Energy Optimisation of an Industrial Process Fan System

Industrial fans perform the crucial function of moving “gases”, “heat”, “fumes”, “dust” and “air” within manufacturing facilities, apart from supporting core capabilities like “cooling”, “ventilation”, “combustion”, “drying”, “exhaust processes” and “dust collection”. Since industrial fans usually operate for long periods, energy optimisation ends up assuming crucial significance when it comes to keeping total equipment costs under control. Energy optimisation doesn’t necessarily imply the replacement of the entire fan system. Sometimes correct system design, appropriate maintenance checks and better control can also contribute significantly to reduced lifetime costs.

Start by Understanding the Fan System
In order to understand energy consumption in its entirety, it’s first important to find out what the fan is supposed to do. The basic function of industrial fans includes moving pressure and airflow with the operating hours and conditions varying with production processes. Consider all these aspects together to understand whether “energy” is being wasted or not.

Avoid Unnecessary Airflow and Pressure
Reducing unnecessary airflow remains one of the simplest ways to cut down on wasted energy. The operating requirements of the fans may increase with significant changes in production processes. So even minor reductions in energy use can add up to result in major savings over time.

Facility owners cannot simply reduce “wasted energy” by turning down every fan. Keeping components like ductwork, dampers, and filters clean and checking relevant warning signs and addressing them without delay can support energy efficiency, as well.

Use Variable Speed Control Where Appropriate
Variable speed control is particularly recommended for facilities where process demands change throughout the day. It allows the fan speed to be adjusted exactly as per processing demands. Without variable speed controls, the fans end up operating at full speed through long hours even if the processes do not require them to run at their maximum speed- thereby leading to unnecessary energy usage.

Keep Filters, Ducts and Components in Good Condition
Resort to “consistent maintenance schedules” to keep filters, ducts, and other important components in good condition. Belts can wear or loosen, filters can slowly collect dust and start resisting airflow, fan blades can gather dirt and grime, and bearings can slowly damage over time.

With increasing problems and parts resisting airflow, fans may end up performing poorly – leading to unnecessary energy usage. As such, it is important to inspect ductwork, filters, bearings, dampers and belts regularly to ensure seamless capabilities, higher energy efficiency and longer shelf-life.

Check the Motor and Fan Together
The fan and motor should be checked together instead of being treated in silos. A motor, no matter how efficient it is, cannot really compensate for a poorly matched, undersized, or oversized fan.

If the fan is larger than what the process requires, it ends up consuming energy that you don’t need. On the other hand, an undersized fan cannot meet the airflow requirements of the facility, leading to “production delays” and “overall performance inefficiency”. It’s important to measure “airflow”, “motor power”, and “operating conditions” to determine whether the system is performing as intended.

Conclusion
Energy efficiency should never be treated as an “additional task” but as part of “daily operations management” in factories. In factories where “ventilation systems”, “fans”, “dust collectors” and “boilers” are operating together, their controls should be coordinated as efficiently as possible.

A well-maintained and properly coordinated system can deliver the required airflow and pressure without consuming unnecessary energy.