Experimental Study on Oil to Water Heat Transfer Performance of Circumferential Overlap Trisection Helical Baffle Heat Exchangers

doi:10.3901/JME.2015.04.161

Journal of Mechanical Engineering ›› 2015, Vol. 51 ›› Issue (4): 161-166.doi: 10.3901/JME.2015.04.161

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Experimental Study on Oil to Water Heat Transfer Performance of Circumferential Overlap Trisection Helical Baffle Heat Exchangers

WANG Weihan¹ CHENG Daolai¹ CHEN Yaping² DONG Cong³

1. College of Urban Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 201418
2. School of Energy and Environment, Southeast University, Nanjing 210096
3. School of Mechanical and Automotive Engineering, Zhejiang University of Science and Technology, Hangzhou 310023

Online:2015-02-20 Published:2015-02-20

Abstract

Abstract: Experimental study on heat transfer performance of circumferential overlap trisection helical baffle heat exchangers of tilt angles 12°, 16°, 20°, 24°and 28° compared with a segmental baffle heat exchanger are conducted. The testing heat exchangers are constructed of a common cylinder case and replaceable tube bundle cores. The hot fluid is heat transfer oil with about 70 ℃ in the shell side and the cold fluid is cooling water with about 11 ℃ in the tube side. The results show that within the testing range, the overall heat transfer coefficient, the shell side heat transfer coefficient, pressure drop as well as comprehensive indexes ho/Δpo and ho/Δpo1/3 decrease with the increase of the tilt angle of the baffles, and the optimum scheme is the one with baffle tilt angle of 12°, and the ratios of the mean values of the shell side heat transfer coefficient ho, comprehensive index ho/Δpo and ho/Δpo1/3 of the helical scheme with baffle tilt angle of 12° over those of the segmental baffle scheme are 1.253, 1.391 and 1.285, respectively.

Key words: circumferential overlap, helical baffle heat exchanger, performance test, tilt angle, trisection helical baffle

CLC Number:

TK124

WANG Weihan, CHENG Daolai, CHEN Yaping, DONG Cong. Experimental Study on Oil to Water Heat Transfer Performance of Circumferential Overlap Trisection Helical Baffle Heat Exchangers[J]. Journal of Mechanical Engineering, 2015, 51(4): 161-166.

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Experimental Study on Oil to Water Heat Transfer Performance of Circumferential Overlap Trisection Helical Baffle Heat Exchangers

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