Nusselt Number Correlation of SAH
Abstract
This paper presents the experimentally investigated thermal performance of a single pass solar air heater. The effects of mass flow rate of air on the outlet temperature, Nusselt Number, Reynolds Number, Prandtl Number, heat transfer in the thickness of the solar collector and thermal efficiency were studied. Experiments were performed for the mass flow rates of 0.0108, 0.0145 and 0.0184 kg/s. For this effect was have created a new correlation correspondent of solar air collector with using fins it was written Nu=K1Re^0.939 Pr^0.523 exp(1.2 m) h^(0.0505Pr).The maximum efficiency levels obtained for the 0.0108, 0.0145 and 0.0184 kg/s were 28.63, 39.69 and 55.69% respectively. A comparison of the results of the solar collector without fins shows a substantial enhancement in thermal efficiency.References
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[40] Saini, R.P., Saini, J.S., 1997. Heat transfer and friction factor correlations for artificially roughened ducts with expended metal mesh as roughness element. Int. J. Heat Mass Transfer 40 (4), 973–986.
[2] Karsli S.: Performance analysis of new-design solar air collectors for drying applications: Renew Energ 2007; 32(10):1645–60.
[3] Romdhane BS.: The air solar collectors: Comparative study, Introduction of baffles to favor the heat transfer: Sol Energy 2007; 81(1):139–149.
[4] Omojaro AP, Aldabbagh LBY.: Experimental performance of single and double pass solar air heater with fins and steel wire mesh as absorber. Appl Energ 2010; 87(12):3759–3765.
[5] Close D.J.; Dunkle R.V. Behaviour of adsorbent energy storage beds. Sol. Energy 1976, 18 (4), 287-292.
[6] Liu C.H.; Sparrow E.M. Convective-radiative interaction a parallel plate channel-application to air-operated solar collectors. Int. J. Heat Mass Transf. 1980, 23 (8), 1137-1146.
[7] Seluck M.K.Solar air heaters and their applications, A.A.M. Sayigh ed; New York, Academic Press, 1977.
[8] Tan H.M.; Charters WWS, Experimental investigation of forced-convective heat transfer for fully-325 developed turbulent flow in a rectangular duct with asymmetric heating. Sol. Energy 1970, 13 (1), 121-125.
[9] Whillier A. Plastic covers for solar collectors Sol. Energy 1963, 7 (3), 148-154.
[10] Yeh H.M.; Ho C.D.; Hou J.Z. Collector efficiency of double-flow solar air heaters with fins attached. Energy 2002, 27 (8), 715-727.
[11] Kreith F.; Kreider J.F. Principles of solar engineering. 2nd ed.; McGraw-Hill, New York, 1978
[12] Duffie J.A.; Beckman W.A. Solar engineering of thermal processes. 3rd ed.; Wiley, New York, 1980
[13] Tonui J.K.; Tripanagnostopoulos Y. Improved PV/T solar collectors with heat extraction by forced or natural air circulation. Renew. Energy 2007, 32 (4), 623-637.
[14] Gao W.; Lin W.; Liu T.; Xia C. Analytical and experimental studies on the thermal performance of cross-corrugated and flat-plate solar air heaters. Appl. Energy 2007, 84 (4),425-41.
[15] Mohamad A.A. High efficiency solar air heater. Sol. Energy 1997, 60 (2), 71-76.
[16] Verma S.K.; Prasad B.N. Investigation for the optimal thermohydraulic performance of artificially roughened solar air heaters. Renew. Energy 2000, 20 (1), 19-36.
[17] Yeh H.M. Theory of baffled solar air heaters. Energy 1992, 17 (7), 697-702.
[18] Garg H.P.; Sharma V.K.; Bhargava A.K. Theory of multiple-pass solar air heaters. Energy 1985, 10 (5), 589-599.
[19] Ho C.D.; Yang W.Y., An analytical study of heat-transfer efficiency in laminar counter flow concentric circular tubes with external refluxes. Chem. Eng. Sci. 2003, 58 (7), 1235-1250.
[20] Ho C.D.; Yeh C. W.; Hsieh S.M. Improvement in device performance of multi-pass flat-plate solar 346 air heaters with external recycle. Renew. Energy 2005, 30 (10), 1601-1621.
