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Commenced in January 2007 Frequency: Monthly Edition: International Publications Count: 29414


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9998927
Enhancement of Heat Transfer Rate in a Solar Flat Plate Collector Using Twisted Tapes and Wire Coiled Turbulators
Abstract:
Effects of insertion of coiled wire in juxtaposition with twisted tapes on heat transfer rate and solar radiation without disturbing the flow inside the riser tubes in a solar flat plate collector is experimentally reconnoitered in this present work. The wire coil used as a turbulator is placed inside the riser tube while the twisted tape is inserted into the wire coil to create a continuous swirling flow along the tube wall. The results of the heat transfer have been compared well with the available results. The heat transfer rate in the collector has been found to be increased by 18% to 70%. Solar water heaters having inserts in the flow tubes perform better than the conventional plain ones. It has been observed that heat losses are reduced consequently increasing the thermal performance about 30% over the plain water heaters under the same operating conditions. The effect of twisted tape with wire coils, flow Reynolds number, and the intensity of solar radiation on the thermal performance of the solar water heater has been presented. Effects of insertion of coiled wire in juxtaposition with twisted tapes on heat transfer rate and solar radiation without disturbing the flow inside the riser tubes in a solar flat plate collector is experimentally reconnoitered in this present work. The wire coil used as a turbulator is placed inside the riser tube while the twisted tape is inserted into the wire coil to create a continuous swirling flow along the tube wall. The results of the heat transfer have been compared well with the available results. The heat transfer rate in the collector has been found to be increased by 18% to 70%. Solar water heaters having inserts in the flow tubes perform better than the conventional plain ones. It has been observed that heat losses are reduced consequently increasing the thermal performance about 30% over the plain water heaters under the same operating conditions. The effect of twisted tape with wire coils, flow Reynolds number, and the intensity of solar radiation on the thermal performance of the solar water heater has been presented.
Digital Object Identifier (DOI):

References:

[1] Dewan A , Mahanta P, Raju K S, Kumar P S, "Review of passive heat transfer augmentation techniques, J Power Energy 2004:509-525.
[2] Shyoji Y, Sato K, Oliver DR, "Heat transfer enhancement in round tubes using coiled wire : influence of length and segmentation” Heat transfer Asian Res 2003 32(2) 99-107
[3] Garcia A, Vincete P G, Viedma A "Experimental study of heat transfer enhancement with wire coil inserts in laminar-transient-turbulent regimes at different Prandtl numbers” International journal of heat and mass transfer 2005:48 4640-4651
[4] Uttawar S B, Raja Rao M, "Augmentation of laminar flow heat transfer in tubes by means of coiled wire inserts” Trans ASME 1985:107 930-935
[5] Chiou JP "Experimental investigation of augmentation of forced convection heat transfer in a circular tube using spiral spring inserts” Trans ASME 1987 109 300-307
[6] Oliver DR, Shoji Y, "Heat transfer enhancement in round tubes using different tubes insert; non-newtonian fluids”J Chem Eng Res Des 1992:70:558-64
[7] Prasad RC, Shen J, "Performance evaluation using exergy analysis – application to wire coil inserts in forced convection heat transfer” Int Journal of heat and mass transfer 1994:37(15): 2297-303.
[8] Ravigururajan TS, Bergles AE, "Development and verification of general correlations for pressure drop and heat transfer in single phase turbulent flow in enhanced tubes” Exp Thermal Fluid Sci 1996;13:55-70.
[9] Garcia A, Solano JP, Vincente PG, Viedma A, "Enhancement of laminar and transitional flow heat transfer in tubes by means of wire coil inserts” Int Journal of heat and mass transfer 2007;50(15-16):3176-89.
[10] Yakut K, Sahin B "The effects of vortex characteristics on performance of coiled wire turbulators used for heat transfer augmentation” Appl therm energy 2004;24(16):2427-38.
[11] Ozceyhan V, "Conjugate heat transfer and thermal stress analysis of wire coiled inserted tubes that are externally heated with uniform heat flux” Energy Conserv Manage 2005;46(9-10);1543-59.
[12] Eiamsa-ard S, Thianpong C, Promvonge P "Experimental investigation of heat transfer and flow friction in a circular tube fitted with regularly twisted tape elements” Int Commun Heat mass transfer 2006;33(10):1225-33.
[13] Promvonge P "Thermal performance in circular tube fitted coiled square wires” Energy conversion management 2008 49(5) 980 – 987.
[14] Chang SW, Jan YJ, Liou JS "Turbulent heat transfer and pressure drop in a tube fitted with serrated twisted tape” Int J of thermal Sci 2007;46: 505-18.
[15] Manglik RM, Bergles AE, Heat transfer and pressure drop correlations for twisted tape inserts in isothermal tubes: Part II – Transition and turbulence flows, ASME J Heat Transfer 1993;115;890-6.
[16] Wang L, Sunden B "Performance comparison of some tube inserts” Int Commun heat mass transfer 2002;29(1):45-56.
[17] Promvonge P, Eiamsa-ard S "Heat transfer enhancement in a tube with combined conical – nozzle inserts and swirl generator” Energy Conserv Manage 2006:47(18-19); 2867-82,
[18] Promvonge P, Eiamsa-ard S "Heat transfer behaviors in a tube with combined conical ring and twisted tape insert, Int Commun heat and mass transfer 2007;34(7);849-59.
[19] Promvonge P, Eiamsa-ard S, "Heat transfer augmentation in a circular tube using V-nozzle turbulator inserts and small entry” Exp thermal fluid Sci 2007:32(1) 332-40.
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