Electrical Power Savings
Optidrive™ variable speed drives are widely used to control the speed of fans in many different applications, as they represent the most energy efficient solution to controlling airflow levels. Traditional mechanical methods such as dampers are highly inefficient, and significant savings directly in electrical energy consumption are possible simply by replacing these methods with an Optidrive™ variable speed drive.
The graph above shows the typical performance of a damper compared to an Optidrive™, in terms of the energy required to provide the demanded airflow. With a traditional damper system, as airflow is reduced, energy consumption reduces by only a small amount, however the Optidrive™ provides significant energy savings even with only relatively small reduction in speed. This is possible thanks to the fan law, which shows that the energy required by a fan is directly proportional to the cube of the fan speed.
Integrated Feedback Systems
A temperature feedback signal can be fed directly to the Optidrive (e.g. 0 - 10 Volt, 4 - 20mA, 0 - 20mA), allowing the Optidrive™ to automatically maintain the correct airflow. When reduced airflow is required, the Optidrive™ will automatically reduce the fan speed, leading to direct energy savings. The resulting air pressure can then be used to directly control the fuel flow, maintaining correct air / fuel ratios under all conditions.