Experimental investigation of augmented thermal and performance characteristics of solar air heater ducts due to varied orientations of roughness geometry on the absorber plate

• Autorzy: Sahu Mukesh Kumar , Matheswaran M. M. , Bishnoi Pardeep

Identyfikatory

DOI

10.24425/ather.2020.134576

• Języki publikacji: EN

Abstrakty

EN

This paper presents the outdoor experimental results for thermal performance analysis of artificially roughened solar air heaters (SAHs). Circular wire ribs have been arranged to form arc shape geometry on the absorber plates and have been tested for two configurations of SAHs named as arc shape apex-downstream flow and arc shape apex-upstream flow SAH. Roughness parameters have been taken as relative roughness pitch in the range of 8–15, angle of attack 45°–75°, and for fixed relative roughness height of 0.0454, duct width to duct height ratio of 11. During the experimental analysis the mass flow rate varied from 0.0100 to 0.0471 kg/s. Based on the experimental results it was found that roughness with apexupstream flow SAH is having higher value of thermal efficiency, heat removal factor and collector efficiency factor as compared to roughness with apexdownstream flow SAH and simple absorber plate SAH. In the range of the operating parameters investigated the maximum of thermal efficiency, heat removal factor, and collector efficiency factor have been found.

Słowa kluczowe

EN

solar air heater; SAH; thermal efficiency; heat removal factor; collector efficiency factor; artificial roughness; heat transfer rate

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2020
• Tom: Vol. 41, no 3
• Strony: 147--182
• Opis fizyczny: Bibliogr. 33 poz., rys., tab., wykr., wz.

Twórcy

autor

Sahu Mukesh Kumar

• Department of Mechanical Engineering, National Institute of Technology, Jamshedpur Jharkhand, Pin-831014, India

autor

Matheswaran M. M.

• Department of Mechanical Engineering, Jansons Institute of Technology, Karumathampatti, Coimbatore, Tamil Nadu, 641659, India

autor

Bishnoi Pardeep

• Department of Mechanical Engineering, Chandigarh Engineering College, Mohali, Punjab, 140307, India

