ti • • Benefits offered by EFF 1 labelled motors • lmproved efficiency (see the graph below) Lower noise level Higher permissible ambient temperature • Longer bearing life due to reduced temperature. , .. 84.1 2.2 85.6 3 86.7 4 87.6 5.5 88.6 7.5 89.5 Reference numbers Motor [kW] 1.1 • 3.0 4.0 5.5 7.5 • 15 Motor Minimum [kW] efficiency 11 90.5 15 91.3 18.5 91.8 22 92.2 30 92.9 37 93.3 45 93.7 Reference number 98 97 23 98 97 22 98 97 21 98 97 20 • • • • • • • CRN • • • • • • • • • , • • '411 The graph below shows the efficiency le'!el of _ ı!}tt: FF _'J,. • and EFF 2 classified Grundfos motors �i11"th�EU/. CEMEP defined efficiency bands. • • • 11 •·s iHi• • Calculation example showing energy savings of_.;İ high efficiency motor: • f. E,avi ng = Energy savings per year P2 = Nominal power output (4.0 kW) toperating = Operating time (2,500 h/year) Pıoad = Percentage offull load (90%) llnew = Efficiency of new motor (0.89) rı otd = Efficiency of old motor (0.86 E,a v ing = P 2 X P ıoad X toperating X (1/rı Example: E,aving = 4.0 X 0.90 X 2,500 X (1/0.8 = 353 kWh/year. r-M-ııtıaı 1 ' ' 1 • • �
RkJQdWJsaXNoZXIy MTcyMTY=