Performance of Single and Multi-stage Spouted Bed Drying Systems
作者:
ADNANH. ZAHED,
MOUSTAFAM. ELSAYED,
期刊:
Drying Technology
(Taylor Available online 1993)
卷期:
Volume 11,
issue 7
页码: 1783-1808
ISSN:0737-3937
年代: 1993
DOI:10.1080/07373939308916928
出版商: Taylor & Francis Group
关键词: continuous operation;drying efficiency;exhaust air;grain drying;heat-exchanger effectiveness;simulation
数据来源: Taylor
摘要:
A mathematical model is developed to predict the performance of single-stage and multi-stage drying systems using spouted beds. The model uses unsteady state analysis for batch operation to simulate the steady state operation of a continuously fed spouted bed. A parametric study is carried out to study the effect of the following parameters on the performance of a single-stage grain drying system: air flow rate per unit mass of the grain in the bed, ambient air temperature and humidity, initial and target moisture contents, the residence time in the bed, and the effectiveness of the heat exchanger to recover the thermal energy in the exhaust air. The parametric study is also extended to investigate the effect of these parameters (except ambient air temperature and humidity) on the performance of the multi-stage system. In addition, the number of stages is also included in the latter study. The results are presented in terms of charts which may be adopted for the design of such systems.
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