Performance Characteristics of Centrifugal High-Temperature Fans

Performance Characteristics of Centrifugal High-Temperature Fans

Centrifugal high-temperature fans are rotary devices that utilize centrifugal principles. Centrifugal high-temperature fans are essentially variable-flow, constant-pressure devices. Under constant speed conditions, the theoretical pressure-flow curve of a centrifugal high-temperature fan must be a straight line. Due to internal losses, the actual characteristic curve is affected by the curvature of the fan inlet. Changes in air temperature or density can have a significant impact. For a given air intake volume, lower air temperature (lower air density) results in lower pressure. For a specific pressure-flow characteristic curve, there is an output-flow characteristic curve corresponding to the fan reaching a certain speed. During operation, relative to the specified flow rate, the required output increases as the intake temperature decreases. Centrifugal high-temperature fans require frequent flow adjustments based on the host machine’s load. Currently, energy-saving adjustment methods for fans in stone processing enterprises are relatively outdated, typically relying on throttle valves. When using throttle valves, the fan’s flow is primarily regulated by an adjustment valve or throttle damper. Centrifugal high-temperature fans have high throttle losses, resulting in throttle losses exceeding 50% at low loads. Since this operation occurs outside the high-efficiency range and involves throttling losses, energy waste is severe. However, by adjusting the speed of the high-temperature centrifugal fan, throttling losses can be reduced, allowing the fan to operate consistently within the high-efficiency range. Adjusting the speed of the high-temperature centrifugal fan to optimize its operation is an effective method for energy conservation. This reflects a new trend in the current construction industry. To ensure the centrifugal high-temperature fan operates effectively, factors that may hinder its operation must be eliminated at all times to avoid environmental interference. The fan must not be disconnected from the power supply; please take care to protect the power cord during use. To prevent circuit burnout, do not use multiple high-power appliances simultaneously. This is detrimental to the machine’s normal operation.