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Reversible flow fans are used in tunnel ventilation systems and are built so that, as the impeller rotates in a different direction, the suction and discharge directions also shift without really changing the flow rate or pressure. Additionally, they must be more reversible than 90%. As a result, the S-shaped or elliptic blade profiles of these fans are created symmetrically.
In emergency scenarios, changing the flow direction of fans is frequently necessary in the ventilation of mines, chemical facilities, and traffic tunnels.
Two techniques are frequently used in axial flow fans to achieve reverse flow: a) Switching the fan’s rotational direction and spinning the stator vanes. b) Rotor blades turning or being reset while the fan is running. For a standard fan to operate, the needed volume flow rate at flow reversal is typically at least 60%.
The Global reversible flow fan market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
Reversible Flow DC fans, the newest item from Knight Electronics’ Orion Fans business, were just released. Engineers now have the advantage of directional flow and speed control in a single fan thanks to Orion Fans’ Reversible Direction fans, which use the most recent microcontroller-based designs. This functionality was previously not possible.
The reversible direction fans extend the control paradigm by segmenting the PWM duty cycle curve rather than just using pulse-width modulation (PWM) signals to control fan speed. This implies that without the addition of extra cables or electronics, speed control and airflow direction are both possible.
This eventually cuts down on the amount of time, space, and money needed to build a cooling solution. The frame sizes for reversible flow DC fans range from 120mm to 172mm.
