CONDENSER FAN NOISE REDUCTION SOLUTIONS

摘要

A cost effective, energy efficient solution has been developed for reducing low frequencyrncondenser fan noise on a 25 ton commercial size air conditioning system. By replacing three 4-rnbladed, stamped metal, fan blades with a 6, 9 & 12 bladed, highly efficient, airfoil design withrnpitch compensation and speed controller, sound levels were reduced 14 dBA at 77 Hertz. Futurerninstallations could cost less than $1400 and provide up to 15% energy reduction.