|Table of Contents|

Experimental study on boiling heat transfer of R134a in offset strip fins

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2014年03期
Page:
419-
Research Field:
Publishing date:

Info

Title:
Experimental study on boiling heat transfer of R134a in offset strip fins
Author(s):
Zheng WenyuanWu Jingze
Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration, Aviation Industry Corporation of China,Nanjing 211106,China
Keywords:
R134aoffset strip finsboiling heat transfermass flow ratesBertsch correlationplatefin evaporatorssurface temperatureconvective heat transfer coefficientsstraight channelscooling capacities
PACS:
TK124
DOI:
-
Abstract:
In order to design platefin evaporators,the boiling heat transfer coefficients of R134a in offset strip fins are studied experimentally under different mass flow rates.A modified formula of the boiling heat transfer coefficient of Bertsch correlation is obtained by comparing the calculation data of Berstch correlation with the experimental data,and it is verified by experiments of a platefin evaporator with the same structure.The experimental results show that the surface temperature of offset strip fins along the flow direction has the same changing trend under different entrance conditions,which almost has no change in the beginning but increase significantly at 290 mm position;under the same mass flow rates,the convective heat transfer coefficients of R134a in offset strip channels are much larger than those in straight channels;the deviations of cooling capacities calculated by the boiling heat transfer coefficient modified formula of Berstch correlation from experimental results are about 10%.

References:

[1]李运祥,潘泉,刘志丽,等.机载蒸发循环制冷系统动态仿真[J].南京理工大学学报,2013,37(1):127-132.
Li Yunxiang,Pan Quan,Liu Zhili,et al.Dynamic numerical investigations of onboard vaporcompression refrigeration system[J].Journal of Nanjing University of Science and Technology,2013,37(1):127-132.
[2]黄钰期,俞小莉,陆国栋.锯齿型翅片单元的流动与传热数值模拟[J].浙江大学学报(工学版),2008,42(8):1462-1468.
Huang Yuqi,Yu Xiaoli,Lu Guodong.Numerical simulation of slit fin cell’s flow and heat transfer[J].Journal of Zhejiang University(Engineering Science),2008,42(8):1462-1468.
[3]Yoo S Y,Kim J H,Jie M S.A study on energy saving of cooling/reheating system using compact heat exchanger[J].Journal of Mechanical Science and Technology,2010,24(4):887-892.
[4]陈变蕊,侯予,刘秀芳,等.板翅式蒸发器液冷系统的实验研究[J].制冷学报,2008,29(2):8-13.
Chen Bianrui,Hou Yu,Liu Xiufang,et al.Experimental study on refrigerating system with platefin evaporator[J].Journal of Refrigeration,2008,29(2):8-13.
[5]Manglik R M,Bergles A E.Heat transfer and pressure drop correlations for the rectangular offset strip fin compact heat exchanger[J].Experimental Thermal and Fluid Science,1995,10(2):171-180.
[6]Bhowmik H,Lee K S.Analysis of heat transfer and pressure drop characteristics in an offset strip fin heat exchanger[J].International Communications in Heat and Mass Transfer,2009,36(3):259-263.
[7]魏进家,刘海燕,龙延.板翅式换热器流动和换热性能研究[J].工程热物理学报,2012,33(10):1785-1788.
Wei Jinjia,Liu Haiyan,Long Yan.Study of flow and heat transfer performance of platefin heat exchanger[J].Journal of Engineering Thermophysics,2012,33(10):1785-1788.
[8]王勋,王文,耑锐.R134a制冷剂在微通道中的相变传热特性实验[J].低温工程,2009(2):10-14.
Wang Xun,Wang Wen,Zhuan Rui.Experiment of condensation and heat transfer for R134a refrigerant in microchannel heat exchanger[J].Cryogenics,2009(2):10-14.
[9]邵莉,刘利民,苑伟,等.R134a卧式螺旋管内沸腾两相流型与传热特性实验研究[J].原子能科学技术,2013,47(3):391-396.
Shao Li,Liu Limin,Yuan Wei,et al.Study on twophase patterns and heat transfer of R134a in horizontal helicallycoiled pipe[J].Atomic Energy Science and Technology,2013,47(3):391-396.
[10]Chen J C.Correlation for boiling heat transfer to saturated fluid in convective flow[J].Industrial and Engineering Chemistry Process Design and Development,1966,5(3):322-329.
[11]Cooper M G.Heat flow rates in saturated nucleate pool boiling—a wideranging examination using reduced properties[J].Advances in Heat Transfer,1984,16:157-239.
[12]Bertsch S S,Groll E A,Garimella S V.A composite heat transfer correlation for saturated flow boiling in small channels[J].International Journal of Heat and Mass Transfer,2009,52(7-8):2110-2118.

Memo

Memo:
-
Last Update: 2014-06-30