0
Research Papers

Heat Transfer Augmentation Using an Innovative Helicoidal Finned Absorber Plate in a Solar Air Heater—A Numerical Study

[+] Author and Article Information
Shantanu Purohit

Department of Mechanical and
Manufacturing Engineering,
Manipal Institute of Technology,
Manipal Academy of Higher Education,
Manipal 576 104, Karnataka, India
e-mail: shantanupurohit1212@gmail.com

N. Madhwesh

Department of Mechanical and Manufacturing
Engineering,
Manipal Institute of Technology,
Manipal Academy of Higher Education,
Manipal 576 104, Karnataka, India
e-mail: madhwesh.n@manipal.edu

K. Vasudeva Karanth

Department of Mechanical and Manufacturing
Engineering,
Manipal Institute of Technology,
Manipal Academy of Higher Education,
Manipal 576 104, Karnataka, India
e-mail: kv.karanth@manipal.edu

N. Yagnesh Sharma

Department of Mechanical and Manufacturing
Engineering,
Manipal Institute of Technology,
Manipal Academy of Higher Education,
Manipal 576 104, Karnataka, India
e-mail: yagnesh.sharma@manipal.edu

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING: INCLUDING WIND ENERGY AND BUILDING ENERGY CONSERVATION. Manuscript received May 8, 2018; final manuscript received November 14, 2018; published online December 24, 2018. Assoc. Editor: M. Keith Sharp.

J. Sol. Energy Eng 141(3), 031016 (Dec 24, 2018) (10 pages) Paper No: SOL-18-1205; doi: 10.1115/1.4042071 History: Received May 08, 2018; Revised November 14, 2018

This study presents an innovative idea to augment heat transfer to an air heater using helicoidal finned arrangement. A parametric analysis of the helicoidal shaped fin geometry is considered with helicoidal pitch ratio of 0.1666–0.3, fin diameter ratio of 1.75–2. For the placement of the fin beneath the absorber plate, longitudinal pitch ratio ranging from 0.0416 to 0.1666 are used. The flow Reynolds number used for the study ranges from 4800 to 25,000. The effects of helicoidal pitch ratio, wire diameter ratio and longitudinal pitch ratio on Nusselt number and friction factor have been discussed. It is seen from the analysis that there is a significant improvement in Nusselt number for the case of helicoidal fin of wire diameter ratio of 1 when compared to base model as well as straight fin model for the operating range of Reynolds number. It is also observed from the analysis that for the helicoidal fin configuration of helicoidal pitch ratio of 0.2333, friction factor appears to be moderate. Flow and roughness parameters for roughened solar air heater have been optimized using thermal-hydraulic enhancement factor (THEF). The study reveals that by the use of helicoidal fins, maximum enhancement in the Nusselt number is found to be 2.21 times when compared to the base model for longitudinal pitch ratio of 0.0416, helicoidal pitch ratio of 0.166 for a fixed wire diameter. The improvement obtained in performance corresponding to increased Nusselt number establishes the efficacy the helicoidal fin design for the absorber plate.

Copyright © 2019 by ASME
Your Session has timed out. Please sign back in to continue.

