Journal ArticleDOI
Optimal operating conditions for a batch fluidised bed dryer
Reads0
Chats0
TLDR
In this paper, a batch fluidized bed dryer is used to predict the particle moisture content and temperature profiles during the drying process and it is shown that the wall temperature has a major effect on the predictions.Abstract:
In this study, operating conditions for a batch fluidised bed dryer are found that achieve the specifications on the final moisture level, while minimising the energy consumption. The operating conditions are obtained by solving an optimisation problem, where the specification for the final moisture content of the bed is included as a constraint. The optimisation is based on a lumped mechanistic model that describes the heat and mass transfer between solid, gas and bubble phases in the bed. Experimental validation of this model shows that it can be used to predict the particle moisture content and temperature profiles during the drying process and it is shown that the wall temperature has a major effect on the predictions. Compared to the standard approach of maintaining the inlet air temperature and flow rate at constant values, the optimal operating conditions for a lab-scale bed dryer reduce the energy consumption by 26% and shorten the duration of a batch by 20 min.read more
Citations
More filters
Journal ArticleDOI
Fuzzy logic-based adaptive gravitational search algorithm for optimal tuning of fuzzy-controlled servo systems
TL;DR: An adaptive gravitational search algorithm (AGSA) which carries out adaptation of depreciation law of the gravitational constant and of a parameter in the weighted sum of all forces exerted from the other agents to the iteration index is proposed.
Journal ArticleDOI
Nonlinear model predictive control of a batch fluidized bed dryer for pharmaceutical particles
Francis Gagnon,André Desbiens,Éric Poulin,Pierre-Philippe Lapointe-Garant,Jean-Sébastien Simard +4 more
TL;DR: In this paper, a pilot-scale batch fluidized bed dryer (FBD) was used to achieve a specific particle moisture content setpoint at the end of the drying batch while decreasing cycle time and limiting particle temperature, and a penalty term on the energy consumption was added to the usual tracking control cost function.
Journal ArticleDOI
Development and validation of a batch fluidized bed dryer model for pharmaceutical particles
TL;DR: Batch fluidized bed drying is a common process for water removal in pharmaceutical particles and multiple phenomenological models for this type of dryer are proposed in the literature, with ma... as mentioned in this paper.
Journal ArticleDOI
Challenges and Opportunities Associated with Drying Rough Rice in Fluidized Bed Dryers: A Review
Kaushik Luthra,Sammy Sadaka +1 more
TL;DR: In this article, a review article explores fluidized bed drying and details its advantages and disadvantages related to rice drying, and sheds light on the effects of the operating parameters, i.e., rice moisture content, drying temperature, airflow rate, air velocity, drying duration, and tempering duration, on dryer performance and rice quality.
Journal ArticleDOI
A performance analysis of batch fluidized bed drying of two pharmaceutical powders by desirability approach
TL;DR: In this paper, a multi objective optimization of batch fluidized drying of two pharmaceutical powders (Group A particles and Group B particles) has been performed using desirability function, where the objective function is to find the optimal mixture of two powders.
References
More filters
BookDOI
Handbook of Industrial Drying
TL;DR: In this article, Arun S. Mujumdar and Zdzislaw Pakowski discuss the fundamental principles, classification, and selection of spray dryers for various industrial spray drying processes.
Book
Practical Methods for Optimal Control Using Nonlinear Programming
John T. Betts,I Kolmanovsky +1 more
TL;DR: The optimal control problem is illustrated with examples of large, sparse nonlinear programming and a comparison of optimal control problems in the context of discrete-time programming.
Journal ArticleDOI
Heat transfer in packed beds—a reevaluation
Chi-Hsiung Li,Bruce A. Finlayson +1 more
TL;DR: In this paper, data for heat transfer from packed beds are reexamined in the light of new insights, including a length effect resulting from a higher bidderpϵR(1-ϵ)=0.27.
Book
Industrial Drying of Foods
TL;DR: The Industrial Drying of Foods: An Overview as mentioned in this paper is an overview of the industrial drying of foods, including through-flow dryers, spray dryers and dielectric dryers.
Journal ArticleDOI
Control Engineering in Drying Technology: Review and Trends
TL;DR: In this article, a review of 71 relevant publications all dealing with control aspects in drying is presented, showing that the use of control tools really started to emerge in drying applications only since 1979 and new trends based on more advanced concepts have also appeared in drying control.