Thermodynamic characteristics of a Brownian heat pump in a spatially periodic temperature field

作     者：DING ZeMin,CHEN LinGen & SUN FengRui Postgraduate School,Naval University of Engineering,Wuhan 430033,China 

作者机构：Postgraduate School Naval University of Engineering Wuhan China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2010年第53卷第5期

页      面：876-885页

核心收录：

学科分类：07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：supported by the Program for New Century Excellent Talents in University of China (Grant No. NCET-04-1006) the Foundation for the Author of National Excellent Doctoral Dissertation of China (Grant No. 200136) 

主　　题：Brownian heat pump COP heating load heat flow performance characteristics finite time thermodynamics 

摘      要：This paper has studied the thermodynamic performance of a thermal Brownian heat pump,which consists of Brownian particles moving at a periodic sawtooth potential with external forces and contacting with the alternating hot and cold reservoirs along the space *** heat flows driven by both potential and kinetic energies are taken into *** analytical expressions for the heating load,coefficient of performance(COP) and power input of the Brownian heat pump are derived and the performance characteristics are obtained by numerical *** is shown that due to the heat flow via the change of kinetic energy of the particles,the Brownian heat pump is always irreversible and the COP can never attain the Carnot *** study has also investigated the influences of the operating parameters,*** external force,barrier height of the potential,asymmetry of the sawtooth potential and temperature ratio of the heat reservoirs,on the performance of the Brownian heat *** effective regions of external force and barrier height of the potential in which the Brownian motor can operates as a heat pump are *** results show that the performance of the Brownian heat pump greatly depends on the parameters;if the parameters are properly chosen,the Brownian heat pump may be controlled to operate in the optimal regimes.