摘要
火积耗散原理为评价、优化换热器性能开辟了新的途径。为了使火积耗散均匀分布原则和温差均匀分布原则更好的应用于实际换热过程,采用编程迭代的方法,采用某两种优化原则进行改进,基于改进后的两种优化原则,分析比较了二氧化碳在不同进口压力时,两种原则优化的效果。结果表明,从有效度、火积耗散数等沿换热方向的大小变化,显示火积耗散均匀分布原则优化结果明显优于温差均匀分布原则,表明火积耗散均匀分布原则的传热效率高于温差均匀分布原则。
A new way for evaluating and optimizing the performance of the heat exchanger had opened up by the dissipation Entransy. The pritwiple of equipartition of entransy dissipation and temperature difference were improved by the method of programming iteration, which could be combined with practical application better. Based on the two improved principles, the optimization effect were analyzed and compared in view of the carbon dioxide at different inlet pressure. The results showed that the principle of equipartition of entransy dissipation was better than the principles of equipartition of temperature difference from availability and entransy dissipation number, so the heat transfer efficiency was also better.
出处
《机械设计与制造》
北大核心
2013年第10期84-86,共3页
Machinery Design & Manufacture
基金
国家自然科学基金(51076145)
关键词
超临界二氧化碳
火积耗散均匀分布原则
温差均匀分布原则
Supercritical CO2
Principle of Eqnipartition of Entransy Dissipation
Principle of Equipartition Temperature Difference
