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第 28 卷第 1 期制冷学报 Vol. 28 , No. 1
2007 年 2 月 Journal of Refrigeration February. 2007
研究论文
超临界 CO2 在管内流动换热特性的实验研究
吕静1 付萌2 秦娜2 董彬2
(1. 上海理工大学上海 200093 ; 2. 天津商学院天津 300134)
摘要以超临界二氧化碳为研究对象,对其在水平管内与水成垂直交叉流动的换热特性进行了实验研究。实验
结果表明,超临界二氧化碳在外部水垂直交叉流动冷却下的入口压力、质量流量、冷却水流量的变化都对换热性能
产生一定的影响。并且比较了两种不同冷却方式,即在逆流和垂直交叉流形式下,Re 和 Pr 数的变化规律;最后,利
用实验数据对四个考虑不同影响因素的常用经验关联式进行了验证,指出了适合实验条件的关联式。
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关键词工程热物理;超临界;关联式;二氧化碳;换热
Experimental Study on Heat Transfer Characteristics of Supercritical Carbon
Dioxide in Horizontal Tube
Lv Jing ☆, Fu Meng , Qin Na and Dong Bin
☆University of Shanghai for Science and Technology , Shanghai , 200093 , China
Abstract The heat transfer characteristics of carbon dioxide in a horizontal tube with water in the vertical cross flow form was ex
perimentally investigated. The results indicate that the changes of inlet pressure , mass flux , and cooling water flow have great ef
fects on the heat transfer performance. The variations of Reynolds number and Prandtl number were obtained in counter flow and
vertical cross flow. The four conventional correlations for convection heat transfer of supercritical CO2 were verified by the experi
mental data in this study and the correlation fit for this experimental condition was determined.
Keywords Engineering thermophysics ; Supercritical ; Correlation ; Carbon dioxide ; Heat transfer
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