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IJSTR >> Volume 4 - Issue 10, October 2015 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Evaluation Of Friction Losses In Pipes And Fittings Of Process Engineering Plants

[Full Text]

 

AUTHOR(S)

F. W. Ntengwe, M. Chikwa, L. K. Witika

 

KEYWORDS

KEYWORDS: Friction-loss, Fittings, Flow-rates, Impact, Process, Engineering, Plants, Fluids-transport

 

ABSTRACT

ABSTRACT: The impact of flow rate (Q) on the head loss (hL) in pipes and fittings was studied on different sizes or diameters (D) of pipes fitted with gate valve, 45 and 90o bends using water as process fluid. Diameters of pipes ranged from 25 to 100 mm while the process fluid flow rates ranged from 0 to 50 m3/h. The Darcy-Weisbach, Hazen-Williams and Poisselli’s methods were used to evaluate friction losses. The results showing increasing D of the pipe and decreasing the hL in the pipe line, gate valve, 45o and 90o elbow, entry and exits to pipes are presented. The results of increasing Q with increasing exponential values of hL regardless of D of pipe also presented. Therefore, a number of choices can be made between transporting process fluids using small D pipes (50>D>25 mm) and Reynolds (Re) numbers in the laminar region and large D pipes (100>D>50 mm) using Re numbers in turbulent regions.

 

REFERENCES

[1] T. Stanton and J. Pannell, “Similarity of Motion in Relation to Surface Friction of Fluids”, Phil. Trans. R. Soc., vol. 214, pp. 199, 1914.

[2] R.L.Webb, R.G. Eckert and R.J. Goldstein, “Heat Transfer and Friction in Tubes With Repeated-Rib Roughness”, International Journal of Heat and Mass Transfer, vol. 14, no. 4, pp. 601-617, 1971.

[3] R.R. Rothfus, C.C. Monrad and V.F. Senecal, “Velocity Distribution and Fluid Friction in Smooth-Concentric Annuli”, Ind. Eng. Chem., vol. 42, no. 12, pp. 2511-2520, 1950.

[4] J.M. Couslson and J.M. Richardson, “Chemical Engineering: Fluid Flow, Heat Transfer and Mass Transfer”, vol.1, Butterworth-Heinemann, Oxford, pp. 58-72, 1999.

[5] K. Sudo, M. Sumida and H. Hibara, “Experimental Investigation on Turbulent Flow in a Circular-Sectioned 90o Bend”, Experiments in Fluids, vol. 25, pp. 42-49, 1998.

[6] D.H. BACON and R.C. STEPHENS, “Fluid Mechanics for Technicians”, TEC3/4, Butterworth & Co Ltd, Essex, pp. 59-66, 1982.

[7] E.A. Mostafa, “Correction Factor for Friction Head Loss Through Lateral and Maniford”, In: Eighth International Water Technology Conference, IWTC8, Alexandria, Egypt, pp. 735-749, 2004.

[8] H. ITO, “Friction Factors for Turbulent Flow in Curved Pipes”, Trans. ASME, J. Basic Eng., vol. 81D, pp. 123-134, 1959.

[9] R.P. Singh and P. Mishra, “Friction Factor For Newtonian and Non-Newtonian Fluid Flow in Curved Pipes”, J. Chem. Eng. Japan, vol. 13, pp. 275-280, 1980.

[10] S.K. Das, “Water Flow Through Helical Coils in Turbulent Conditions”, Can J. Chem. Eng., vol. 71, pp. 971-973, 1993.

[11] P.I. Spedding, E. Benard and G.M. McNally, “Fluid Flow Through 90o Bends”, Dev. Chem. Eng. Min. Process, vol. 12, pp. 107-128, 2004.

[12] J. Lohrenz and F. Kurata, “A Friction Factor Plot for Smooth Circular Conduits, Concentric Annuli and Parallel Plates”, Ind. Eng. Chemistry, vol. 52, no. 8, pp. 703-706, 1960.

[13] J. Turkey, “Exploratory Data Analysis”, Addison-Wesley, 1977.

[14] G.E.P. Box, W.G. Hunter and J.S. Hunter, “Statistics for Experimenters: An Introduction to Design, Data Analysis and Model Building”, John Wiley & Sons, New York, 1978.

[15] J. Chambers, W. Cleveland, B. Kleiner and T. Tukey, “Graphical Methods for Data Analysis”, Wadsworth., 1983.

[16] P. Velleman and D. Hoaglin, “The ADCs of EDA: Applications, Basics and Computing of Exploratory Data Analysis”, Duxbury, 1981.

[17] B.E. Larock, R.W. Jeppson and G.Z. Watters, “Hydraulics of Pipeline Systems”, CRC Press, LLC., No. 0-8493-1806-8, 2000.

[18] R.K. Sinnott, “Chemical Engineering Design”, 4th Ed., Butterworth-Heinemann, Oxford, UK, vol.6, pp. 194-207, 2005.

[19] L.B. Ellis and P.N. Joubert, “Turbulent shear flow in curved duct”, “Journal of Fluid Mechanics”, vol. 62, pp. 65-84, 1974.

[20] M. Chikwa, “Design and Analysis of Friction Loss in Piping Systems”. B. Eng Thesis, “Unpublished”, Copperbelt University, 2012.

[21] C.M. White, “Stream Line Flow Through Curved Pipes”, Proc. Roy. Soc. Vol. A123, pp. 645, 1929.