Design and test of controlling frequency circulating fan system in bulk curing barn

Area of Science:

• Agricultural Engineering
• Process Control Systems

Background:

• Inaccurate control of circulating fans leads to poor cured tobacco quality and high energy use.
• Variable wind speed requirements exist during different stages of tobacco curing.

Purpose of the Study:

• To design and implement a variable frequency drive system (VDS) for precise control of circulating fan speed.
• To improve the quality and economic characteristics of cured tobacco through optimized airflow.

Main Methods:

• Developed a variable frequency drive system (VDS) integrated with a curing controller.
• Incorporated anti-interference components for stable system operation.

Main Results:

• The VDS accurately controls airflow speed, unlike traditional high/low-speed fan options.
• Enhanced economic and internal quality of cured tobacco was observed.
• The system demonstrated stable operation without disrupting the curing controller.

Conclusions:

• VDS offers a superior method for controlling wind speed in tobacco curing.
• This technology improves cured tobacco quality and offers energy savings.
• Provides an alternative ventilation and humidity removal strategy for agricultural applications.