Entransy Dissipation Analyses of Series-wound and Parallel Thermal Networks
This paper uses the entransy theory to optimize the heat transfer processes in thermal networks which widely exist in engineering, such as the thermal control systems of spacescraft and the water chillers in air conditioning. For the series-wound and parallel thermal networks, there are some heat transfer optimization problems, such as the distribution optimization of the heat transfer area or heat load. In addition, the distribution of the flow rate of cold fluid in parallel thermal network should also be optimized. For these problems, physical and mathematical models are set up and analyzed with the entransy theory. It is found that the optimization objectives of these problems and the optimization directions of the extremum entransy dissipation principle are consistent in theory. Moreover, for the distribution optimization problem of the given heat load, it is found that the optimized results and those of the uniformity principle of temperature difference field are consistent. For some simple thermal networks, the distributions of the heat transfer area or heat load are optimized by calculating the extremum entransy dissipation with the Newton method.
entransy entransy dissipation thermal network heat transfer optimization Newton method
Xuetao CHENG Xingang LIANG
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
国际会议
4th International Symposium on Heat Transfer and Energy Conservation(第四届传热与节能国际研讨会 ISHTEC2012)
广州
英文
1-7
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）