不可逆空间太阳能动力Braysson循环的生态学优化  

Ecological Optimumization of an Irreversible Space Solar Energy Power Braysson Cycle

作　　者：何济洲[1] 周枫[2] 杨蓓[1] 

机构地区：[1]南昌大学理学院,江西南昌330031 [2]南昌大学机电工程学院,江西南昌330031

出　　处：《南昌大学学报（工科版）》2008年第1期28-31,共4页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(10465003)

摘　　要：基于生态学优化判据对一种不可逆空间太阳能Braysson循环的性能参数进行优化计算。生态学目标函数定义为火用输出率减去火用损失率,而火用损失率等于环境温度乘以循环熵产率。空间太阳能动力系统由太阳能收集器和不可逆的Braysson循环两部分组成。该Braysson循环与高温热源的换热满足牛顿传热规律,与低温热源的换热则满足热辐射换热规律。推导出包括循环的效率、输出功率、生态学函数等在内的性能参数的具体表达式,进一步在最优生态学函数的条件下,对热机的各种性能参数进行了优化分析,获得了一些有意义的结论。Based on the ecological optimum criterion the performance parameters for an irreversible space solar energy powered Braysson cycle are optimally analyzed. The ecological objective function is defined as the exergy output rate minus the exergy loss rate which is equal to the product of the environmental temperature and the entro- py production. A space solar energy power system is composed of the solar energy collector and an irreversible Braysson cycle. The heat transfer between the Braysson cycle system and the hot reservoir obeys Newton＇ s heat transfer law, and the heat transfer between the Braysson cycle system and the cold reservoir obeys the radiant heat transfer law. The detail expressions of the performance parameters including efficiency, power output and ecological function are derived. Moreover, these performance parameters of the cycle are optimized under the condition of the maximum ecological function.

关 键 词：空间太阳能动力系统 Braysson循环 牛顿传热规律 辐射换热规律 生态学优化判据 

分 类 号：TK123[动力工程及工程热物理—工程热物理]