Second law analysis for optimal thermal design of radial fin geometry by convection

Taufiq, B.N. and Masjuki, Haji Hassan and Mahlia, T.M.I. and Saidur, Rahman and Faizul, M.S. and Niza Mohamad, E. (2007) Second law analysis for optimal thermal design of radial fin geometry by convection. Applied Thermal Engineering, 27 (8-9). pp. 1363-1370. ISSN 1359-4311, DOI

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This paper presents a second law analysis for the optimal geometry of fin array by forced convection. The analytical analysis involves the achievement of a balance between the entropy generation due to heat transfer and entropy generation due to fluid friction. In the design of a thermal system, it is important to minimize thermal irreversibilities because the optimal geometry will be found when the entropy generation rate is minimized. In this paper, the entropy generation rate is discussed and optimum thickness for fin array is determined on the basis of entropy generation minimization subjected to the global constraint. In addition, the influence of cost parameters on the optimum thickness of fin array is also considered and presented in graphical form. It has been found that the increase in cross flow fluid velocity will enhance the heat transfer rate that will reduce the heat transfer irreversibility.

Item Type: Article
Additional Information: Cited By (since 1996): 22 Export Date: 6 December 2012 Source: Scopus CODEN: ATENF Language of Original Document: English Correspondence Address: Taufiq, B.N.; Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia; email: References: Laor, K., Kalman, H., Performance and optimum dimensions of different cooling fins with a temperature-dependent heat transfer coefficient (1996) International Journal of Heat and Mass Transfer, 39 (9), pp. 1993-2003; Yu, L.T., Chen, C.K., Optimization of circular fins with variable thermal parameters (1999) Journal of the Franklin Institute, (336 B), pp. 77-95; Heggs, P.J., Ooi, T.H., Design charts for radial rectangular fins in terms of performance ratio and maximum effectiveness (2004) Applied Thermal Engineering, 24, pp. 1341-1351; Lai, C.-Y., Kou, H.-S., Lee, J.-J., Optimum thermal analysis of annular fin heat sink by adjusting outer radius and fin number (2006) Applied Thermal Engineering, 26, pp. 927-936; Kraus, A.D., Aziz, A., Welty, J., (2001) Extended Surface Heat Transfer, , John Wiley & Sons Inc, USA; Bejan, A., (1995) Convective Heat Transfer. second ed., , Wiley, New York; Bejan, A., (1996) Entropy Generation Minimization, , CRC press, New York; Mahmud, S., Fraser, R.A., The second law analysis in fundamental convective heat transfer problems (2003) International Journal of Thermal Sciences, (42), pp. 177-186; Abu-Hijleh, B.A., Abu-Qudais, M., Abu Nada, E., Numerical prediction of entropy generation due to natural convection from a horizontal cylinder (1999) Energy - The International Journal, (24), pp. 327-333; Mahmud, S., Fraser, R.A., Second law analysis of heat transfer and fluid flow inside a cylindrical annular space (2002) Exergy, An International Journal, 2, pp. 322-329; Lin, W.W., Lee, D.J., Second-law analysis on a plate-fin array under cross flow (2000) International Communications in Heat and Mass Transfer, 27 (2), pp. 179-190; Sara, O.N., Yapici, S., Yilmaz, M., Pekdemir, T., Second law analysis of rectangular channels with square pin-fins (2001) International Communications in Heat and Mass Transfer, 28 (5), pp. 617-630; Lin, W.W., Lee, D.J., Second-law analysis on a pin-fin array under crossflow (1997) International Journal of Heat and Mass Transfer, 40 (8), pp. 1937-1945; Shuja, S.Z., Zubair, S.M., Khan, M.S., Thermoeconomic design and analysis of constant cross-sectional area fins (1999) Heat and Mass Transfer, 34, pp. 357-364; Shuja, S.Z., Optimal fin geometry based on exergoeconomic analysis for a pin-fin array with application to electronic cooling (2002) Exergy, An International Journal, (2), pp. 248-258; Razelos, Kakatsios, X., Optimum dimensions of convecting-radiating fins: Part I - longitudinal fins (2002) Applied Thermal Engineering, 20, pp. 1161-1192; Bejan, A., (2000) Shape and Structure, From Engineering to Nature, , Cambridge University Press, United Kingdom
Uncontrolled Keywords: Convection; Fin array; Fin design; Optimum; Second law; Entropy; Heat convection; Heat transfer; Internal friction; Thermal effects; Thickness measurement; Fin arrays; Fin designs; Fluid friction; Second law analysis; Fins (heat exchange).
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 09 Jul 2013 01:06
Last Modified: 18 Oct 2018 05:13

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