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中文摘要：
提出了后回热式布雷顿一两平行逆布雷顿联合循环模型。对该联合循环进行了能量分析，导出了联合循环热效率和比功的表达式，以热效率和比功为目标对该联合循环的性能进行了优化，分析了回热器有效度和其他参数对最优热效率和最优比功的影响。分析表明，以热效率为优化目标时，该联合循环的最优热效率随着回热度的增加而增加，其相应比功随着回热度的增加而减小；以比功为优化目标时，回热度对该联合循环的最优比功的影响很小，其相应热效率随着回热度的增加而增加。
英文摘要：
A combined regenerative Brayton and two parallel inverse Brayton cycles with regeneration after the inverse cycles was proposed in this paper. The energy analysis was carried out for this combined cycle, and the analytical formulae about thermal efficiency and specific work of the combined cycle were deduced. The performance of the combined cycle was optimized by taking thermal efficiency and specific work as objectives. Moreover, the effects of changes of the effectiveness of regenerator and other parameters on the performance of the combined cycle were analyzed. It is found that when take thermal efficiency as the objective, the optimal thermal efficiency increases with the increase in the effectiveness of regenerator while the corresponding specific work decreases; when take specific work as the objective, the effectiveness of regenerator has little influence on the optimal specific work while the corresponding thermal efficiency increases with the increase in the effectiveness of regenerator.
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