In a fan characteristic curve, what is the point called where the fan curve intersects the duct curve?

The point where the fan characteristic curve intersects the duct curve is referred to as the Fan Operating Point. This point is critical because it represents the specific conditions under which the fan will operate within a given system. At this intersection, the system pressure (as described by the duct curve) matches the pressure the fan can provide at a particular air flow rate (shown on the fan curve).

Understanding the Fan Operating Point is essential for effective ventilation system design and operation because it indicates the balance between the fan's output and the system's requirements. It also provides insights into the efficiency and performance of the fan in real-world applications, allowing engineers and operators to determine if the system is operating correctly or if adjustments are needed to optimize airflow and efficiency.

The significance of this point helps in assessing whether the fan is operating within the desired range for maximum performance while meeting system demands. This kind of analytical understanding is crucial for maintaining safety and effectiveness in mine ventilation systems.