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Compact Solar Air Heater: A Review

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Advances in Fluid and Thermal Engineering

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

Abstract

In this review work, a theoretical study of solar air heater is carried out by considering compact heat exchanger criteria into account. The present investigation comprises different performance parameters for a compact solar air heater. In this review work, Reynolds number is the only variable parameter which varies from 4000 to 18000. Stanton number (St), Stanton number ratio (St/St0), Colburn factor (j), and area goodness factor (j/f) are considered as performance parameters. Stanton number ratio (St/St0) is maximum for multi-V-shaped ribs with gaps. Colburn factor (j) value is highest for multi-V-shaped ribs with gaps. In the present investigation, goodness factor (j/f) is highest for circular protrusions organized in angular arc form. This study is beneficial for the researchers to conduct the experimental and theoretical investigation in order to search out the new roughness geometries to design compact solar air heater.

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Abbreviations

C p :

Specific heat (J/kg-K)

Dh or D:

Equivalent hydraulic diameter of duct (m)

e :

Rib height (m)

e/Dh or e/D:

Relative roughness height

f :

Friction factor

St r :

Stanton number of roughened duct

St s :

Stanton number of smooth duct

J :

Colburn factor (kg/s-m2)

h :

Convective heat transfer coefficient (W/m2-K)

Nu :

Nusselt number

P :

Pitch of rib

P/e:

Relative roughness pitch

Re :

Reynolds number

W :

Width of absorber plate

W/w:

Relative roughness width (W/m2-K)

W/H:

Duct aspect ratio

Gd/Lv:

Relative gap distance

k :

Thermal conductivity of air W/m2-K

j/f:

Area goodness factor

g/p:

Gap to pitch ratio

α :

Flow angle of attack (°)

Ï• :

Chamfer angle (°)

Pr :

Prandtl number

g/e:

Relative gap width

References

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Author information

Authors and Affiliations

  1. Department of Thermal Engineering, Faculty of Technology, UTU, Dehradun, India

    Vijay Singh Bisht

  2. Department of Mechanical Engineering, DIT University, Dehradun, India

    Anil Kumar Patil

  3. Department of Mechanical Engineering, BTKIT, Dwarahat, India

    Anirudh Gupta

Authors
  1. Vijay Singh Bisht
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  2. Anil Kumar Patil
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  3. Anirudh Gupta
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Corresponding author

Correspondence to Vijay Singh Bisht .

Editor information

Editors and Affiliations

  1. Oak Ridge Institute for Science and Education, Oak Ridge, TN, USA

    Pankaj Saha

  2. Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi, Delhi, India

    P.M.V. Subbarao

  3. Department of Mechanical Engineering, Amity School of Engineering and Technology, Amity University Uttar Pradesh, NOIDA, Uttar Pradesh, India

    Basant Singh Sikarwar

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Bisht, V.S., Patil, A.K., Gupta, A. (2019). Compact Solar Air Heater: A Review. In: Saha, P., Subbarao, P., Sikarwar, B. (eds) Advances in Fluid and Thermal Engineering. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-6416-7_26

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  • DOI: https://doi.org/10.1007/978-981-13-6416-7_26

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-13-6415-0

  • Online ISBN: 978-981-13-6416-7

  • eBook Packages: EngineeringEngineering (R0)

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