Study of Parameters Affecting Thermal Drying Process. | ||||
| MEJ- Mansoura Engineering Journal | ||||
| Article 11, Volume 31, Issue 4, December 2006, Page 1-16 PDF (1.52 MB) | ||||
| Document Type: Research Studies | ||||
| DOI: 10.21608/bfemu.2021.198876 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Mohamed Gamal Hassan Wasel* 1; Hesham Mostafa2; Gamal Ibrahim Ahmed Sultan3; A. Abd El-Badie4 | ||||
| 1Professor of Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt. | ||||
| 2Mechanical Engineering Department., Higher Technological Institute., Tenth of Ramadan City., Egypt. | ||||
| 3Associate Professor., Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt. | ||||
| 4Research Student | ||||
| Abstract | ||||
| Parameters affecting drying process has been studied experimentally as it associated with heat and mass transfer between porous bed to be dried and air which flows through the porous bed. To perform this study, a test rig is designed and constructed as it consists of vertical circular duct packed with wet porous bed which is made from clay balls of 20 mm in diameter. Drying process occurs as a result of forcing hot air vertically to pass through the wet porous bed, evaporation of moisture is existed in the bed due to the simultaneous heat and mass transfer. The studied operating parameters are inlet air temperature, inlet air mass flux, porous bed depth and porosity of balls. The average heat and mass transfer coefficients are estimated for flow of hot air through the wet porous bed. The results indicated that, the drying rate is directly proportional to inlet air temperature, mass flux of air, dimensionless bed depth and ball porosity. So, Drying process can be achieved in lower time as increasing both air mass flux and or inlet air temperature and decreasing bed depth. Also, heat transfer coefficient and mass transfer coefficient increase with increasing inlet air temperature, inlet air mass flux, and ball porosity, but they decrease with increasing bed depth. Comparison between the obtained experimental results and the previous work gave the same trend. | ||||
| Keywords | ||||
| Heat and Mass Transfer; Drying and Wet Porous Bed | ||||
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