Optimal Design of a Pulse-Tube Stirling Engine by Simplified Conjugate Gradient Method

• Main Authors: Quan-HuiChen, 陳權輝
• Other Authors: Chin-Hsiang Cheng
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/89989533836983152298

碩士 === 國立成功大學 === 航空太空工程學系 === 103 === In this study, simplified conjugate gradient method is utilized for investigation of optimal performance of a pulse-tube Stirling engine. Design of new parameter is searched for optimization by the theoretical model. The optimal analysis not only searches simple power or thermal efficiency but seeks for both power output and thermal efficiency at the same time in the optimization. Adding the weighting ratio into the objective function, a result for the multi-objective condition can be tested and verified by simplified conjugate gradient method. By combining the thermodynamic model with simplified conjugate gradient method, six geometric parameters are optimized. A prototype engine was revised according to the optimal parameters, and the output of it could be increase from 22.35 W to 31.83 W under the initial pressure of 1 atm and heating temperature of 1000˚C. The toal performance improvement is 42%.