[21] Ho C.D.; Yeh H.M.; Chiang S.C. Mass-transfer enhancement in double-pass mass exchangers 348 with external refluxes. Ind. Eng. Chem. Res. 2001, 40 (24), 5839-5846.
[22] Nwachukwu PN.: Employing exergy-optimized pin fins in the design of an absorber in a solar air heater: Energy 2010; 35(2):571–575.
[23] El-Sebaii AA, Aboul-Enein S, Ramadan MRI, Shalaby SM, Moharram BM.: Thermal performance investigation of double pass-finned plate solar air heater: Appl Energ, 2011; 88(5):1727–1739.
[24] Lin W, Gao W, Liu T.: A parametric study on the thermal performance of cross-corrugated solar air collectors: Appl Therm Eng 2006; 26(10):1043–1053.
[25] Gao W, Lin W, Liu T, Xia C.: Analytical and experimental studies on the thermal performance of cross-corrugated and flat-plate solar air heaters: Appl Energ 2007;84(4):425–441.
[26] Chabane F, Moummi N, Benramache S.: Performances of a single pass solar air collector with longitudinal fins inferior an absorber plate: Am J Adv Sci Res 2012; 1(4): 146-157.
[27] Chabane F, Moummi N, Benramache S.: Experimental study on heat transfer for a solar air heater and contribution the fins to improve the thermal efficiency. Int J Adv Renew Energ Res 1, 2012, 487-494.
[28] Chabane, F, Moummi, N, Benramache, S.: Experimental performance of solar air heater with internal fins inferior an absorber plate, in the region of biskra. Int J Energ & Tech 4, 2012, 1–6.
[29] Bhushan, B., Singh, R.: A review on methodology of artificial roughness used in duct of solar air heaters. Energ 35, 2010, 202–212.
[30] Varun, Saini.R.P. Singal, S.K.: A review on roughness geometry used in solar air heaters. Sol Energ 81, 2007, 1340–1350.
[31] Gupta, D., Solanki, S.C., Saini, J.S.: Heat and fluid flow in rectangular solar air heater ducts having transverse rib roughness on absorber plates. Sol Energ 51, 1993, 31–37.
[32] Jaurker, A.R., Saini, J.S., Gandhi, B.K.: Heat transfer and friction characteristics of rectangular solar air heater duct using rib-grooved artificial roughness. Sol Energ 80, 2006, 895–907.
[33] Karwa, R.: Experimental studies of augmented heat transfer and friction in asymmetrically heated rectangular ducts with ribs on the heated wall in transverse, inclined, v-continuous and v-discrete pattern. Int Commun Heat & Mass Transfer 30, 2003, 241–250.
[34] Karmare, S.V., Tikekar, A.N.: Heat transfer and friction factor correlation for artificially roughened duct with metal grit ribs. Int J Heat & Mass Transfer 50, 2007, 4342–4351.
[35] Momin, A.M.E., Saini, J.S., Solanki, S.C.: Heat transfer and friction in solar air heater duct with V-shaped rib roughness on absorber plate. Int J Heat & Mass Transfer 45, 2002, 3383–3396.
[36] Saini, R.P., Saini, J.S.: Heat transfer and friction factor correlations for artificially roughened ducts with expanded metal mesh as roughness element. Int J Heat & Mass Transfer 40, 1997, 973–986.
[37] McAdams WH.: Heat Transmission, McGraw-Hill, New York, 1954.Klein, S.A. Sol Energy 17, 1975, 79–80.
[38] Azad E. Design installation and operation of a solar thermal public bath in eastern Iran. Energ Sustai Dev 16, 2012, 68–73.
[39] Tiwari, G.N.: (2002) Solar energy: fundamentals, design modeling and applications. New York and New Delhi: CRC Press and Narosa Publishing House N°. 247.
[40] Saini, R.P., Saini, J.S., 1997. Heat transfer and friction factor correlations for artificially roughened ducts with expended metal mesh as roughness element. Int. J. Heat Mass Transfer 40 (4), 973–986.
Published
2013-05-10
How to Cite
CHABANE, Foued et al.
Nusselt Number Correlation of SAH.
Journal of Power Technologies, [S.l.], v. 93, n. 2, p. 100--110, may 2013.
ISSN 2083-4195.
Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/409>. Date accessed: 27 apr. 2024.
Issue
Section
Renewable and Sustainable Energy
Keywords
Correlation, Solar air collector, Heat transfer, Design, Temperature, Nusselt number.
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