Effect of heat transfer on the performance of thermal Brownian heat pump

被引：0
|
作者：
Qi C. [1 ,2 ,3 ]
Chen L. [1 ,2 ,3 ]
Xie S. [1 ,2 ,3 ]
Ge Y. [1 ,2 ,3 ]
Feng H. [1 ,2 ,3 ]
机构：
[1] Institute of Thermal Science and Power Engineering, Wuhan Institute of Technology, Wuhan
[2] Hubei Provincial Engineering Technology Research Center of Green Chemical Equipment, Wuhan
[3] School of Mechanical & Electrical Engineering, Wuhan Institute of Technology, Wuhan
来源：
Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica | 2023年 / 53卷 / 03期
关键词：
COP; finite-time thermodynamics; heating load; Newton’s heat transfer law; performance optimization; thermal Brownian heat pump;
D O I：
10.1360/SST-2022-0083
中图分类号：
学科分类号：
摘要：
A finite-time thermodynamic model of the thermal Brownian heat pump is established in this paper. The heat transfer between a reservoir and viscous medium is assumed to obey Newton’s law. The expressions for the heating load and coefficient of performance (COP) are derived. The effects of heat transfer on thermal Brownian heat pump performance are analyzed, and the valid working region of a thermal Brownian heat pump is obtained. The performance characteristics of the Brownian heat pump are compared with those of the macro endoreversible Carnot heat pump. For a fixed total heat-exchanger inventory, the distribution of heat-exchanger inventory is optimized for maximizing the heating load. The results indicate that the new model with thermal resistance delivers less heating load than the nonequilibrium thermodynamic model, and the new performance characteristics are closer to reality. The system performance can be improved by enhancing the heat transfer between the reservoir and the heat pump. An optimal heat-exchanger inventory ratio exists for maximizing the heating load, and the COP is irrelevant to the heat-exchanger inventory. When the total heat-exchanger inventory is infinite, the model becomes a nonequilibrium thermodynamic one. The heating load can be improved by reducing the reservoir temperature difference, and the COP is not affected by the reservoir temperatures. © 2023 Chinese Academy of Sciences. All rights reserved.
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页码：385 / 394
页数：9
相关论文
共 64 条
  • [1] Hanggi P, Marchesoni F., Artificial Brownian motors: Controlling transport on the nanoscale, Rev Mod Phys, 81, pp. 387-442, (2009)
  • [2] Feynman R P, Leighton R B, Sands M., The Feynman Lectures on Physics, I, (1963)
  • [3] Astumian R D, Hanggi P., Brownian motors, Phys Today, 55, pp. 33-39, (2002)
  • [4] Astumian R D., Thermodynamics and kinetics of a Brownian motor, Science, 276, pp. 917-922, (1997)
  • [5] Ding Z M, Chen L G, Wang W H, Et al., Progress in study on finite time thermodynamic performance optimization for three kinds of microscopic energy conversion systems, Sci Sin Tech, 45, pp. 889-918, (2015)
  • [6] Derenyi I, Bier M, Astumian R D., Generalized efficiency and its application to microscopic engines, Phys Rev Lett, 83, pp. 903-906, (1999)
  • [7] Ai B Q, Xie H Z, Wen D H, Et al., Heat flow and efficiency in a microscopic engine, Eur Phys J B, 48, pp. 101-106, (2005)
  • [8] Zhang Y, Lin B H, Chen J C., Performance characteristics of an irreversible thermally driven Brownian microscopic heat engine, Eur Phys J B, 53, pp. 481-485, (2006)
  • [9] Ding Z M, Chen L G, Sun F R., Power and efficiency performances of a micro thermal Brownian heat engine with and without external forces, Braz J Phys, 40, pp. 141-149, (2010)
  • [10] Cheng H T, He J Z, Xiao Y L., Brownian heat engine driven by temperature difference in a periodic double-barrier sawtooth potential, Acta Phys Sin, 61, (2012)
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