Analyses of an air conditioning system with entropy generation minimization and entransy theory

作者：Wu, Yan-Qiu^*; Cai, Li; Wu, Hong-Juan

来源：Chinese Physics B, 2016, 25(6): 060507.

DOI：10.1088/1674-1056/25/6/060507

• entropy generation
• entransy increase
• entransy dissipation
• optimization analyses
• finite time thermodynamics
• air conditioning system

In this paper, based on the generalized heat transfer law, an air conditioning system is analyzed with the entropy generation minimization and the entransy theory. Taking the coefficient of performance (denoted as COP) and heat flow rate Q(out) which is released into the room as the optimization objectives, we discuss the applicabilities of the entropy generation minimization and entransy theory to the optimizations. Five numerical cases are presented. Combining the numerical results and theoretical analyses, we can conclude that the optimization applicabilities of the two theories are conditional. If Qout is the optimization objective, larger entransy increase rate always leads to larger Qout, while smaller entropy generation rate does not. If we take COP as the optimization objective, neither the entropy generation minimization nor the concept of entransy increase is always applicable. Furthermore, we find that the concept of entransy dissipation is not applicable for the discussed cases.

• 出版日期2016-6
• 单位重庆三峡学院