摘要
研究了CuO-R113纳米制冷剂在水平直光管内的流动沸腾换热特性。实验测试段长度1.5 m、外径9.52 mm。实验工况的质量流率为100～200 kg·m^(-2)·s^(-1),热通量为3.08～6.16 kW·m^(-2),入口干度为0.2～0.7,纳米颗粒质量分数为0～0.5%。结果表明:CuO-R113纳米制冷剂的传热系数高于纯R113制冷剂的传热系数。纳米颗粒的加入,强化了制冷剂管内流动沸腾换热。质量流率为100、150、200 kg·m^(-2)·s^(-1)的情况下,传热系数分别最大提高了29.7%、22.7%、25.6%。
Experimental study on heat transfer characteristics of nanorefrigerant CuO-R113 flow boiling inside a horizontal smooth tube with totallength 1.5m and outside diameter 9.52mm was performed.The test conditions were as follows;the mass flux is from 100 to 200 kg·m^(-2)·s^(-1),the heat flux is from 3.08 to 6.1 6 kW·m^(-2),the inlet vapor quality is from 0.2 to 0.7,the mass fraction of nanoparticles is from 0 to 0.5%.The experimental results showed that the heat transfer coefficient of nanorefrigerant CuO- R113 is larger than that of pure refrigerant R1 1 3.the flow boiling heat transfer is enhanced by adding nanoparticles.When mass flux is 100 kg·m^(-2)·s^(-1),heat transfer coefficient increases 29.7%maximally. When mass flux is 150 kg·m^(-2)·s^(-1),heat transfer coefficient increases 22.7%maximally.When mass flux is 200 kg·m^(-2)·s^(-1),heat transfer coefficient increases 25.6%maximally.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2008年第S2期70-75,共6页
CIESC Journal
基金
教育部新世纪人才计划(NCET-05-0403)~~
关键词
纳米制冷剂
光管
流动沸腾
换热
nanorefrigerant
smooth tube
flow boiling
heat transfer
