Using a parametric study to analyse the performance of wood solar dryers with glazed walls

Maderas: ciencia y tecnologia

EZ-Zahraouy, Hamid¹  Bekkioui, Naoual¹  Hakam, Abdelillah²  Zoulalian, André³ 

[1] Mohammed V University of Rabat, Rabat, Morocco;Mohammed V University, Rabat, Morocco;Université de Nancy 1, Nancy, France

关键词: Drying curves;    drying operating parameters;    drying time;    mass transfer coefficient;    solar drying..;   

DOI  :  10.4067/S0718-221X2017005000601

学科分类：农业科学（综合）

来源: Universidad del Bio-Bio

【 摘 要 】

Parameters characterizing wood and air were studied in order to analyze the performance of a wood solar dryer functioning under Moroccan climate. A mathematical model based on the climate data of Rabat city was used to investigate theoretically the wood drying process. Two wood species-thuya (Tetraclinis articulate) and pine (Pinus pinaster)-were examined in the present study. The results obtained by computer simulations are in good agreement with the experimental values. Furthermore, our findings indicate that the use of a global mass transfer coefficient for low temperature convective and homogenous drying conditions allows the influence of the principal operating parameters (wood thickness, wood density, air temperature, air velocity and ventilation mode) on the drying time to be estimated with great accuracy. Analyses pertaining to the two studied wood species revealed that(1) pine dries more quickly than thuya, (2) the drying process is faster in the summer relative to other seasons, (3) increasing the air velocity by 100% results in a 20% reduction in the drying time, and (4)continued ventilation reduces the drying time by 43%.

【 授权许可】

CC BY-NC