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Pool boiling performance of porous surface tubes under vacuum conditions 被引量:1
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作者 王学生 代晶晶 +1 位作者 从建立 陈琴珠 《Journal of Southeast University(English Edition)》 EI CAS 2010年第2期339-342,共4页
Two types of tube bundles are designed,which are,respectively,composed of six tubes arranged in the boiling chamber.The nucleate pool boiling performance of smooth tube bundles and sintered porous surface tube bundles... Two types of tube bundles are designed,which are,respectively,composed of six tubes arranged in the boiling chamber.The nucleate pool boiling performance of smooth tube bundles and sintered porous surface tube bundles with deionized water as a medium are experimentally studied at atmospheric and sub-atmospheric pressures,respectively.The experimental results indicate that the boiling heat transfer coefficients of the two types of tube bundles increase with the increase in pressure under vacuum conditions as they behave under ordinary pressure.As the pressure varies from 10 to 100 kPa,it also can be seen that the heat transfer coefficient of the sintered porous surface tube is increased by 0.2 to 4 times compared with the smooth one under the same operating parameters.In addition,the experimental data show that a definite bundle effect exists in both sintered porous surface tubes and smooth tubes under vacuum conditions. 展开更多
关键词 pool boiling porous surface tube heat transfer enhancement
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Heat Transfer of Boiling R134a and R142b on a Twisted Tube with Machine Processed Porous Surface 被引量:1
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作者 高学农 尹辉斌 +3 位作者 黄玉优 凌双梅 张正国 方玉堂 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第3期492-496,共5页
The objective of this work was to investigate nucleate pool boiling heat transfer performance and mechanism of R134a and R142b on a twisted tube with machine processed porous surface (T-MPPS tube) as well as to dete... The objective of this work was to investigate nucleate pool boiling heat transfer performance and mechanism of R134a and R142b on a twisted tube with machine processed porous surface (T-MPPS tube) as well as to determine its potential application to flooded refrigerant evaporators. In the experimental range, the boiling heat transfer coefficients of R134a on a T-MPPS tube were 1.8-2.0 times larger than those of R134a on a plain tube. In addition, the developed experimental correlations verified that the predictions of the heat transfer coefficients of boiling R134a and R142bon a T-MPPS tube at the experimental conditions were considerably accurate. 展开更多
关键词 nucleate pool boiling heat transfer enhancement twisted tube with machine processed porous surface
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