加热工况下圆管内超临界二氧化碳传热关系式分析评价

Evaluation of Heat Transfer Correlations for Supercritical Carbon Dioxide in Circular Tubes under Heating Conditions

对已有的加热工况下圆管内超临界二氧化碳传热关系式进行分类整理,并基于公开文献报道的实验数据对已有关系式进行评价。从已公开发表的文献可见,现有关系式多是参考经典的单相传热关系式并加入修正项,各关系式在拟临界区域预测结果与实验数据偏差较大,Jackson关系式和Krasnoshcheko关系式预测结果与实验数据吻合相对较好。

This paper presents a review of heat transfer correlations for supercritical carbon dioxide in circular tube under heating conditions. All of these reviewed correlations were preliminarily evaluated based on experimental data in open literature. The results showed that most of these heat transfer correlations have the general form of classical single phase heat transfer correlations with some modifications. Among these correlations, Jackson correlation and Krasnoshcheko correlation agreed well with experimental data, however, poor agreement was found for all of the reviewed correlations in near-critical region.