摘要
利用实验方法研究在各种加热温度和各种充液量下氧化石墨烯对重力热管传热性能的影响。通过选择蒸馏水和不同质量分数的氧化石墨烯纳米流体为热管工质,测量充液率35%、50%、60%、70%和质量分数0.5%、1%、2%条件下的重力热管管壁温度,通过相应公式比较测试蒸发段和冷凝段的传热系数。实验结果显示:在质量分数0.5%—1%区间内,质量分数越高,重力热管传热系数越大;在质量分数1%—2%时,随着质量分数的提高,重力热管传热系数降低。采用充液率为60%、质量分数为1%的纳米流体重力热管传热系数效果最好,相比于基液热管蒸发段和冷凝段传热系数分别提高了60%和40%;氧化石墨烯提高热管传热性能的原因主要是其热导率较高且表面润湿性较好。
The effect of graphene oxide(GO) on the heat transfer performance of gravity heat pipe at various heating temperatures and liquid filling quantities was studied by experimental method. By selecting distilled water and graphene oxide nanofluids with different mass fractions as heat pipe working medium, the wall temperature of gravity heat pipe under the conditions of 35%, 50%, 60%, 70% liquid filling rate and 0.5%, 1% and 2% mass fraction was measured, and the heat transfer coefficients of evaporation section and condensation section were compared and tested by corresponding formulas. The experimental results show that the higher the mass fraction in the range of 0.5%—1%, the greater the heat transfer coefficient of gravity heat pipe. When the mass fraction is 1%—2%, the heat transfer coefficient of gravity heat pipe decreases with the increase of mass fraction. The heat transfer coefficient of nano fluid gravity heat pipe with liquid filling rate of 60% and mass fraction of 1% is the best. Compared with the base liquid heat pipe, the heat transfer coefficient of evaporation section and condensation section is increased by 60% and 40% respectively. The main reasons why graphene oxide improves the heat transfer performance are its higher thermal conductivity and better surface wettability.
作者
金志浩
陈玉润
韩振南
JIN Zhi-hao;CHEN Yu-run;HAN Zhen-nan(School of Mechanical and Power Engineering;Institute of Energy and Chemical Industry Technology,Shenyang University of Chemical Technology,Shenyang 110142,Liaoning Province,China)
出处
《化学工程》
CAS
CSCD
北大核心
2022年第12期38-41,71,共5页
Chemical Engineering(China)
基金
国家自然科学基金委新疆联合基金资助项目(U190310)。
关键词
氧化石墨烯
重力热管
纳米流体
传热系数
graphene oxide
gravity heat pipe
nanofluids
heat transfer coefficient
