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Experimental Investigation of Parabolic Solar Dish Concentrator-Based Solar Dryer Assisted with Thermal Energy Storage System

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Advancement of Science and Technology

Part of the book series: Green Energy and Technology ((GREEN))

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Abstract

Post-harvest losses are a major problem, especially in developing nations. Drying crops with solar energy have a huge economic impact all over the world in terms of reducing post-harvest losses. Experiments with different drying models have been conducted on an indirect active solar dryer using a parabolic dish solar concentrator and rock-bed thermal storage material. Mango slices were dried using solar energy to explore drying performance parameters such as drying rate, quality of dried mango in terms of color, taste, rehydration ratio, and shrinkage ratio. The moisture content was reduced from 82% to 15%. Mango slices dried at 1 m/s air flow rate were of the best quality in terms of color, taste, and shape when compared to those dried at 0.5 and 2 m/s air flow rates in the drying chamber. The average collector thermal and drying efficiency with thermal storage was 65.5% and 16.5%, respectively, based on the test findings. The Page model was determined to be the best fit for mango slice drying among the thin layer drying models studied using criteria of high coefficient of determination (R2) close to unity and lower value of mean bias error, root mean square error, and chi-square value closed to zero.

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Abbreviations

A a :

Aperture area

CO:

Carbon mono oxide

C p :

Specific heat capacity

D R :

Drying rate

eff:

Effective

f :

Focal length

He:

Heat exchanger

HTF:

Heat transfer fluid

I b :

Beam solar radiation

ISD:

Indirect solar dryer

I t :

Total solar radiation

L :

Latent heat of vaporization

Mcdb:

Moisture content dry basis

MCwb:

Moisture content, wet basis

M e :

Equilibrium moisture content

M f :

Final moisture content

M i :

Initial moisture contents

M m :

Moisture content at half time

MRexp,i:

Experimental moisture ratios

MRpre,i:

Predicted moisture ratios

MSD:

Mixed solar dryer

m t :

Moisture content at a time

n :

Number of constant

N :

Number of observations

Q m :

Amount of heat

Re:

Receiver

RHS:

Rectangular high carbon steel

TES:

Thermal energy storage

T pr :

Product temperature

V :

Volume

W d :

Weight of dry matter

W f :

Final sample weight

W i :

Initial sample weight

W p :

Weight of the product

W w :

Weight of water

W wr :

Weight of water removed

η :

Efficiency

η d :

Drying efficiency

ε :

Void fraction

ψ rim :

Parabolic rim angle

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Acknowledgments

The study was supported by faculty of mechanical and industrial engineering, Bahir Dar institute of technology, Bahir Dar Energy Center, Bahir Dar University, Ethiopia.

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Authors and Affiliations

  1. Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, Bahir Dar, Ethiopia

    Hailemariam M. Wassie

  2. Faculty of Mechanical and Industrial Engineering, Bahir Dar Institute of Technology, Bahir Dar University, Bahir Dar, Ethiopia

    Hailemariam M. Wassie, Bimrew T. Admasu, Muluken Z. Getie & Mulat S. Alem

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  1. Hailemariam M. Wassie
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  2. Bimrew T. Admasu
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  3. Muluken Z. Getie
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  4. Mulat S. Alem
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Editor information

Editors and Affiliations

  1. Faculty of Mechanical and Industrial Engineering, Bahir Dar Institute of Technology, Bahir Dar, Ethiopia

    Bereket Haile Woldegiorgis

  2. Department of Chemical and Biochemical Engineering, University of Western Ontario, Ontario, Canada

    Kibret Mequanint

  3. Faculty of Mechanical and Industrial Engineering, Bahir Dar Institute of Technology, Bahir Dar, Ethiopia

    Muluken Zegeye Getie

  4. Faculty of Chemical and Food Engineering, Bahir Dar University, Bahir Dar, Ethiopia

    Eshetu Getahun Mulat

  5. School of Materials Science and Engineering, Bahir Dar University, Bahir Dar, Ethiopia

    Addisu Alemayehu Assegie

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Wassie, H.M., Admasu, B.T., Getie, M.Z., Alem, M.S. (2023). Experimental Investigation of Parabolic Solar Dish Concentrator-Based Solar Dryer Assisted with Thermal Energy Storage System. In: Woldegiorgis, B.H., Mequanint, K., Getie, M.Z., Mulat, E.G., Alemayehu Assegie, A. (eds) Advancement of Science and Technology . Green Energy and Technology. Springer, Cham. https://doi.org/10.1007/978-3-031-33610-2_15

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  • DOI: https://doi.org/10.1007/978-3-031-33610-2_15

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  • Online ISBN: 978-3-031-33610-2

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