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Tuesday, July 14, 2020 | History

1 edition of Film condensation of steam on externally finned horizontal tubes found in the catalog.

Film condensation of steam on externally finned horizontal tubes

Frederick A. Flook

Film condensation of steam on externally finned horizontal tubes

by Frederick A. Flook

  • 386 Want to read
  • 9 Currently reading

Published by Naval Postgraduate School in Monterey, California .
Written in English

    Subjects:
  • Mechanical engineering

  • ID Numbers
    Open LibraryOL25519543M

    The steam piping (with steam flowing through it) is directed through the flue gas path in the boiler furnace. This area typically is between degrees Celsius ( degrees Fahrenheit). Some superheaters are radiant type (absorb heat by radiation), others are convection type (absorb heat via a fluid i.e. gas) and some are a. Laminar Falling Film Heat transfer Coefficients on a Large Diameter Horizontal Tube, The Canadian Journal of Chemical Engineering, Vol. 67, pp, [7] Parken W.H., Heat transfer to thin films on horizontal tubes, PhD Thesis, Rutgers University, [8] Nusselt W., Der Wärmeaustausch amFile Size: 1MB.

    Steam Condensation in the Presence of a Noncondensable Gas in a Horizontal Tube, Evaporation, Condensation and Heat transfer, Amimul Ahsan, IntechOpen, DOI: / Available from: Kwon-Yeong Lee and Moo Hwan Kim (September 12th ).Cited by: 6. Dropwise and Filmwise condensation Filmwise condensation Unless specially treated, most materials are wettable as con-densation occurs a film condensate spreads over the thickness of the film depends upon a numbers of factors, e.g. the rate of condensation,the viscosity of the con-File Size: KB.

    condensation heat transfer of Ra in inclined corrugated tube. The effect of saturation temperature ranging from 30°C to 50°C on condensation heat transfer in inclined tubes for Ra was investigated by Meyer et al. [20]. As they reported, an increase in saturation temperature increases the effect of inclination on two phase heat transfer. R, Page 1 Investigation of R Condensing Outside of a Horizontal 3-D Externally Rectangular Finned Tube and Tube Bundle Xiangfei Liang1, Lihua Zhai1, Rong Zhuang1, Guoqing Gan2 1Refrigeration Institute of Gree Electric Appliances, Inc. of Zhuhai, Jinji .


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Film condensation of steam on externally finned horizontal tubes by Frederick A. Flook Download PDF EPUB FB2

The film condensation heat transfer performance of six externally finned copper tubes has been evaluated. All tubes had rectangular-shaped fins with a height and thickness of 1 mm. The spacing between fins was,and mm. Data were also obtained for a smooth tube whose outside diameter of mm was equal to the Cited by:   Film condensation of steam on externally finned horizontal tubes.

Item Preview remove-circle Film condensation of steam on externally finned horizontal tubes. by Flook, Frederick A. Publication date some content may be lost due to the binding of the book. Addeddate Call number ocn CameraPages: @article{osti_, title = {Film condensation of steam on externally enhanced horizontal tubes.

Master's thesis}, author = {Mitrou, E.S.}, abstractNote = {Heat-transfer measurements were made for filmwise condensation of steam on externally enhanced horizontal tubes under vacuum and at atmospheric pressure.

Data were obtained for copper tubes with circular fins of rectangular, triangular. Enhanced film condensation of steam on a horizontal finned tube Article in Desalination and water treatment 50() December with 34 Reads How we measure 'reads'.

condensation of steam over horizontal finned tubes. Medium surface tension fluids Medium surface tension fluids which have surface tension between to Pa-m. Masuda and Rose [14] studied the condensation of ethylene glycol on thirteen finned tubes at atmospheric pressure.

The tube with mm fin spacing was. The film condensation heat transfer performance of six externally finned copper tubes has been evaluated. All tubes had rectangular-shaped fins with a height and thickness of 1 mm. ELSEVIER Desalination () DESALINATION Enhanced film condensation of steam on spirally timed tubes N.H.

Aly, S.D. Bedrose Reactors Department, Heat Transfer Laboratory and Desalination Laboratory, Atomic Energy Authority, Cairo, Egypt Received 5 April ; accepted 20 December Abstract Film condensation of stagnant water vapor on both vertical and horizontal Cited by: 5.

