实际热声热机微热力学循环性能优化

Performance optimization of an actual thermoacoustic engine micro-cycle

分析实际热声热机微热力学循环中的诸多因素,运用有限时间热力学方法,导出实际热声热机微热力学循环的效率与输出声功率的最优关系,分析不可逆程度因子及热漏系数对此最优关系的影响.结果表明:实际热声热机微热力学循环中存在一最佳温度振荡值,使循环在得到高效率的同时得到高输出功率,并由数值计算认证了这一结论.

Using finite time thermodynamics, we analysed many factors of an actual thermoacoustic engine micro-cycle and derived the optimal relationship between exergy efficiency and output acoustic power, and analysed this optimization which was accounted for the irreversible factors and heat leakage coefficient. The results showed that there was an optimal temperature oscillation value , by which we could not only get the high output acoustic power but also high exergy efficiency, and we approved this conclusion by numerical calculation.