A comparative analysis of efficiency at maximum power output for heat engines
In this work,we present a comparative analysis of the efficiencies at maximum power output for different devices; first,we analyze the expressions of the efficiency at maximum power for two models of heat engines: a model of Curzon-Ahlborn(macroscopic)and a Novikov model,in these two cases,two kinds of heat transfer laws were considered; first,a heat transfer due to free convection described by Newtons Law of cooling and,second,a phenomenologic heat transfer comes from linear irreversible thermodynamics.On the other hand,we present the efficiencies at maximum power for stochastic(mesoscopic)heat engines obtained by Schmiedl and Seifert(2008),and for a Ratchet device,we also compared these efficiencies with the results presented recently by Esposito et al.(2010).For comparing,we expanding the expressions of efficiencies up to the third-order in term of C h,where C h is the efficiency of Carnot.We found some interesting similarities for the expressions of efficiencies between the macroscopic and mesoscopic models of heat engines.
Efficiency Maximum Power Thermal Heat Engine Irreversible Thermodynamics Mesoscopic engines
R.E.González-Narváez N.Sánchez-Salas M.A.Barranco-Jiménez A.Calvo Hernández
Escuela Superior de Física y Matemáticas del IPN,México DF,México Escuela Superior de Cómputo del IPN,México DF,México Departamento de Física Aplicada,Universidad de Salamanca,37008 Salamanca
国际会议
桂林
英文
1-11
2013-07-16（万方平台首次上网日期，不代表论文的发表时间）