Abstract
An effort is made to study the performance of a solar air heater having the absorber surface roughened by providing staggered, twisted, and V-shaped ribs roughness. The liquid crystal thermography technique is applied to get the Nu distribution over the surface. Experimentation is done for Reynolds number ranges from 3000 to 21,000, relative roughness to pitch ratio (P/e) from 7–11 and relative staggered distance (d/e) of 2–6, for the fixed angle of attack (α), relative twist length (y/e), and relative roughness length (S/e). It is found that the maximum Nusselt number and friction factor augmentation are 3.43 and 2.57 times than that of the smooth duct. The maximum thermo-hydraulic performance (THP) value obtained is 2.69 for the P/e of 9 and d/e of 4. It can be inferred that staggered twisted V-shaped rib roughness helps to get the enhanced Nu with minimum friction penalty.
References
1.
Goswami
, D. Y.
, 2022
, Principles of Solar Engineering
, CRC Press
, Boca Raton, FL
.2.
Prasad
, B. N.
, and Saini
, J. S.
, 1988
, “Effect of Artificial Roughness on Heat Transfer and Friction Factor in a Solar Air Heater
,” Sol. Energy
, 41
(6
), pp. 555
–560
. 3.
Kumar
, D.
, Choudhury
, R.
, and Layek
, A.
, 2022
, “Application of Liquid Crystal Thermography for Temperature Measurement of the Absorber Plate of Solar Air Heater
,” Mater. Today Proc.
, 59
(1
), pp. 605
–611
. 4.
Prasad
, K.
, and Mullick
, S. C.
, 1983
, “Heat Transfer Characteristics of a Solar Air Heater Used for Drying Purposes
,” Appl. Energy
, 13
(2
), pp. 83
–93
. 5.
Kumar
, S.
, and Tariq
, A.
, 2017
, “Steady State Experimental Investigation of Thermal Contact Conductance Between Curvilinear Contacts Using Liquid Crystal Thermography
,” Int. J. Therm. Sci.
, 118
, pp. 53
–68
. 6.
Cooper
, T. E.
, Field
, R. J.
, and Meyer
, J. F.
, 1975
, “Liquid Crystal Thermography and Its Application to the Study of Convective Heat Transfer
,” ASME J. Heat Transfer-Trans. ASME
, 97
(3
), pp. 442
–450
. 7.
Stasiek
, J.
, Wierzbowski
, M.
, Klosowicz
, S.
, Zmija
, J.
, and Collins
, M. W.
, 2002
, “Liquid Crystals Thermography for Technical and Biomedical Application
,” Des. Nat.
, 57
(3
), pp. 347
–354
. 8.
Ireland
, P. T.
, and Jones
, T. V.
, 2000
, “Liquid Crystal Measurements of Heat Transfer and Surface Shear Stress
,” Meas. Sci. Technol.
, 11
(7
), pp. 969
–986
. 9.
Camci
, C.
, Kim
, K.
, and Hippensteele
, S. A.
, 1992
, “A New Hue Capturing Technique for the Quantitative Interpretation of Liquid Crystal Images Used in Convective Heat Transfer Studies
,” ASME J. Turbomach.
, 114
(4
), pp. 765
–775
. 10.
Cavallero
, D.
, and Tanda
, G.
, 2002
, “An Experimental Investigation of Forced Convection Heat Transfer in Channels With Rib Turbulators by Means of Liquid Crystal Thermography
,” Exp. Therm. Fluid Sci.
, 26
(2–4
), pp. 115
–121
. 11.
Maithani
, R.
, Kumar
, A.
, Gholamali Zadeh
, P.
, Safaei
, M. R.
, and Gholamalizadeh
, E.
, 2020
, “Empirical Correlations Development for Heat Transfer and Friction Factor of a Solar Rectangular Air Passage With Spherical-Shaped Turbulence Promoters
,” J. Therm. Anal. Calorim.
, 139
(2
), pp. 1195
–1212
. 12.
Wang
, L.
, and Sundén
, B.
, 2005
, “Experimental Investigation of Local Heat Transfer in a Square Duct With Continuous and Truncated Ribs
,” Exp. Heat Transfer
, 18
(3
), pp. 179
–197
. 13.
Ali
, M. S.
, Tariq
, A.
, and Gandhi
, B. K.
, 2013
, “Flow and Heat Transfer Investigation Behind Trapezoidal Rib Using PIV and LCT Measurements
,” Exp. Fluids
, 54
(5
), p. 1520
. 14.
Kaewchoothong
, N.
, Maliwan
, K.
, Takeishi
, K.
, and Nuntadusit
, C.
, 2017
, “Effect of Inclined Ribs on Heat Transfer Coefficient in Stationary Square Channel
,” Theor. Appl. Mech. Lett.
, 7
(6
), pp. 344
–350
. 15.
Tanda
, G.
, 2001
, “Heat Transfer and Pressure Drop in a Rectangular Channel With Diamond-Shaped Elements
,” Int. J. Heat Mass Transfer
, 44
(18
), pp. 3529
–3541
. 16.
Kumar
, A.
, and Layek
, A.
, 2019
, “Nusselt Number and Fluid Flow Analysis of Solar Air Heater Having Transverse Circular Rib Roughness on Absorber Plate Using LCT and Computational Technique
,” Therm. Sci. Eng. Prog.
, 14
, p. 100398
. 17.
Kumar
, A.
, and Layek
, A.
, 2018
, “Nusselt Number-Friction Characteristic for a Twisted Rib Roughened Rectangular Duct Using Liquid Crystal Thermography
,” Exp. Therm. Fluid Sci.
