کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
156735 456945 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Application of the reaction engineering approach (REA) for modeling intermittent drying under time-varying humidity and temperature
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Application of the reaction engineering approach (REA) for modeling intermittent drying under time-varying humidity and temperature
چکیده انگلیسی

A ‘good’ drying model is important for the design of dryer, evaluation of dryer performance and prediction of product quality. Among the available models, the reaction engineering approach (REA) is a lumped model, proven to be simple, robust and accurate to model drying of several materials. In this paper, the REA is implemented to model intermittent drying, which is usually practiced for saving energy consumption and maintaining product quality during drying, under time-varying drying air temperature and humidity, which is a challenging drying case to model. For this purpose, the equilibrium activation energy (ΔEv,b) is defined according to the drying settings in each time period and combined with the relative activation energy (ΔEv/ΔEv,b) generated from the convective drying experimental data obtained under constant drying conditions. The mass and heat balances also implement the corresponding drying settings in each time period during the intermittent drying. The results indicate that the REA can describe both the moisture content and temperature profiles of the intermittent drying under time-varying drying air temperature and humidity well. The accuracy, simplicity and robustness of the REA for the intermittent drying under time-varying drying air temperature and humidity are proven here. This has provided a major and significant extension of the REA on modeling challenging drying cases.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 66, Issue 10, 15 May 2011, Pages 2149–2156
نویسندگان
, , , , ,