[1] Goel, V., Hans, V.S., Singh S., Kumar R., Pathak S.K., Singla M., Bhattacharyya S., and Almatrafifh E., Gill R.S., Saini R.P., "A comprehensive study on the progressive development and applications of solar air heaters", Solar Energy, https://doi.org/10.1016/j.solener.2021.07.040, 2021.
[2] Yeh, H.M., Ho, C.D., and Hou, J.Z., "Collector efficiency of double-flow solar air heaters with fins attached", Energy, Vol. 27, PP. 715–27, 2002. https://doi.org/10.1016/S0360-5442(02)00010-5
[3] Yeh, H.M., and Ho, C.D., "Solar air heaters with external recycle", Applied Thermal Engineering, Vol. 29, pp. 1694–1701, 2009. https://doi.org/10.1016/j.applthermaleng.2008.07.027
[4] Singh, I., and Singh, S., "A review of artificial roughness geometries employed in solar air heaters", Renewable and Sustainable Energy Reviews, Vol. 92, pp. 405–425, 2018. https://doi.org/10.1016/j.rser.2018.04.108
[5] Prasad, B.N., and Saini, J.S., "Effect of artificial roughness on heat transfer and friction factor in a solar air heater", Solar Energy, Vol. 41 No. 6, pp. 555–560, 1988. https://doi.org/10.1016/0038-092X(88)90058-8
[6] Chaube, A., Sahoo, P.K., and Solanki, S.C., "Analysis of heat transfer augmentation and flow characteristics due to rib roughness over absorber plate of a solar air heater", Renew Energy, Vol. 31, pp. 317–331, 2006. https://doi.org/10.1016/j.renene.2005.01.012
[7] Karwa, R., and Chauhan, K., "Performance evaluation of solar air heaters having v-down discrete rib roughness on the absorber plate", Energy, Vol. 35, pp. 398–409, 2010. https://doi.org/10.1016/j.energy.2009.10.007
[8] Aharwal, K.R., Gandhi, B.K., and Saini, J.S., "Heat transfer and friction characteristics of solar air heater ducts having integral inclined discrete ribs on absorber plate", International Journal of Heat and Mass Transfer, Vol. 52, pp. 5970–5977, 2009. https://doi.org/10.1016/j.ijheatmasstransfer.2009.05.032
[9] Saini, S.K., and Saini, R.P., "Development of correlations for Nusselt number and friction factor for solar air heater with roughened duct having arc-shaped wire as artificial roughness". Solar Energy, Vol. 82, No. 12, pp. 1118–1130, 2008. https://doi.org/10.1016/j.solener.2008.05.010
[10] Yeh, H.M., and Ho, C.D., "Effect of external recycle on the performances of flat-plate solar air heaters with internal fins attached", Renewable Energy, Vol. 34, pp. 1340–1347, 2009. https://doi.org/10.1016/j.renene.2008.09.005
[11] Yeh, H.M., and Ho, C.D., "Solar air heaters with external recycle", Applied Thermal Engineering, Vol. 29, pp. 1694–1701, 2009. https://doi.org/10.1016/j.applthermaleng.2008.07.027
[12] Mohammadi, K., and Sabzpooshani, M., "Appraising the performance of a baffled solar air heater with external recycle", Energy Conversion and Management, Vol. 88, pp. 239-250, 2014. https://doi.org/10.1016/j.enconman.2014.08.009
[13] Ahmadkhani, A., Sadeghi, Gh., and Safarzadeh, H., "An in depth evaluation of matrix, external upstream and downstream recycles on a double pass flat plate solar air heater efficacy", Thermal Science and Engineering Progress Vol. 21, pp. 100789, 2021. https://doi.org/10.1016/j.tsep.2020.100789
[14] Saini, RP, and Verma, J, "Heat transfer and friction factor correlations for a duct having dimple-shape artificial roughness for solar air heaters", Energy Vol. 33, pp. 1277–1287, 2008. https://doi.org/10.1016/j.energy.2008.02.017
[15] Singh, I., and Sing, S., "A review of artificial roughness geometries employed in solar air heaters", Renewable and Sustainable Energy Reviews Vol. 92, pp. 405-425, 2018. https://doi.org/10.1016/j.rser.2018.04.108
[16] Raminder, S.G., Vishavjeet, S.H., and Rupinder PS, "Optimization of artificial roughness parameters in a solar air heater duct roughened with hybrid ribs", Applied Thermal Engineering Vol. 19, pp. 1-12, 2021. https://doi.org/10.1016/j.applthermaleng.2021.116871
)