THERMAL SCIENCE

International Scientific Journal

EXPERIMENTAL INVESTIGATION ON OVERALL THERMAL PERFORMANCE OF FLUID FLOW IN A RECTANGULAR CHANNEL WITH DISCRETE V-PATTERN BAFFLE

ABSTRACT
This work presents the results of an experimental study of thermo-hydraulic performance of rectangular channel having discrete V-pattern baffle attached on the broad wall. Measurements have been carried out for the aspect channel ratio of 10, Reynolds number from 3000 to 21000, relative baffle height value of 0.50, relative baffle pitch value of 1.5, relative gap width value of 1.0, flow attack angle value of 60°, relative discrete distance values of 0.26 to 0.83. The heat transfer and friction factor data obtained were compared with the data obtained from a smooth wall channel under similar operating conditions. In comparison to the smooth wall channel the discrete V-pattern baffle channel enhanced the Nusselt number and friction factor by 3.89 and 6.08 times, respectively. The overall thermal performance parameter is found superior for the relative discrete distance of 0.67. Discrete V-pattern baffle roughness shape has also been shown to be overall thermal performance higher in comparison to other continuous (without discrete) V-pattern baffle shape rectangular channel.
KEYWORDS
PAPER SUBMITTED: 2015-12-06
PAPER REVISED: 2016-05-25
PAPER ACCEPTED: 2016-05-26
PUBLISHED ONLINE: 2016-05-30
DOI REFERENCE: https://doi.org/10.2298/TSCI151206125K
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE Issue 1, PAGES [183 - 191]
REFERENCES
  1. Kumar, A., Kim, M.H., Thermo-hydraulic Performance of Rectangular Ducts with Different 259 Multiple V-Rib Roughness Shapes: A Comprehensive Review and Comparative Study, 260 Renewable and Sustainable Energy Reviews, 54 (2016), pp.635-652. 261
  2. Kumar, R., et al., Experimental investigation of effect of flow attack angle on thermohydraulic 262 performance of air flow in a rectangular channel with discrete V-pattern baffle on the heated 263 plate, Advances in Mechanical Engineering, 8 (2016), pp.1-12.
  3. Kumar, A., Kim, MH., Convective Heat Transfer Enhancement in Solar Air Channels, Applied 265 Thermal Engineering, 89 (2015),pp. 239-261.
  4. Sethi, M., et al., Correlations For Solar Air Heater Duct with Dimpled Shape Roughness 267 Elements on Absorber Plate, Solar Energy, 86 (2012), pp. 2852-2861.
  5. Kumar, A., et al., Experimental Investigation on Heat Transfer and Fluid Flow Characteristics 269 of Air Flow in a Rectangular Duct with Multi V-Shaped Rib with Gap Roughness on the 270 Heated Plate, Solar Energy, 86 (2012), 1733-1749.
  6. Yeh, H.M., Chou, W., Efficiency of Solar Air Heaters with Baffles, Energy, 16 (1991), pp. 272 983-987.
  7. Park, J.S., et al., Heat Transfer Performance Comparisons of Five Different Rectangular 274 Channels with Parallel Angled Ribs, International Journal of Heat and Mass Transfer, 35 275 (1992), pp. 2891-2903.
  8. Liu, J., et al., Heat Transfer Characteristics in Steam-Cooled Rectangular Channels with Two 277 Opposite Rib-Roughened Walls, Applied Thermal Engineering, 50 (2013), pp.104-111.
  9. Maurer, M., et al., An Experimental and Numerical Study of Heat Transfer and Pressure 279 Losses of V and W Shaped Ribs at High Reynolds Number, Proceeding ASME Turbo Expo, 4 280 (2007), pp. 219-228.
  10. Sriromreun, P., et al., Experimental and Numerical Study on Heat Transfer Enhancement in a 282 Channel with Z-Shaped Baffles, International Communication of Heat and Mass Transfer, 39 283 (2012), pp. 945-952.
  11. Mousavi, S.S., Hooman, K., Heat and Fluid Flow in Entrance Region of a Channel with 285 Staggered Baffles, Energy Conversion and Management, 47 (2006), pp. 2011-2019.
  12. Sara, O.N., Thermal Performance Analysis for Solid and Perforated Blocks on a Flat Surface 287 in a Duct Flow, Energy Conversion and Management, 41 (2000), pp.1019-1028.
  13. Hwang, J.J., Liou, T.M., Heat Transfer in a Rectangular Channel with Perforated Turbulence 289 Promoters using Holographic Interferometry Measurement, International Journal of Heat 290 and Mass Transfer, 38 (1995), pp. 3197-3207.
  14. Chamoli, S., Thakur, N.S., Correlations For Solar Air Heater Duct with V-Shaped Perforated 292 Baffles as Roughness Elements on Absorber Plate. International Journal of Sustainable 293 Energy, 85 (2013), pp. 73- 81
  15. Alam, T., et al., Experimental Investigation of Thermo Hydraulic Performance of a 295 Rectangular Solar Air Heater Duct Equipped with V-Shaped Perforated Blocks, Advanced in 296 Mechanical Engineering, 94 (2014) pp. 83-13.
  16. ASHRAE Standard 93, Method of Testing to Determine the Thermal Performance of Solar 298 Collectors. Atlanta, GA: American Society of Heating, Refrigeration and Air Conditioning 299 Engineers, 2003.

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