References

Yadav, A. S. , and Bhagoria, J. L. , 2014, “ A CFD Based Thermo-Hydraulic Performance Analysis of an Artificially Roughened Solar Air Heater Having Equilateral Triangular Sectioned Rib Roughness on the Absorber Plate,” Int. J. Heat Mass Transfer, 70, pp. 1016–1039. [CrossRef]
Yadav, A. S. , and Bhagoria, J. L. , 2014, “ A Numerical Investigation of Square Sectioned Transverse Rib Roughened Solar Air Heater,” Int. J. Therm. Sci., 79, pp. 111–131. [CrossRef]
Jin, D. , Zhang, M. , Wang, P. , and Xu, S. , 2015, “ Numerical Investigation of Heat Transfer and Fluid Flow in a Solar Air Heater Duct With Multi V-Shaped Ribs on the Absorber Plate,” Energy, 89, pp. 178–190. [CrossRef]
Chaube, A. , Sahoo, P. K. , and Solanki, S. C. , 2006, “ Analysis of Heat Transfer Augmentation and Flow Characteristics Due to Rib Roughness Over Absorber Plate of a Solar Air Heater,” Renewable Energy, 31(3), pp. 317–331. [CrossRef]
Kumar, S. , and Saini, R. P. , 2009, “ CFD Based Performance Analysis of a Solar Air Heater Duct Provided With Artificial Roughness,” Renewable Energy, 34(5), pp. 1285–1291. [CrossRef]
Promvonge, P. , 2010, “ Heat Transfer and Pressure Drop in a Channel With Multiple 60° V-Baffles,” Int. Commun. Heat Mass Transfer, 37, pp. 835–840. [CrossRef]
Karmare, S. V. , and Tikekar, A. N. , 2010, “ Analysis of Fluid Flow and Heat Transfer in a Rib Grit Roughened Surface Solar Air Heater Using CFD,” Sol. Energy, 84(3), pp. 409–417. [CrossRef]
Gandhi, B. K. , and Singh, M. K. , 2010, “ Experimental and Numerical Investigations on Flow Through Wedge Shape Rib-Roughened Duct,” J. Inst. Eng. (India): Mech. Eng. Div., 90, pp. 13–18. https://www.ieindia.org/WebUI/IEI-Publication.aspx
Yadav, A. S. , Samant, T. S. , and Varshney, L. , 2015, “ A CFD Based Analysis of Solar Air Heater Having V-Shaped Perforated Blocks on Absorber Plate,” Int. Res. J. Eng. Technol., 2, pp. 822–829. https://www.irjet.net/archives/V2/i2/Irjet-v2i2150.pdf
Kumar, A. , and Kim, M.-H. , 2016, “ Thermal Hydraulic Performance in a Solar Air Heater Channel With Multi V-Type Perforated Baffles,” Energies, 9(7), p. 564. [CrossRef]
Gawande, V. B. , Dhoble, A. S. , Zodpe, D. B. , and Chamoli, S. , 2016, “ Experimental and CFD Investigation of Convection Heat Transfer in Solar Air Heater With Reverse L-Shaped Ribs,” Sol. Energy, 131, pp. 275–295. [CrossRef]
Deo, N. S. , Chander, S. , and Saini, J. S. , 2016, “ Performance Analysis of Solar Air Heater Duct Roughened With Multi-Gap V-Down Ribs Combined With Staggered Ribs,” Renewable Energy, 91, pp. 484–500. [CrossRef]
Skullong, S. , Promvonge, P. , Thianpong, C. , and Pimsarn, N. , 2016, “ Thermal Performance in Solar Air Heater Channel With Combined Wavy-Groove and Perforated Delta Wing Vortex Generators,” Appl. Therm. Eng., 100, pp. 611–620. [CrossRef]
Alam, T. , and Kim, M.-H. , 2016, “ Numerical Study on Thermal Hydraulic Performance Improvement in Solar Air Heater Duct With Semi Ellipse Shaped Obstacles,” Energy, 112, pp. 588–598. [CrossRef]
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,” Renewable Energy, 104, pp. 148–162. [CrossRef]
Omojaro, A. P. , and Aldabbagh, L. B. Y. , 2010, “ Experimental Performance of Single and Double Pass Solar Air Heater With Fins and Steel Wire Mesh as Absorber,” Appl. Energy, 87(12), pp. 3759–3765. [CrossRef]
El-Sebaii, A. A. , Aboul-Enein, S. , Ramadan, M. R. I. , and El-Bialy, E. , 2007, “ Year Round Performance of Double Pass Solar Air Heater With Packed Bed,” Energy Convers. Manage., 48(3), pp. 990–1003. [CrossRef]
Priyam, A. , and Chand, P. , 2016, “ Thermal and Thermohydraulic Performance of Wavy Finned Absorber Solar Air Heater,” Sol. Energy, 130, pp. 250–259. [CrossRef]
Manjunath, M. S. , Vasudeva Karanth, K. , and Yagnesh Sharma, N. , 2017, “ Numerical Analysis of the Influence of Spherical Turbulence Generators on Heat Transfer Enhancement of Flat Plate Solar Air Heater,” Energy, 121, pp. 616–630. [CrossRef]
ASHRAE Standard, 1972, “ Method of Testing to Determine the Thermal Performance of Solar Collector,” American Society of Heating, Refrigeration and Air Conditioning Engineers, New York, pp. 93–97.
Bhamjee, M. , Nurick, A. , and Madyira, D. M. , 2013, “ An Experimentally Validated Mathematical and CFD Model of a Supply Air Window: Forced and Natural Flow,” Energy Build., 57, pp. 289–301. [CrossRef]
Webb, R. L. , and Eckert, E. R. G. , 1972, “ Application of Rough Surface to Heat Exchanger Design,” Int. J. Heat Mass Transfer, 15(9), pp. 1647–1658. [CrossRef]

Figures

Grahic Jump Location
Fig. 5

Mesh of cut section of helicoidal fin and test section

Grahic Jump Location
Fig. 4

Arrangement of helicoidal fin on an absorber plate

Grahic Jump Location
Fig. 3

(a) Fin arrangement below the absorber plate and (b) inverted view of absorber plate with fins

Grahic Jump Location
Fig. 2

(a) Line diagram of helicoidal fin and (b) sectional view of A–A

Grahic Jump Location
Fig. 1

Geometric details of solar air heater (dimensions in mm) [20]

Grahic Jump Location
Fig. 7

Verification of CFD results with empirical Dittus-Boelter correlation for a smooth channel

Grahic Jump Location
Fig. 6

Grid sensitivity test results

Grahic Jump Location
Fig. 10

Effect of wire diameter ratio on thermal performance

Grahic Jump Location
Fig. 11

Effect of helicoidal pitch ratio on Nusselt number for various configuration

Grahic Jump Location
Fig. 12

Velocity contours for different fin configuration

Grahic Jump Location
Fig. 13

Particle pathline plots for fin configurations with and without helicoidal geometry

Grahic Jump Location
Fig. 14

Contour plot of turbulent kinetic energy for various fin configurations

Grahic Jump Location
Fig. 16

Contour plots of pressure drop across various fin configurations

Grahic Jump Location
Fig. 17

Effect of longitudinal pitch ratio (P/L) on friction factor

Grahic Jump Location
Fig. 15

Effect of helicoidal pitch ratio on friction factor

Grahic Jump Location
Fig. 18

Variation of THEF with Reynolds number for varying helicoidal pitch ratio (p/l) (a) and longitudinal pitch ratio (P/L) (b)

Grahic Jump Location
Fig. 8

Effect of flow Reynolds number on Nusselt number for various configurations

Grahic Jump Location
Fig. 9

Effect of longitudinal pitch ratio on Nusselt number

Tables

Errata

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In