Experimental Research on the Flow Friction and Heat Transfer Performance in Titanium Alloy Twisted Tube[J]. 2018, 52(1): 14-19+25.
DOI:
Experimental Research on the Flow Friction and Heat Transfer Performance in Titanium Alloy Twisted Tube[J]. 2018, 52(1): 14-19+25.DOI: 10.7652/xjtuxb201801003.
Experimental Research on the Flow Friction and Heat Transfer Performance in Titanium Alloy Twisted Tube
To study the heat transfer performance at the shell side of the titanium alloy spiral twisted tube heat exchanger with high viscosity heat transfer oil
experimental research was conducted on the laminar flow(Re<2 000)and transition flow(2 000<Re<9 000)and heat transfer in the titanium alloy twisted tube. A comparison with segmental baffle heat exchanger using ordinary tube and transversally corrugated tube as heat transfer components was carried out. The correlation equations with the Nusselt number and the resistance coefficient of shell side were given according to the results of experiments with a maximum deviation of ±10%. Experimental results indicate that the shell side of the titanium alloy twisted tube heat exchanger shows good performance of heat transfer enhancement
the heat transfer enhancement index h/Δp is 1.7-2.5 times of spiral tube heat exchanger and 2.3-4 times of ordinary tube heat exchanger. In laminar flow and transition flow
Re
Pr and the size of twisted tube have great influences on heat transfer. It shows that the titanium alloy twisted tube heat exchanger is especially suitable for heat transfer of laminar flow.
YANG Li, LI Zhixin. Numerical simulation of laminar flow and heat transfer in twisted elliptic tube [J]. Engineering Mechanics, 2003, 20(5): 144-148.
RAINIERI S, PAGLIARINI G. Convective heat transfer to temperature dependent property fluids in the entry region of corrugated tubes [J]. International Journal of Heat and Mass Transfer, 2002, 45(22): 4525-4536.
SARMA P K, SUBRAHMANYAM T, KISHORE P S, et al. Laminar convective heat transfer with twisted tape inserts in a tube [J]. International Journal of Thermal Sciences, 2003, 42(9): 821-828.
DONG Q W, WANG Y Q, LIU M S. Numerical and experimental investigation of shellside characteristics for RODbaffle heat exchanger [J]. Applied Thermal Engineering, 2008, 28(7): 651-660.
GAO Xuenong, ZOU Chunhua, WANG Duanyang, et al. Heat transfer and flow resistance properties in twisted oblate tube with large twist ratio [J]. Journal of South China University of Technology(Natural Science Edition), 2008, 36(11): 18-26.
GAO B, BI Q C, NIE Z S, et al. Experimental study of effects of baffle helix angle on shell-side performance of shell-and-tube heat exchangers with discontinuous helical baffles [J]. Experimental Thermal and Fluid Science, 2015, 68: 48-57.
ZACHAR A. Analysis of coiled-tube heat exchangers to improve heat transfer rate with spirally corrugated wall [J]. International Journal of Heat and Mass Transfer, 2010, 53(20): 3928-3939.
ROUSSEAU P G, VAN ELDIK M, GREYVENSTEIN G P, et al. Detailed simulation of fluted tube water heating condensers [J]. International Journal of Refrigeration, 2003, 26(2): 232-239.
DZYUBENKO B V, ASHMANTAS L A, DREITSER G A, et al. Unsteady-state heat transfer and mixing of a heat carrier in a heat exchanger with flow twisting [J]. International Journal of Heat and Mass Transfer, 1985, 28(4): 867-877.
VILEMAS Y V, DZYUBENKO B V, SAKALAUSKAS A B. Investigation of flow structure in heat exchanger with helically twisted tubes [J]. Power Engineering, 1980, 18(4): 116-123.
DZYUBENKO B V. Influence of flow twisting on convective heat transfer in banks of twisted tubes [J]. Heat Transfer Research, 2005, 36(6): 449-459.
MUSHABBAB A. Design and operate a fouling monitoring device to study fouling at twisted tube [D]. Dhahran, Kingdom of Saudi Arabia: King Fahd University of Petroleum Minerals, 2007: 96-135.
AL-HADHRAM L M, AHMAD A, AL-QAHTANI A. Performance analysis of heat exchangers of an existing naphtha hydrotreating plant: a case study [J]. Applied Thermal Engineering, 2010, 30(8): 1029-1033.
ZHANG Yinxiao, LI Kequn, WU Hui, et al. Numerical simulation on heat transfer and pressure study in spiral oval twisted tube [J]. Energy Technology, 2010, 31(6): 315-321.
PAN Caimei, WANG Wenhao, CUI Xiaoyu. Numerical simulation of shell-side heat transfer in the spiral elliptical-tube heat exchanger [J]. Energy Research and Information, 2011, 27(2): 99-104.
YANG Liu, ZHU Dongsheng, LI Xia, et al. Numerical simulation of shell side heat transfer and pressure drop characteristics of twisted tube heat exchanger [J]. Chemical Engineering, 2014, 42(4): 32-36.
MENG Jian, LI Zhixin, GUO Zengyuan. Simulation and analysis on laminar flow and heat transfer in twisted ellipse-tube [J]. Journal of Engineering Thermophysics, 2002, 23: 118-120.
ZHANG Xingxiang, WEI Guohong, SANG Zhifu. Experimental research of heat transfer and flow friction properties in twisted tube heat exchanger [J]. Chemical Engineering, 2007, 35(2): 18-25.