回热式布雷顿两平行逆布雷顿联合循环第一定律分析与优化

摘要

A combined regenerative Brayton and inverse Brayton cycles is proposed .The first law analysis and optimization for the com-bined cycle is performed .Analytical formulae about optimal thermal efficiency and optimal specific work are deduced .Moreover , the effects of regenerator and other parameters on the performance of the combined cycle are analyzed .It is found that the combined regen-erative cycle can obtain higher thermal efficiency than that of the base cycle but smaller work output .%提出了回热式布雷顿两平行逆布雷顿联合循环模型。对该模型进行了第一定律性能分析与优化，得出了该循环最优效率和最优比功的表达式，分析了回热度及其他参数对联合循环最优热效率和最优比功的影响。分析表明，增加回热器后能提高联合循环的热效率，但此时联合循环的输出比功较小。