Selecting a fan (CFM) Step 1. decide air speed required (desirable air speed to be decided by thermal design and verified by simulation/test): ie 2.17 m/s Step 2. locate vent size (assume fully open vent): ie 50 x 50 mm2 = 0.0025 m2 Step 3. calculate required CFM(cubic feet per min): ie 2.17 m/s * (50 x 50 mm2) = 0.005425 m3/s = 0.3255 m3/min = 11.50 ft3/min, CFM *reference https://www.eetimes.com/document.asp?doc_id.. 더보기 이전 1 ··· 8 9 10 11 12 13 14 ··· 135 다음