回热式布雷顿制冷循环的性能优化

Optimization on Performance of Regenerative Brayton Refrigeration Cycle

基于回热式不可逆布雷顿制冷循环模型,导出循环的制冷率、性能系数和输入功率等一些重要性能参数的一般表达式及制冷率和性能系数之间优化关系所满足的方程,研究回热和各种不可逆性对其优化性能的影响,讨论了循环的优化运行区间及其性能界限,确定了最佳传热面积。通过数值计算分析了设计参数对循环的制冷率、性能系数和输入功率的影响。

Based on an irreversible model of a regenerative Brayton refrigeration cycle, expressions for several important performance parameters such as the cooling load, coefficient of performance, and power input, and the optimal relation between the cooling rate and the coefficient of performance were derived. The influence of regeneration and several irreversiblities on the optimal performance of the cycle was investigated. The optimal operating region and the performance bounds of the cycle were discussed. The optimal heat- transfer areas were determined. The influences of the design parameters on the cooling load, coefficient of performance, and power input of the cycle were studied with numerical calculation.