Vol 7, No 2 (2016) > Mechanical Engineering >

Optimization of the Friction Factor and Frictional Pressure Drop of R22 and R290

Normah Ghazali, Qais Abid Yousif, Agus S. Pamitran, Sentot Novianto, Robiah Ahmad



Today, the air-conditioning and
refrigeration industry is still searching for environmentally friendly
refrigerants that could replace hazardous, ozone-depleting coolants –
refrigerants that behave similarly, if not better, than the present ones. The
present study examines optimization of the frictional pressure drop of R22 and
R290 using genetic algorithm. Outcomes are compared against the measured
pressure drop obtained from a horizontal 7.6 mm channel with a length of 1.07
meters. Three equations have been used for calculating the Darcy friction
factor and two-phase flow pressure drop for both laminar and turbulent flow
regimes in smooth and rough tubes. The effects of the different correlations
for the friction factor and pressure drop utilized are demonstrated. The
results illustrate that the differences between values of the Darcy friction
factor are very small for the two refrigerants examined, with the frictional
pressure of R-290 higher than R-22. Use of a smaller channel induced a much
higher frictional pressure drop, as well.

Keywords: Darcy friction factor; Genetic algorithm; Optimization; Pressure drop

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Awad, M.M., Muzychka, Y.S., 2008. Effective Property Models for Homogeneous Two-Phase Flows. Experimental Thermal and Fluid Science, Volume 33(1), pp. 106–113

Bergman, T.L., Lavine, A.S., Incropera, F.P., DeWitt, D.P., 2011. Fundamentals of Heat and Mass Transfer, John Wiley & Sons, Inc., Hoboken, New Jersey, USA

Brown, G.O., 2002. Henry Darcy and the Making of A Law. Water Resources Research, Volume 38(7), pp. 11-1–11-12

Colebrook, C.F. 1939, Turbulent Flow in Pipes, with Particular Reference to the Transition Region between the Smooth and Rough Pipe Laws. Journal of the ICE, Volume 11(4), pp. 133–156

Colebrook, C.F., White, C.M., 1937. Experiments with Fluid Friction in Roughened Pipes. In: the Proceedings of the Royal Society of London, Series A, Mathematical and Physical Sciences, pp. 367–381

Collier, J.G., Thome, J.R., 1994. Convective Boiling and Condensation, Oxford Engineering Science Series, Book 38, Oxford University Press Inc. New York, USA

Gosselin, L., Tye-Gingras, M., Mathieu-Potvin, F., 2009. Review of Utilization of Genetic Algorithms in Heat Transfer Problems. International Journal of Heat and Mass Transfer, Volume 52(9), 2169–2188

Hager, W.H., 2003. Blasius: A Life in Research and Education. Experiments in Fluids, Volume 34(5), pp.566–571

Halelfadl, S., Adham, A.M., Mohd-Ghazali, N., Maré, T., Estellé, P., Ahmad, R., 2014. Optimization of Thermal Performances and Pressure Drop of Rectangular Microchannel Heat Sink using Aqueous Carbon Nanotubes Based Nanofluid. Applied Thermal Engineering, Volume 62(2), pp. 492–499

Manning, F.S., Thompson, R.E., 1991. Oilfield Processing of Petroleum Volume One: Natural Gas. Pennwell Publishing Company, Tulsa, Oklahoma, USA

McAdams, W.H., Woods, W.K., Heroman, L.C., 1942. Vaporization inside Horizontal Tubes-II-Benzene-Oil Mixtures. Transactions of the A.S.M.E., Volume 64(3), pp. 193–200

Molina, M.J., Rowland, F.S., 1974. Stratospheric Sink for Chlorofluoromethanes–Chlorine Atom Catalyzed Destruction of Ozone. Nature, Volume 249(5460), pp. 810–812

Moody, L.F., 1944. Friction Factors for Pipe Flow. Transactions of the A.S.M.E., Volume 66, pp. 671–684

Normah, G.M., Oh, J.T., Chien, N.B., Choi, K.I., Robiah, A., 2015. Comparison of the Optimized Thermal Performance of Square and Circular Ammonia-Cooled Microchannel Heat Sink with Genetic Algorithm. Energy Conversion and Management, Volume 102, pp. 59–65

Pfitzner, J., 1976. Poiseuille and His Law. Anaesthesia, Volume 3(2), pp. 273–275

Serghides, T.K., 1984. Estimate Friction Factor Accurately. Chemical Engineering, Volume 91(5), pp. 63–64

Sutera, S.P., Skalak, R., 1993. The History of Poiseuille's Law. Annual Review of Fluid Mechanics, Volume 25(1), pp. 1–20