Bibliografia

• [1] Prasad B.N., Saini J.S.: Effect of artificial roughness on heat transfer and friction factor in a solar air heater. Sol. Energy 41(1988), 555–560.
• [2] Gupta D., Solanki S.C., Saini J.S.: Thermohydraulic performance of solar air heaters with roughened absorber plates. Sol. Energy 61(1997), 33–42.
• [3] Aharwal K.R., Gandhi B.K., Saini J.S.: Experimental investigation on heattransfer enhancement due to a gap in an inclined continuous rib arrangement in a rectangular duct of solar air heater. Renew. Energ. 33(2008), 585–596.
• [4] 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 Tran. 45(2002), 16, 3383–3396.
• [5] Hans V.S, Saini R.P., Saini J.S.: Heat transfer and friction factor correlations for a solar air heater duct roughened artificially with multiple V-ribs. Sol. Energy 84(2010), 898–911.
• [6] Kumar A., Saini R.P., Saini J.S.: Development of correlations for Nusselt number and friction factor for solar air heater with roughened duct having multi v-shaped with gap rib as artificial roughness. Renew. Energ. 58(2013), 151–163.
• [7] Kumar A., Bhagoria J.L., Sarviya R.M.: Heat transfer enhancement in channel of solar air collector by using discrete w-shaped artificial roughened absorber. In: Proc. 19th National and 8th ISHMT-ASME Heat and Mass Transfer Conf. (2009).
• [8] Lanjewar A., Bhagoria J.L., Sarviya R.M.: Experimental study of augmented heat transfer and friction in solar air heater with different orientations of W-Rib roughness. Exp. Thermal Fluid Sci. 35(2011), 986–995.
• [9] Singh A.P., Varun, Siddhartha: Effect of artificial roughness on heat transfer and friction characteristics having multiple arc shaped roughness element on the absorber plate. Sol. Energy 105(2014), 479–493.
• [10] Pandey N.K., Bajpai V.K., Varun: Experimental investigation of heat transfer augmentation using multiple arcs with gap on absorber plate of solar air heater. Sol. Energy 134(2016), 314–26.
• [11] Hans V.S., Gill R.S., Singh S.: Heat transfer and friction factor correlations for a solar air heater duct roughened artificially with broken arc ribs. Exp. Therm. Fluid Sci. 80(2017), 77–89.
• [12] Gill R.S., Hans V.S., Saini J.S., Singh S.: Investigation on performance enhancement due to staggered piece in a broken arc rib roughened solar air heater duct. Renew. Energ. 104(2017), 148–162.
• [13] Saini S.K., 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. Sol. Energy 82(2008), 1118–1130.
• [14] Sahu M.K., Prasad R.K.: Investigation on optimal thermohydraulic performance of a solar air heater having arc shaped wire rib roughness on absorber plate. Int. J. Thermodyn. 19(2016), 214–224.
• [15] Sahu M.K., Prasad R.K.: Exergy based performance evaluation of solar air heater with arc-shaped wire roughened absorber plate. Renew. Energ. 96(2016), 233–243.
• [16] Sahu M.K., Prasad R.K.: Thermohydraulic performance analysis of an arc shape wire roughened solar air heater. Renew. Energ. 108(2017), 598–614.
• [17] Sahu M.K., Prasad R.K.: Entropy generation and thermodynamic analysis of solar air heaters with artificial roughness on absorber plate. Arch. Thermodyn. 38(2017), 3, 23–48.
• [18] Prasad R.K.: Thermal performance characteristics of unidirectional flow porous bed solar energy collectors for heating air. PhD thesis, IIT, Roorkee 1993.
• [19] Sahu M.K., Prasad R.K.: A review of the thermal and hydrodynamic performance of solar air heater with roughened absorber plates. J. Enhanc. Heat Transf. 23(2016), 1, 47–89.
• [20] Sahu M.K.: Thermohydraulic Performance of Solar Air Heater with Arc-Shaped Wire Roughened Absorber Plates. PhD thesis, NIT, Jamshedpur 2017.
• [21] ASHRAE standard 93–97: Method of testing to determine the thermal performance of solar collector, 1977.
• [22] Biondi P., Cicala F.L., Farina, G.: Performance analysis of solar air heaters of conventional design. Sol. Energy 41(1988), 1, 101–107.
• [23] Behura Arun K., Prasad B.N., Prasad L.: Heat transfer, friction factor and thermal performance of three sides artificially roughened solar air heaters. Sol. Energy 130 (2016), 46–59.
• [24] Rohsenow W.M., Hartnett J.P., Cho Y.I. (Eds.): Handbook of Heat Transfer. McGraw Hill, New York 1998.
• [25] Bhatti M.S., Shah R.K.: Turbulent flow convective heat transfer. In: S. Kakac, R.K. Sash, W. Aung (Eds.): Handbook of single phase convective heat transfer. John Willey & Sons, New York 1987.
• [26] Varun, Patnaik A., Saini R.P, Singal S.K, Siddhartha: Performance prediction of solar air heater having roughened duct provided with transverse and inclined ribs as artificial roughness. Renew. Energ. 34(2009), 2914–2922.
• [27] Aharwal K.R., Gandhi B.K., Saini J.S.: Heat transfer and friction characteristics of solar air heater ducts having integral inclined discrete ribs on absorber plate. Int. J. Heat Mass Tran. 52(2009), 5970–5977.
• [28] Singh S., Chander S., Saini J.S.: Exergy based analysis of solar air heater having discrete V-down rib roughness on absorber plate. Energy 37(2012), 749–758.
• [29] Singh S., Chander S., Saini J.S.: Thermal and effective efficiency based analysis of discrete V-down rib-roughened solar air heaters. J. Renew. Sustain. Ener. 3(2011), 023107.
• [30] Kline S.J., McClintock F.A.: Describing uncertainties in single sample experiments. Mech. Eng. 75(1953), 3–8.
• [31] Prasad B.N.: Thermal performance of artificially roughened solar air heaters. Sol. Energy 91(2013), 59–67.
• [32] Sahu M.K., Prasad R.K.: Second law optimization and parametric study of a solar air heater having artificially roughened absorber plate. Arch. Thermodyn. 40(2019), 2, 107–135.
• [33] Sahu M.K., Sharma M., Matheswaran M.M., Maitra K.: On the use of longitudinal fins to enhance the performance in rectangular duct of solar air heaters – a review. J. Sol. Energy Eng. 141(2019), 1–16.