Development of correlations for Nusselt number and friction factor for solar air heater with roughened duct having arc-shaped wire as artificial roughness

ASHRAE Standard 93-97, 1977. Methods of Testing to Determine the Thermal Performance of Solar Collectors. American Society of Heating, Refrigerating, and Air-conditioning Engineers Inc., Atlanta Ga. Bhagoria, J.L., Saini, J.S., Solanki, S.C., 1998. Thermo-hydraulic performance of a rectangular duct with wedge transverse ribs on one board heated wall. In: Proceeding of National Solar Energy Convention-98, Roorkee, India, pp. 926–932. Close, 1963, Solar air heaters for low and moderate temperature applications, Sol. Energy, 7, 117, 10.1016/0038-092X(63)90037-9 Dipprey, 1963, Heat and momentum transfer in smooth and rough tubes at various Prandtle numbers, Int. J. Heat Mass Transfer, 6, 329, 10.1016/0017-9310(63)90097-8 Gupta, D., Solanki, S.C., Saini, J.S., 1991. Enhancement of heat transfer in rectangular solar air heater ducts having artificial roughness on absorber plates. In: 11th National Heat and Mass Transfer Conference, IIT Madras, India. Gupta, 1993, Heat and fluid flow in rectangular solar air heater ducts having transverse rib roughness on absorber plates, Sol. Energy, 51, 31, 10.1016/0038-092X(93)90039-Q Han, 1985, Heat transfer enhancement in channels with turbulence promoters, Trans. ASME, J. Eng. Gas Turb. Power, 107, 628, 10.1115/1.3239782 Jourker, 2006, Heat transfer and friction characteristics of solar air heater duct using rib-grooved artificial roughness, Sol. Energy J., 80, 895, 10.1016/j.solener.2005.08.006 Karwa, R., 1998. Effect of duct depth on the thermo-hydraulic performance of a conventional solar air heater. In: Proceedings of National Solar Energy Convention-98, Roorkee, India, pp. 45–52. Malik, A., Saini, J.S., Solanki, S.C., 1998. Thermal and flow characteristics of duct with v-shaped ribs. In: Proceeding of National Solar Energy Convention-98, Roorkee, India, pp. 67–74. Muluwork, K.B., Saini, J.S., Solanki, S.C., 1998. Studies on discrete RIB roughened solar air heaters. In: Proceeding of National Solar Energy Convention-98, Roorkee, India, pp. 75–84. Nikuradse, J., 1952. Laws of flow in rough pipes NACA TM 1292. Prasad, 1988, Effect of artificial roughness on heat transfer and friction factor in a solar air heater, Sol. Energy, 41, 555, 10.1016/0038-092X(88)90058-8 Ravigururajan, 1985, General correlations for pressure drop and heat transfer for single-phase turbulent flow in internally ribbed tubes, J. ASME, 52, 9 Sahoo, 2005, Augmentation of heat transfer coefficient by using 900 broken transverse ribs on absorber plate of solar air heater, Renew. Energy, 30, 2057, 10.1016/j.renene.2004.10.016 Saini, 1997, Heat transfer and friction factor correlations for artificially roughened ducts with expended metal mesh as roughness element, Int. J. Heat Mass Transfer, 40, 973, 10.1016/0017-9310(96)00019-1 Sheriff, 1966, Heat-transfer and friction properties of surfaces with discrete roughness, Int. J. Heat Mass Transfer, 9, 1297, 10.1016/0017-9310(66)90130-X Thakur, N.S., Solanki, S,C., Saini, J.S., 1998. Performance prediction of packed bed solar air heater. In: Proceeding of National Solar Energy Convention-98, Roorkee, India, pp. 99–106. Varun, 2007, A review on roughness geometry used in solar air heaters, Int. J. Sol. Energy, 81, 1339 Webb, 1971, Heat transfer and friction in tubes with repeated rib roughness, Int. J. Heat Mass Transfer, 14, 601, 10.1016/0017-9310(71)90009-3