fred perry italia Twisted flat tube condenser heat

Twisted flat tube condenser heat transfer and fouling characteristics of experimental study

er knock VS. ReasexperimenteginningRe ◇ 1 group 2 group port flat tube flat tube flat tube group △ 3 Figure 8 to determine parameters of call-in dirt under the curve with Re Fig. 8Curvesofdeterminantparameter knock VS. Rein ~ uHng can see the trial began, the tubes are clean and dirt-free state, the twisted flat tube heat exchanger to determine parameters, 7 decreases with increasing Re, indicating that as the Re increases, twisted flat tube heat exchanger combined effect of enhanced heat transfer deterioration. When Re 22000 when r /> l, 2 pipe in Re> 12000 when r /> l, 3 pipe in Re> 4000 when the r /> l. Re is the scope of the twisted flat tube corresponding to each test the best work area, in this work area, the use of twisted flat tube as a heat exchange tube has a high application value. 3 Conclusions 1) The twisted flat tube with helical flow in the large Re can significantly increase the spin-off of the dirt wall on the role in the strengthening effect of Re small detachment is not obvious. 2) state in the absence of dirt, Re 22000, Re> 12000, Re> 4000. References [1】 Gu D algae, God, Eason, MA Chongfang, et al. Heat transfer [M】. Beijing: Science Press ,1990:139-143. [2】 SK,[link widoczny dla zalogowanych], Xia Qing. Flat tube heat exchanger spiral heat transfer and pressure drop performance [J]. Chemical Industry and Engineering, l995.46 (5): 601 ~ 607. [3】 ButterworthDavid. DesignandApplicationofTwistedTubeExchanger [C】. Proc. ofAdvancesinIndustrialHeatTransferConference. Birmingham. 1996.87 - 95. [4】 Zhang Xingxiang, Zhi-Fu Sang. Twisted flat tube heat transfer and pressure drop performance of simulation [J]. Chemical Machinery, 2006,[link widoczny dla zalogowanych],33 (1) :24-28. [5】 Kenny Wong, Deng first and, Wang Jun Yang, et al. Spiral elliptical flat tube heat transfer [J]. Petrochemical equipment, 2003,32 (3) :1-4. [6】 Meng, Li Zhixin, Guo, et al. Distorted elliptical spiral tube laminar heat transfer and flow resistance characteristics of simulation [J】, Engineering Thermophysics, 2002,[link widoczny dla zalogowanych],23 (6) :117-120. [7】 Yang Li, Li Zhixin. Twisted elliptic tube Numerical Study of Laminar Heat Transfer [J】 l Engineering Mechanics, 2003,20 (5) :144-148. [8】 ButterworthDavid. Insight: ATwistintheTale [J】. ChemicalEngineer ,1997,[link widoczny dla zalogowanych],9:21-24. [9】 Liang Longhu. Spiral flat tube heat exchanger performance and industrial application [J】. Refining the design, 2001,31 ( Cool

:28-33. [10】 DQKernandRESeaton. SurfaceFouling: HowtoLimit [J], Br. Chem. Eng. 1959,55 (6) :71-73. [11】 Yang Shiming,[link widoczny dla zalogowanych], Tao Wen-Quan. Heat Transfer [M】. Third Edition. Higher Education Press ,1998:338-340.

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