Numerical Investigation on a 70Hz Pulse Tube Micro-cryocooler

In this paper, a 70Hz pulse tube micro cryocooler (PTMC) driven by two opposite linear generators has been studied using linear theory of thermoacoustic. In contrast to conventional thermodynamic calculation method the results of a small-scale PTC as a thermoacoustic system were obtained. Numerical...

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Bibliographic Details
Published in:Procedia engineering 2016, Vol.152, p.314-320
Main Authors: Nekrasova, S.O., Zinovyev, E.A., Dovgyallo, A.I.
Format: Article
Language:English
Subjects:
pulse tube cryocooler
small-scale cooling system
thermoacoustic linear theory
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Summary:In this paper, a 70Hz pulse tube micro cryocooler (PTMC) driven by two opposite linear generators has been studied using linear theory of thermoacoustic. In contrast to conventional thermodynamic calculation method the results of a small-scale PTC as a thermoacoustic system were obtained. Numerical simulation was conducted to design the system and optimum structure parameters were obtained. With operating condition of 2.5MPa mean pressure and 70Hz operating frequency, a cooling power of 8W at 77K and a relative Carnot efficiency of 21% were achieved. In order to prove the applicability of numerical simulation using linear theory of thermoacoustic to such small-scale cooling system and to better understand the energy conversion characteristics of the system, distributions of key parameters such as acoustic work, exergy were presented and discussed.
ISSN:1877-7058
1877-7058
DOI:10.1016/j.proeng.2016.07.709