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Experimental investigation of drying of garlic clove in solar dryer using phase change material as energy storage

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Abstract

This investigation deals with thermodynamic analysis, which offers an alternative approach to evaluate the performance of solar dryers and thin-layer drying characteristics of garlic cloves in a developed system. The garlic cloves were dried from a moisture content of 55.5 % (w.b.) to 6.5 % (w.b.) for 8 h. The drying data obtained were fitted to five different drying kinetics models. Of these, the model suggested by Midilli et al. [28] had the best fit with the drying behavior of garlic cloves. The energy efficiency without and with recirculation of the air exiting the drying chamber during the study varied from 43.06 to 83.73 %, and 3.98 to 14.95 %, respectively, while the exergy efficiency corresponding to the energy efficiency of the drying process ranged from 5.01 to 55.30 % and 67.06 to 88.24 %, respectively.

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Abbreviations

M e :

moisture content in equilibrium state (dry basis)

M o :

moisture content at t = 0 (dry basis)

M t :

moisture content at t (dry basis)

MR :

Moisture ratio

\( \dot{m}_{\text{a}} \) :

Mass flow rate of air at drying chamber inlet, kg s−1

\( \dot{m}_{\text{s}} \) :

Mass flow rate of solar fluid at drying chamber inlet, kg s−1

\( C_{\text{pa}} \) :

Specific heat of air, J kg−1 K−1

\( C_{\text{pa}} \) :

Specific heat of solar fluid, J kg−1 K−1

T o :

Reference temperature, K

T 1 :

Inlet air temperature at drying chamber, K

T 3 :

Outlet temperature of solar fluid, K

T 4 :

Inlet temperature of solar fluid, K

T 2 :

Air temperature at drying chamber outlet, K

\( \varphi \) :

Exergy efficiency,  %

EUE:

Energy utilization efficiency, %

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Authors and Affiliations

  1. Department of Renewable Energy Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur, 313001, Rajasthan, India

    Vikas Shringi, Surendra Kothari & N. L. Panwar

Authors
  1. Vikas Shringi
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  2. Surendra Kothari
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  3. N. L. Panwar
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Correspondence to Vikas Shringi.

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Shringi, V., Kothari, S. & Panwar, N.L. Experimental investigation of drying of garlic clove in solar dryer using phase change material as energy storage. J Therm Anal Calorim 118, 533–539 (2014). https://doi.org/10.1007/s10973-014-3991-0

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  • DOI: https://doi.org/10.1007/s10973-014-3991-0

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