Numerical simulation of a GM-type pulse tube cryocooler system: Part II. Rotary valve and cold head. (January 2017)

• Record Type: Journal Article
• Authors: Liu, Dongli; Dietrich, Marc; Thummes, Guenter; Gan, Zhihua
• Is Part Of: Cryogenics. Volume 81(2017)
• Page Start: 100
• Page End: 106
• Publication Date: 2017-01
• Subjects: GM-type pulse tube cryocooler -- Simulation -- Rotary valve -- Compressor; Low temperature engineering -- Periodicals; Low temperature research -- Periodicals; 536.56
• DOI: 10.1016/j.cryogenics.2016.11.006
• Languages: English
• ISSNs: 0011-2275

Abstract

Highlights: A method to characterise a rotary valve is proposed. A complete GMPTC simulation model is built and verified. The model can predict the GMPTC's performance at various working conditions. The exergy loss distribution of the GMPTC system is presented quantitatively. The proposed simulation method is useful to optimise a GMPTC system. Abstract: A simplified model to characterise a rotary valve is proposed. This model is used inside a complete GM-type pulse tube cryocooler (GMPTC) simulation including the compressor, rotary valve and cold head. The verification of the model is presented including the pressure wave, cooling power and COP by comparing the simulation results to the experimental data of an existing GMPTC system. The exergy losses produced by the compressor, rotary valve and cold head are discussed. This paper is aimed to propose a simulation method which can be applied to analyse and optimise a GMPTC cold head by using the characteristics of a specific compressor and rotary valve.