Theory and Design of a Split-Type Stirling Cooler

• Main Authors: Chuang-RongChen, 陳創榮
• Other Authors: Chin-Hsiang Cheng
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/49611316586407848907

碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 101 === The present study is concerned with a split-type Stirling cooler by means of development of theoretical model as well as manufacturing of a prototype cooler that features a floating displacer along with a gas spring. In this study, the theoretical model consists of a thermodynamic model and a dynamic model. The thermodynamic model is used to calculate thermodynamic properties of working gas in all chambers, including pressures, gas masses, and temperatures, etc. The obtained pressures data are introduced into the dynamic model to determine instantaneous locations of the displacer so as to predict volumes of all the chambers at the next time step. The thermodynamic properties of the working gas in the chambers can then be calculated repeatedly. The temperature and energy variations are obtained from the theoretical model which taking into account effects of energy losses within the Stirling cooler. In addition, experimental data show that as using 1-atm air as the working gas and operated at a motor speed of 850 rpm, the prototype cooler is able to reach 253 K at the cold head. The experimental data are further compared with the theoretical predictions to fairly assess the effects of key parameters and design indices.