[1] Wang XueshengDai JingjingCong JianliChen Qinzhu,. Pool boiling performance of porous surface tubesunder vacuum conditions [J]. Journal of Southeast University (English Edition), 2010, 26 (2): 339-342. [doi:10.3969/j.issn.1003-7985.2010.02.043]
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Pool boiling performance of porous surface tubesunder vacuum conditions(
)
真空条件下表面多孔管的池沸腾传热性能
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 26
- Issue:
- 2010 2
- Page:
- 339-342
- Research Field:
- Energy and Power Engineering
- Publishing date:
- 2010-06-30
Info
- Title:
- Pool boiling performance of porous surface tubesunder vacuum conditions
- 真空条件下表面多孔管的池沸腾传热性能
- Author(s):
- Wang XueshengDai JingjingCong JianliChen Qinzhu
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
- Keywords:
- pool boiling; porous surface tube; heat transfer enhancement
- PACS:
- TK172
- DOI:
- 10.3969/j.issn.1003-7985.2010.02.043
- Abstract:
- 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.
- 设计了2种分别由6根管子组成的不同管束排列在沸腾室中.实验以去离子水为介质, 研究了常压及低于大气压下压力对光滑管束和烧结表面多孔管束核池沸腾传热性能的影响.实验结果表明, 在真空条件下这2种管束的沸腾传热系数与在常压条件下一样随着压力值的升高而增大.在相同的操作参数条件下, 与光滑管相比较, 当压力值在10~100 kPa之间变化时, 烧结表面多孔管的传热系数提高了0.2~4倍.此外, 实验数据还表明在真空条件下烧结表面多孔管及光滑管均存在管束效应.
References:
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[4] Liu Along, Xu Hong, Wang Xuesheng, et al.Boiling heat transfer on composite power porous surface tubes[J].Journal of Chemical Industry and Engineering, 2006, 57(4): 726-730.(in Chinese)
[5] Marto P J, Lepere V J.Pool boiling heat transfer from enhanced surfaces to dielectric fluids[J].Journal of Heat Transfer, 1982, 104(2): 292-299.
[6] Cong Jianli.Research on heat transfer enhancement of adsorbent bed and evaporator in adsorption refrigeration[D].Shanghai: School of Mechanical and Power Engineering of East China University of Science and Technology, 2009.(in Chinese)
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[8] Yang Shaohua, Gao Xuenong, Wang Shiping, et al.Experimental study on nucleate pool boiling heat transfer of R142b outside horizontal tube bundle[J].Journal of Refrigeration, 1999(3): 1-4.(in Chinese)
Memo
- Memo:
-
Biography: Wang Xuesheng(1965—), male, doctor, professor, wangxs@ecust.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.50706012).
Citation: Wang Xuesheng, Dai Jingjing, Cong Jianli, et al.Pool boiling performance of porous surface tubes under vacuum conditions[J].Journal of Southeast University(English Edition), 2010, 26(2):339-342.