Thermodynamic Evaluation of the Forced Convective Hybrid-Solar Dryer during Drying Process of Rosemary (Rosmarinus officinalis L.) Leaves

Khalife, Esmail and Karami, Hamed and Kaveh, Mohammad and Golpour, Iman and Rusinek, Robert and Dobrzańsk, Bohdan and Gancarz, Marek (2021) Thermodynamic Evaluation of the Forced Convective Hybrid-Solar Dryer during Drying Process of Rosemary (Rosmarinus officinalis L.) Leaves. Energies. pp. 1-16.

[thumbnail of Research Article] Text (Research Article)
Article_E_15-09-2021.pdf - Published Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (1MB)

Abstract

This study aimed to examine the energy and exergy indices of the rosemary drying process
in a hybrid-solar dryer (HSD) and the effects of air-drying parameters on these thermodynamic
indices. Drying experiments were carried out at four levels of air temperature (40, 50, 60, and 70 ◦C)
and three levels of air velocity (1, 1.5, and 2 m/s). Energy and exergy were calculated by application
of the first and second laws of thermodynamics. Based on the principal laws, energy efficiency, exergy
losses, and exergetic improvement potential rate, were evaluated. The results showed that the energy
utilization ratio (EUR) ranged from 0.246 to 0.502, and energy utilization (EU) ranged from 0.017 to
0.060 (kJ/s). Exergy loss and efficiency varied from 0.009 to 0.028 (kJ/s) and from 35.08% to 78.5%,
respectively, and increased with increased temperature and air velocity. It was found that the exergy
loss rate was affected by temperature and air velocity because the overall heat transfer coefficient
was different under these conditions. By comparison, with increasing temperature and air velocity,
the exergy efficiency increased. Because most energy is used to evaporate moisture, this behavior
may be explained by improved energy utilization. The drying chamber sustainability index ranged
from 0.0129 to 0.0293. This study provides insights into the optimization process of drying operations
and operational parameters in solar hybrid dryers that reduce energy losses and consumption.

Item Type: Article
Uncontrolled Keywords: Rosemary,Hybrid solar drying (HSD),Energy and exergy Analysis, Energy utilization ratio,Exergetic efficiency
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Department of Civil Engineering > Research papers
Depositing User: ePrints Depositor
Date Deposited: 09 Oct 2024 07:55
Last Modified: 09 Oct 2024 07:55
URI: https://eprints.cihanuniversity.edu.iq/id/eprint/1676

Actions (login required)

View Item
View Item