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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

Theoretical Analysis of a Pulse-tube Stirling Cooler




Abstract

In this study, a theoretical analysis and a prototype of a pulse-tube Stirling cooler is developed. The pulse-tube Stirling cooler is a very attractive in the field which cryogenic cooling is required, and with several significant advantages such as low noise, reliability, low cost, low vibration, and the mechanism is simple which only contain a piston as a moving part. In the theoretical analysis model, the cooler is divided into seven chambers, namely compressor, cooler, regenerator, cold head, pulse-tube, second cooler and reservoir. The analysis starts from the motion of the piston which is driven by the linear motor. After that, thermodynamic properties in each chamber vary with the change of the compression chamber volume. Such as, instantaneous temperatures, pressures, heat transfer rate, and the mass of the working fluid could be predicted by the theoretical analysis which mass conservation and energy conservation are both considered, and also the effects of heat losses and pressure losses are considered, too. Also, a prototype pulse-tube Stirling cooler is charge to 5 atm with helium as working gas, and the zero-loading temperature could achieve to 215K at the operating frequency of 35 Hz. Respectively, the prediction result from the theoretical analysis is 196K under the same condition. And the difference between the prediction and the experimental measurement is about 8.8% only, which means the prediction are

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