4K-pulse tube cooler: Part II. Predicted results

Waele

2002

J. of Therm. Sci.

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“…The developed double inlet pulse tube refrigerator ͑DIPTR͒ achieved a temperature of 25 K. Since then, various pulse tube refrigerators have been developed including an inertance pulse tube refrigerator ͑IPTR͒. In recent pulse tube refrigerator designs, temperatures even below the condensation point of helium are attainable, 5 although the pulse tube refrigerator has no moving parts at the cold end. In recent pulse tube refrigerator designs, temperatures even below the condensation point of helium are attainable, 5 although the pulse tube refrigerator has no moving parts at the cold end.…”

Section: Introductionmentioning

confidence: 99%

Acoustic impedance measurements of pulse tube refrigerators

Iwase

Biwa

Yazaki

2010

Journal of Applied Physics

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Articles you may be interested inBarocaloric effect and the pressure induced solid state refrigerator Complex acoustic impedance is determined in a prototype refrigerator that can mimic orifice-type, inertance-type, and double inlet-type pulse tube refrigerators from simultaneous measurements of pressure and velocity oscillations at the cold end. The impedance measurements revealed the means by which the oscillatory flow condition in the basic pulse tube refrigerator is improved by additional components such as a valve and a tank. The working mechanism of pulse tube refrigerators is explained based on an electrical circuit analogy.

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“…They inserted a silk screen in a pulse tube to decrease the effect of gravity. Kasthurirengan et al [9,14] also adopted a filling silk screen to decrease the gravity effect. Shiraishi et al [10,11] tried to import additive direct current to suppress the gravity effects.…”

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confidence: 99%

Suppression of Natural Convection in a Thermoacoustic Pulse Tube Refrigerator

Han¹,

Liu²

2013

Chinese Phys. Lett.

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The effects of gravity on the efficiency of thermoacoustic engines are investigated theoretically and experimentally, especially for thermoacoustic pulse tube refrigerators. The significant effects of gravity are found to be due to the presence of natural convection in the thermoacoustic pulse tube when the hot side of the tube is lower than the cold side. This kind of natural convection influences and reduces the efficiency of the thermoacoustic working system. Thus, how to suppress this natural convection becomes important for increasing the efficiency of thermoacoustic engines. Unlike the method of inserting a silk screen in a pulse tube, the present study uses a numerical simulation method to research the natural convection in pulse tubes, and we try to change the shape of the pulse tube to suppress this convection.

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Performance Study on a Two-Stage 4 K Pulse Tube Cooler

Cited by 17 publications

References 11 publications

A computational model for two-stage 4K-pulse tube cooler: Part II. Predicted results

A computational model for two-stage 4K-pulse tube cooler: Part II. Predicted results

Acoustic impedance measurements of pulse tube refrigerators

Suppression of Natural Convection in a Thermoacoustic Pulse Tube Refrigerator

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