fan brake

fan brake

[′fan ‚brāk]
(mechanical engineering)
A fan used to provide a load for a driving mechanism.
References in periodicals archive ?
For a typical, 3"x7' (0.9m x 2.1m) door, the airflow required across it to maintain 60 ft/min (0.3 m/s) is 1,260 cfm (595 L/s) requiring a fan brake horse power of 0.5 bhp.
Fan Break Hp and Energy Difference for a 20,000 (9,439 L/s) system; 2" (500 Pa Total Static Pressure operating 24/7 No Blast Damper Blast Damper Blast Damper undersized (3 psi over pressure) Fan Brake Hp 8.40 12.60 9.66 Fan Brake Base Case +4.20 +1.26 Hp Difference Fan energy 55,181 82,772 63,458 (kWh) Fan energy Base Case +27,591 +8,277 Difference (kWh) Blast Damper (15 psi over pressure) Fan Brake Hp 11.76 Fan Brake +3.36 Hp Difference Fan energy 77,254 (kWh) Fan energy +22,072 Difference (kWh) Table 2.