期刊名称：International Journal of Energy and Environment
印刷版ISSN：2076-2895
电子版ISSN：2076-2909
出版年度：2011
卷号：2
期号：4
页码：723-738
出版社：International Energy and Environment Foundation (IEEF)
摘要：The generalized radiative heat transfer law is introduced into a model external combustion engine with a movable piston, and effects of heat transfer laws on the optimizations of the engine for maximum work output are investigated in this paper. Numerical examples for the optimizations with linear phenomenological (n=-1), Newton’s (n=1), square (n=2), cubic (n=3) and radiative (n=4) heat transfer laws are provided, respectively, and the obtained results are compared with each other. The results show that work output and efficiency of the optimal fully cyclic operation and optimal semi-cyclic operation decrease with the increase of heat conductance, and the work output, compression ratio and efficiency of the optimal semi-cyclic operation are larger than those of optimal fully cyclic operation. Although all of the curves of volume versus time of the optimal fully cyclic operation and the Euler-Lagrange (E-L) arcs of the optimal semi-cyclic operation are nearly sinusoidal and consist of three stages with the five heat transfer laws, the curves with different heat transfer laws are different.