, 97
, pp. 205
–217
. 18.
Kumar
, A.
, and Layek
, A.
, 2018
, “Thermo-Hydraulic Performance of Solar Air Heater Having Twisted Rib Over the Absorber Plate
,” Int. J. Therm. Sci.
, 133
, pp. 181
–195
. 19.
Gharai
, S. K.
, and Layek
, A.
, 2018
, “Heat Transfer Measurement in Rectangular Channel With Detach Ribs by Liquid Crystal Thermography
,” Int. J. Heat Technol.
, 36
(4
), pp. 1502
–1509
. 20.
Kumar
, A.
, and Layek
, A.
, 2020
, “Nusselt Number and Friction Factor Correlation of Solar Air Heater Having Winglet Type Vortex Generator Over Absorber Plate
,” Sol. Energy
, 205
, pp. 334
–348
. 21.
Kumar
, A.
, and Layek
, A.
, 2020
, “Nusselt Number and Friction Characteristics of a Solar Air Heater That Has a Winglet Type Vortex Generator in the Absorber Surface
,” Exp. Therm. Fluid Sci.
, 119
, p. 110204
. 22.
Kumar
, A.
, and Layek
, A.
, 2022
, “Evaluation of the Performance Analysis of an Improved Solar Air Heater With Winglet Shaped Ribs
,” Exp. Heat Transfer
, 35
(3
), pp. 239
–257
. 23.
Gill
, R. S.
, Hans
, V. S.
, Saini
, J. S.
, and Singh
, S.
, 2017
, “Investigation on Performance Enhancement Due to Staggered Piece in a Broken Arc Rib Roughened Solar Air Heater Duct
,” Renewble Energy
, 104
, pp. 148
–162
. 24.
Kabeel
, A. E.
, Khalil
, A.
, Shalaby
, S. M.
, and Zayed
, M. E.
, 2016
, “Investigation of the Thermal Performances of Flat, Finned, and V-Corrugated Plate Solar Air Heaters
,” ASME J. Sol. Energy Eng.
, 138
(5
), p. 051004
. 25.
Han
, J. C.
, and Zhang
, Y. M.
, 1992
, “High Performance Heat Transfer Ducts With Parallel Broken and V-Shaped Broken Ribs
,” Int. J. Heat Mass Transfer
, 35
(2
), pp. 513
–523
. 26.
Patil
, A. K.
, Saini
, J. S.
, and Kumar
, K.
, 2015
, “Experimental Investigation of Enhanced Heat Transfer and Pressure Drop in a Solar Air Heater Duct With Discretized Broken V-Rib Roughness
,” ASME J. Sol. Energy Eng.
, 137
(2
), p. 021013
. 27.
Karwa
, R.
, 2003
, “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
(2
), pp. 241
–250
. 28.
Deo
, N. S.
, Chander
, S.
, and Saini
, J. S.
, 2016
, “Performance Analysis of Solar Air Heater Duct Roughened With Multigap V-Down Ribs Combined With Staggered Ribs
,” Renewble Energy
, 91
, pp. 484
–500
. 29.
Kumar
, D.
, and Layek
, A.
, 2021
, “Parametric Analysis of Artificial Rib Roughness for the Enhancement of Thermohydraulic Performance of Solar Air Heater: A Review
,” Mater. Today Proc.
, 57
(3
), pp. 1127
–1135
. 30.
Coleman
, H. W.
, and Steele
, W. G.
, 2018
, Experimentation, Validation, and Uncertainty Analysis for Engineers
, Wiley
, UK
.31.
Kumar
, D.
, Kumar
, A.
, and Layek
, A.
, 2021
, Theoretical, Computational, and Experimental Solutions to Thermo-Fluid Systems, Lecture Notes in Mechanical Engineering
, 1st ed., M.
Palanisamy
, V.
Ramalingam
, and M.
Sivalingam
, eds., Springer
, Singapore
, pp. 335
–342
.32.
Webb
, R. L.
, Eckert
, E. R. G.
, and Goldstein
, R. J.
, 1972
, “Generalized Heat Transfer and Friction Correlations for Tubes With Repeated-Rib Roughness
,” Int. J. Heat Mass Transfer
, 15
(1
), pp. 180
–184
. 33.
Ebrahim Momin
, A.-M.
, Saini
, J.
, and Solanki
, S.
, 2002
, “Heat Transfer and Friction in Solar Air Heater Duct With V-Shaped Rib Roughness on Absorber Plate
,” Int. J. Heat Mass Transfer
, 45
(16
), pp. 3383
–3396
. 34.
Promvonge
, P.
, Khanoknaiyakarn
, C.
, Kwankaomeng
, S.
, and Thianpong
, C.
, 2011
, “Thermal Behavior in Solar Air Heater Channel Fitted With Combined Rib and Delta-Winglet
,” Int. Commun. Heat Mass Transfer
, 38
(6
), pp. 749
–756
. 35.
Singh
, S.
, Chander
, S.
, and Saini
, J. S.
, 2012
, “Investigations on Thermo-Hydraulic Performance Due to Flow-Attack-Angle in V-Down Rib With Gap in a Rectangular Duct of Solar Air Heater
,” Appl. Energy
, 97
, pp. 907
–912
. 36.
Alam
, T.
, Saini
, R. P.
, and Saini
, J. S.
, 2014
, “Experimental Investigation on Heat Transfer Enhancement Due to V-Shaped Perforated Blocks in a Rectangular Duct of Solar Air Heater
,” Energy Convers. Manage.
, 81
, pp. 374
–383
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