Numerical analysis on solar air collector provided with artificial square shaped roughness for indirect type solar dryer
作者： L. Abhay , V.P. Chandramohan , V.R.K. Raju
DOI: 10.1016/J.JCLEPRO.2018.04.130
关键词:
摘要: Abstract Drying agricultural food products in an indirect type solar dryer (ITSD) is a topic of frequent research. Heat transfer rate to the fluid flow collector can be enhanced by providing artificial roughness on surface absorber plate. The present work concentrates air and heat characteristics provided with square shaped rib over ITSD. 2D numerical simulations are performed for through relevant Reynolds number (Re) which ranges from 3800 18,000. Re, relative pitch (P/e), height (e/D) thermo-hydraulic performance parameter (THPP) chosen as design variables. governing equations turbulent field solved using RNG k–ɛ turbulence model. simulation results compared smooth duct shows that roughened enhances friction factor (fr) 2.13 3.54 times, respectively. P/e = 7.14 gives better THPP 1.45 at Re 15000. It found additional drying chamber temperature 4 K gain 106% when upgraded surface. model validated experimental outcomes existing literature good agreement noticed.
sci-hub.se 参考文章(30)
Vipin B. Gawande, A. S. Dhoble, D. B. Zodpe, Sunil Chamoli, Experimental and CFD-based thermal performance prediction of solar air heater provided with chamfered square rib as artificial roughness Journal of the Brazilian Society of Mechanical Sciences and Engineering. ,vol. 38, pp. 643- 663 ,(2016) , 10.1007/S40430-015-0402-9
Soo Whan Ahn, Kang Pil Son, An Investigation on Friction Factors and Heat Transfer Coefficients in a Rectangular Duct with Surface Roughness Ksme International Journal. ,vol. 16, pp. 549- 556 ,(2002) , 10.1007/BF03185084
Muneesh Sethi, Varun, N.S. Thakur, Correlations for solar air heater duct with dimpled shape roughness elements on absorber plate Solar Energy. ,vol. 86, pp. 2852- 2861 ,(2012) , 10.1016/J.SOLENER.2012.06.024
Filiz Ozgen, Mehmet Esen, Hikmet Esen, Experimental investigation of thermal performance of a double-flow solar air heater having aluminium cans Renewable Energy. ,vol. 34, pp. 2391- 2398 ,(2009) , 10.1016/J.RENENE.2009.03.029
Riccardo Battisti, Annalisa Corrado, Environmental assessment of solar thermal collectors with integrated water storage Journal of Cleaner Production. ,vol. 13, pp. 1295- 1300 ,(2005) , 10.1016/J.JCLEPRO.2005.05.007
Apurba Layek, J.S. Saini, S.C. Solanki, Heat transfer and friction characteristics for artificially roughened ducts with compound turbulators International Journal of Heat and Mass Transfer. ,vol. 50, pp. 4845- 4854 ,(2007) , 10.1016/J.IJHEATMASSTRANSFER.2007.02.042
Sharad Kumar, R.P. Saini, CFD based performance analysis of a solar air heater duct provided with artificial roughness Renewable Energy. ,vol. 34, pp. 1285- 1291 ,(2009) , 10.1016/J.RENENE.2008.09.015
A. Lanjewar, J.L. Bhagoria, R.M. Sarviya, Experimental study of augmented heat transfer and friction in solar air heater with different orientations of W-Rib roughness Experimental Thermal and Fluid Science. ,vol. 35, pp. 986- 995 ,(2011) , 10.1016/J.EXPTHERMFLUSCI.2011.01.019
K. Prasad, S.C. Mullick, Heat transfer characteristics of a solar air heater used for drying purposes Applied Energy. ,vol. 13, pp. 83- 93 ,(1983) , 10.1016/0306-2619(83)90001-6
J.C. Han, Y.M. Zhang, High performance heat transfer ducts with parallel broken and V-shaped broken ribs International Journal of Heat and Mass Transfer. ,vol. 35, pp. 513- 523 ,(1992) , 10.1016/0017-9310(92)90286-2