Journal Article

Modeling and Simulation of Thin Layer Solar Drying of Guava (Psidium guajava L.) Slices

Ahmed, Abd Elmoneim Osman, Osman,Omer Elmahi Mohammed, Noor Elhadi, Tasneem Osman, Ismail, Mohammed Ayoub, Elmsaad, Egbal

2018

Overview

Solar drying experiments in thin layer of guava slices were conducted at the department of food processing, Faculty of Engineering and Technical Studies, University of El imam El mahdi, Kosti, Sudan during the period 10/5/2012- 25/5/2012. The objectives of the study were, to investigate thin layer solar drying kinetics of guava slices, modeling and simulation of solar drying of guava slices process and testing the validity of thin layer drying models by comparing the simulation results of moisture content with the experimental ones. A natural convective solar dryer was used to carry out the drying experiments. The solar dryer contains solar collector and a drying chamber in which the slices of guava were placed in movable trays. The mass of guava slices was recorded continuously every hour (1hour interval). The drying process of guava slices was carried out during two consecutive days interrupted by one night period. The obtained drying curves were tested by being fitted to the three mathematical drying models, namely Lewis, Page and Henderson and Pabis models. It appeared that, the change in moisture content of guava slices took place during the first day of the drying process. The drying process occurs in the falling rate period and moisture diffusion was the dominant physical mechanism governing moisture movement within guava slices. The three tested models simulated the guava slices drying process adequately but among these models, Page simulation results were the most accurate ones.

• Publisher: جامعة سنار
• Subject: التجارب الزراعية / الدراسات الهندسية / الطاقة الشمسية / المنتجات الزراعية