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Performance Exploration of Impinging Jet Solar Air Heater: A Comparative Study

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Fluid Mechanics and Fluid Power, Volume 7 (FMFP 2022)

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

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Abstract

Given the imminent depletion of fossil fuels, the present scenario relies on capturing solar energy. The current study compares experimental trials of traditional SAH with alternative impinging jet ribbed solar air heater designs. The experimental investigation is investigated by increasing the Re from 4000 to 16,500 and comparing the results. The geometric parameters and jet parameters used in the investigation were e/dhd = 0.043, P/e = 10, α = 55°, Xst/dhd = 0.40, Ysp/dhd = 0.84, and dj/dhd = 0.064. The impinging jet with multi-V-shaped ribs outperformed the V-shaped ribbed SAH, with a reported thermohydraulic efficiency of 3.301 compared to 2.05 for the V-shaped ribbed SAH and 1.83 for the impinging jet flat-plate solar air. It establishes that when active and passive heat transfer approaches are coupled, heat transfer enhancement and THEP are increased. The findings were also compared to traditional SAH.

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Abbreviations

SAH:

Solar air heater

Ao:

Duct opening area, m2

Cp:

Specific heat at const. pressure, J kg−1 K−1

dhd:

Hydraulic dia. of the channel, m

Ap:

Absorber plate area, m2

Cd:

Coefficient of discharge of orifice plate

H:

Vertical channel height, m

e:

Wire roughness height, m

m:

Flow rate of air, kg s−1

L:

Length of testing section, m

P:

Roughness pitch, m

ka:

Air thermal conductivity, W m−1 K

h:

Convective coefficient, W m−2 K

Qf:

Heat exchange rate, W

ΔPd:

Pressure decrement crosswise in the testing section, N m−2

ΔPo:

Pressure decrement in orifice meter, N m−2

Tin:

Entry air temp. in the conduit, K

Tout:

Exit air temp. in plenum, K

Tmp:

Average plate temperature, K

Tmf:

Mean temp. of air, K

V:

Fluid speed, m s−1

W:

Conduit breadth, m Dimensionless factors/numbers

e/dhd:

Relative wire rib roughness height

fs:

Friction factor of conventional SAH

Nu:

Nusselt number

Nus:

Nusselt number of conventional SAH

P/e:

Relative roughness pitch

w/W:

Width ratio

Pr:

Prandtl number

Re:

Reynolds number

fp:

Friction penalty of a roughened surface

Xst/dhd:

Streamwise impinging jet pitch ratio

Yst/dhd:

Spanwise impinging jet pitch ratio

THEP:

Thermohydrodynamic efficiency parameter

α:

Attack angle

β:

Fraction of hole distance corresponding of pipe width

ρair:

The density of fluid, kg m−3

ρair:

Density of flowing air at mean temperature, kg m−3

ϑ:

Kinematic viscosity, m2 s−1

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Authors and Affiliations

  1. Mechanical Engineering Department, N.I.T, Hamirpur, India

    Amitesh Sharma, Sushant Thakur & Prashant Dhiman

  2. Mechanical Engineering Department, M.G. Government Engineering College, Jeori Shimla, H.P, India

    Amitesh Sharma & Rakesh Kumar

Authors
  1. Amitesh Sharma
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  2. Sushant Thakur
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  3. Prashant Dhiman
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  4. Rakesh Kumar
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Corresponding author

Correspondence to Amitesh Sharma .

Editor information

Editors and Affiliations

  1. Department of Mechanical and Industrial Engineering, IIT Roorkee, Roorkee, Uttarakhand, India

    Krishna Mohan Singh

  2. Department of Mechanical and Industrial Engineering, IIT Roorkee, Roorkee, Uttarakhand, India

    Sushanta Dutta

  3. Department of Mechanical and Industrial Engineering, IIT Roorkee, Roorkee, Uttarakhand, India

    Sudhakar Subudhi

  4. Department of Mechanical and Industrial Engineering, IIT Roorkee, Roorkee, Uttarakhand, India

    Nikhil Kumar Singh

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Sharma, A., Thakur, S., Dhiman, P., Kumar, R. (2024). Performance Exploration of Impinging Jet Solar Air Heater: A Comparative Study. In: Singh, K.M., Dutta, S., Subudhi, S., Singh, N.K. (eds) Fluid Mechanics and Fluid Power, Volume 7. FMFP 2022. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-99-7047-6_1

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  • DOI: https://doi.org/10.1007/978-981-99-7047-6_1

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  • Online ISBN: 978-981-99-7047-6

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