Numerical investigation on heat transfer enhancement of solar air heater using sinusoidal corrugations on absorber plate

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Abstract

This paper presents the effect of sinusoidal profiled absorber plate on augmented heat transfer and corresponding thermo-hydraulic performance of solar air heater using three dimensional Computational Fluid Dynamics (CFD) simulation for the flow Reynolds number ranging between 4,000 and 24,000. The effect of variation of design parameters of corrugated absorber plate such as the non-dimensional wavelength and aspect ratio on the thermo-hydraulic performance is brought out. The aspect ratio is varied between 1.5 and 4.0 while the normalized wavelength is varied between 1.0 and 6.0. The study reveals that the presence of sinusoidal corrugations provides increased flow disturbances leading to considerable enhancement in heat transfer. It is found that the use of lower values of non-dimensional wavelength and aspect ratio leads to higher thermal efficiency. The average increase in thermal efficiency is about 12.5% as compared to the base model for the configuration having an aspect ratio of 1.5 and non-dimensional wavelength of 1.0. In terms of effective efficiency, the sinusoidal corrugations are found to be highly effective at lower flow rate conditions and generally have a relatively narrow useful operating range of flow Reynolds number. The aspect ratio and non-dimensional wavelength have significant influence on the effective efficiency. The pumping power requirement is generally found to be relatively higher as compared to the base model owing to increased flow obstruction by the corrugations.

Original languageEnglish
Pages (from-to)219-228
Number of pages10
JournalInternational Journal of Mechanical Sciences
Volume138-139
DOIs
Publication statusPublished - 01-04-2018

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heaters
aspect ratio
Aspect ratio
absorbers
heat transfer
Heat transfer
Wavelength
augmentation
air
Air
thermodynamic efficiency
wavelengths
hydraulics
Reynolds number
Hydraulics
computational fluid dynamics
Computational fluid dynamics
pumping
disturbances
flow velocity

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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title = "Numerical investigation on heat transfer enhancement of solar air heater using sinusoidal corrugations on absorber plate",
abstract = "This paper presents the effect of sinusoidal profiled absorber plate on augmented heat transfer and corresponding thermo-hydraulic performance of solar air heater using three dimensional Computational Fluid Dynamics (CFD) simulation for the flow Reynolds number ranging between 4,000 and 24,000. The effect of variation of design parameters of corrugated absorber plate such as the non-dimensional wavelength and aspect ratio on the thermo-hydraulic performance is brought out. The aspect ratio is varied between 1.5 and 4.0 while the normalized wavelength is varied between 1.0 and 6.0. The study reveals that the presence of sinusoidal corrugations provides increased flow disturbances leading to considerable enhancement in heat transfer. It is found that the use of lower values of non-dimensional wavelength and aspect ratio leads to higher thermal efficiency. The average increase in thermal efficiency is about 12.5{\%} as compared to the base model for the configuration having an aspect ratio of 1.5 and non-dimensional wavelength of 1.0. In terms of effective efficiency, the sinusoidal corrugations are found to be highly effective at lower flow rate conditions and generally have a relatively narrow useful operating range of flow Reynolds number. The aspect ratio and non-dimensional wavelength have significant influence on the effective efficiency. The pumping power requirement is generally found to be relatively higher as compared to the base model owing to increased flow obstruction by the corrugations.",
author = "Manjunath, {M. S.} and Karanth, {K. Vasudeva} and Sharma, {N. Yagnesh}",
year = "2018",
month = "4",
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doi = "10.1016/j.ijmecsci.2018.01.037",
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AU - Manjunath, M. S.

AU - Karanth, K. Vasudeva

AU - Sharma, N. Yagnesh

PY - 2018/4/1

Y1 - 2018/4/1

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AB - This paper presents the effect of sinusoidal profiled absorber plate on augmented heat transfer and corresponding thermo-hydraulic performance of solar air heater using three dimensional Computational Fluid Dynamics (CFD) simulation for the flow Reynolds number ranging between 4,000 and 24,000. The effect of variation of design parameters of corrugated absorber plate such as the non-dimensional wavelength and aspect ratio on the thermo-hydraulic performance is brought out. The aspect ratio is varied between 1.5 and 4.0 while the normalized wavelength is varied between 1.0 and 6.0. The study reveals that the presence of sinusoidal corrugations provides increased flow disturbances leading to considerable enhancement in heat transfer. It is found that the use of lower values of non-dimensional wavelength and aspect ratio leads to higher thermal efficiency. The average increase in thermal efficiency is about 12.5% as compared to the base model for the configuration having an aspect ratio of 1.5 and non-dimensional wavelength of 1.0. In terms of effective efficiency, the sinusoidal corrugations are found to be highly effective at lower flow rate conditions and generally have a relatively narrow useful operating range of flow Reynolds number. The aspect ratio and non-dimensional wavelength have significant influence on the effective efficiency. The pumping power requirement is generally found to be relatively higher as compared to the base model owing to increased flow obstruction by the corrugations.

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