Honda et al, 40, 41, 42 studied the row-by-row film condensation of R on staggered tube bundles of horizontal finned tubes, of R on in-line tube bundles of horizontal finned tubes, of downward flowing R in staggered finned-tube bundles, and of downward flowing R Cited by: For condensation on horizontal low-finned tubes, the dependence of heat-transfer performance on fin spacing has been investigated experimentally for condensaticn of refrigerant and ethylene glycol.

Fourteen tubes have been used with inside diamete~ mm and working length exposed to vapour mm. The tube had rectangular. Abstract. Accurate, repeatable heat-transfer data have been obtained for condensation of steam and CFC on integral-fin tubes made of copper, brass and bronze, with rectangular-section fins having fin spacing of 1 mm, fin heights in the range mm to mm and fin thicknesses in the range mm to mm; all other geometric parameters were the same for all tubes.

Experimental data are presented on heat exchange and capillary retention of liquid during vapor condensation on horizontal finned cylinders in a wide range of variation of the geometrical and hydrodynamic by: 1. Honda H, Nozu S, Takeda Y () A theoretical model of film condensation in a bundle of horizontal low finned tubes.

J Heat Transfer CrossRef Google Scholar Ji WT, Zhao CY, Zhang DC, Li ZY, He YL, Tao WQ () Condensation of Ra outside single horizontal titanium, cupronickel (B10 and B30), stainless steel and copper : Harald Klein, Alexander Büchner.

Inside Vertical Tubes. For condensation inside vertical tubes, use the gravity controlled "outside vertical" or the shear controlled value of the heat transfer coefficient, whichever is larger.

Inside Horizontal Tubes. As condensation occurs inside a horizontal tube, some liquid pools in the bottom. This reduces the flow area and changes heat. (Problem in the Book) A horizontal tube of mm outer diameter, with a surface temperature of 34oC, is exposed to steam at bar. Estimate the condensation rate and heat transfer rate per unit length of the tube.

Schematic: Assumptions: (1) Laminar film condensation, (2) Negligible non-condensibles in Size: KB. An Experimental Study of R Film Condensation on Horizontal Integral-Fin Tubes J. Heat Transfer (August, ) Film Condensation of R on In-Line Bundles of Horizontal Finned TubesCited by: Augmentation of horizontal in-tube condensation of steam A Dissertation Submitted to the Graduate Faculty in Partial Fulfillment of The Requirements for the Degree of DOCTOR OF PHILOSOPHY Major: Mechanical Engineering by John Henri Royal In Charge of Major #ork Iowa State University Ames, Iowa Signature was redacted for privacy.

Extensive data have been accumulated at HTRI for the shellside condensation heat transfer on two types of integral low-finned tube bundles. The data covered a full range of flow regimes from gravity- to shear-controlled regimes for pure fluids over a wide range of fluid properties from low surface tension to very high surface tension.

condensation of steam-air mixtures in a horizontal effects of inlet fluid temperature,air mass concentration and tube diameter on the rate of condensation were investigated. It was found that condensation heat transfer coefficient drops by approximately 50% within an air mass of 3% and there after the drop in the heat transfer.

With ξ 0 =Eq. (3) gives values of α i much higher than the heat transfer coefficient for the condensate in film condensation, except in the case of liquid metals. For example, for steam at 30°C, α i ≈ MW/m 2 K, which may be compared with typical values of the heat transfer coefficient in the range 10–50 kW/m 2 K for the condensate film during film condensation.

observed: film condensation and drop condensation. In film condensation: In film condensation, the condensate wets the surface and forms a liquid film on the surface that slides down under the influence of gravity.

The liquid film thickness increases in the flow direction as more vapor condenses on the film. This is how condensation. Honda, H., Nozu, S. and Mitsumori, K. () Augmentation of Condensation on Horizontal Finned Tubes by Attaching a Porous Drainage Plate.

Proc. ASME-JSME Thermal Engng. Joint Conf., 3, Honda, H. and Nozu, S. () A Prediction Method for Heat Transfer during Film Condensation on Horizontal Integral Fin Tubes. J. Heat Transfer, Equation 9 is the Nusselt equation for laminar film condensation in vertical tubes; the constant has been increased by 20% as recommended by McAdams () on the basis of comparison with test data.

An improved and extended general correlation for heat transfer during condensation in plain tubes.Chapter 8: Condensation In order to use boundary layer theory to describe the condensation problem, the following assumptions must be made: 1.

Tw, TI, Tv∞, ωlv∞, uvI, u I and uv∞ are independent of x. 1. The condensate film and binary vapor boundary layers both develop .