SUPERCRITICAL HEAT TRANSFER CHARACTERISTICS IN VERTICALLY UPWARD FLOW

被引：0
|
作者：
He, Jiacheng [1 ]
Dang, Chaobin [1 ]
Hihara, Eiji [1 ]
机构：
[1] Univ Tokyo, Grad Sch Frontier Sci, Dept Human & Engn Environmnental Studies, Kashiwa, Chiba 2778563, Japan
来源：
5TH IIR INTERNATIONAL CONFERENCE ON THERMOPHYSICAL PROPERTIES AND TRANSFER PROCESSES OF REFRIGERANTS (TPTPR) | 2017年
基金：
日本科学技术振兴机构;
关键词：
Superctitical Heat Transfer; Vertical Tube; Upward Flow; R245fa; ORC; CARBON-DIOXIDE; WATER;
D O I：
暂无
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The characteristics of supercritical heat transfer of refrigerant R245fa in heating condition were investigated experimentally in a vertical bare tube with a diameter of 4 mm and a length of 840 mm at an constant pressure of 4 MPa, the local heat transfer coefficient for heat flux ranging from 20 to 100 kW/m(2) and mass flux stabilizing at 400 kg/m(2)s. By changing the inlet temperature of test section, the refrigerant state changed to across pseudo-critical point. The experiment data were also compared with existing empirical correlations.
引用
收藏
页码：1223 / 1229
页数：7
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