一类不可逆热机的热经济学优化性能

THERMOECONOMIC OPTIMIZATION ON THE PERFORMANCE OF A CLASS OF IRREVERSIBLE HEAT ENGINES

基于一类不可逆热机的一般循环模型,以每单位成本的功率输出作为热经济学目标函数,研究投资成本、燃料成本、其它费用成本和几种主要不可逆性对热机性能的影响。导出热机效率和热经济学目标函数间的基本优化关系。由此计算了最大热经济学目标函数及其对应的热机性能参数,给出了在不同传热规律下热机的基本优化关系。确定了热机的最佳工作区域和重要性能参数的界限。

On the basis of a general cycle model of a class of heat engines, the power output per unit cost is taken as a thermoecnomic objective function and used to investigate the influence of investment cost, fuel cost, other charge cost, and several main irreversibilities on the performance of the cycle. The fundamental optimal relation between the efficiency and the thermoeconomic objective function is derived. The maximum objective function and the corresponding performance parameters are calculated. The optimal relations for the different heat transfer laws are given. The optimally operating regions of heat engines and the bounds of some important performance parameters are determined.