• Slideshow - EC-Rechenbeispiele (DE)

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Calculation Examples

Rosenberg EC-fans have high energy saving potential under full load and especially under partial load. The efficiency losses are significantly lower than with conventional AC-motors at the same air flow. The improved energy efficiency results in fewer CO2 emissions. In addition there are lower investment costs for speed control of the fan. A control transformer, VFD or phase angle controller are not necessary. All necessary components are already contained in the EC-motor electronics. Modern EC-technology from Rosenberg is not only easy on the wallet, but also on the environment.

Representative calculation examples:

» EC Centrifugal fans

Energy saving potential of EC Centrifugal fans, Size 560

Operating point Short-term 100% Day operation 80% Night operation 60%  
Air volume 8.000 m³/h 6.400 m³/h 4.800 m³/h  
Static pressure 500 Pa 320 Pa 180 Pa  
Power EC 1) 1.940 W 1.040 W 483 W  
Power AC 2) 2.650 W 1.810 W 1.080 W  
Operation time per day 2 hours 10 hours 12 hours  
  Energy consumption per year
Total
Power consumption EC 1.416 kWh/a 3.796 kWh/a 2.116 kWh/a 7.328 kWh/a
Power consumption AC 1.935 kWh/a 6.607 kWh/a 4.730 kWh/a 13.271 kWh/a
         
Saving 518 kWh/a 2.811 kWh/a 2.615 kWh/a 5.944 kWh/a
Saving in % 26,8 % 42,5 % 55,3 % 44,8 %
         
  Cost saving per year 3)
1.189 EUR
  Emission reduction per year 4)
3,60 t CO2

1) Type: EHAG 560.6IF  •  2) comparable AC fan    3) electricity costs per kWh: 0,20 EUR    4) Source: Umweltbundesamt (0,605 kg CO2 / kWh)

» EC Tube fans

Energy saving potential of EC Tube fans, Size 250

Operating point Short-term 100% Day operation 80% Night operation 60%  
Air volume 500 m³/h 400 m³/h 300 m³/h  
Static pressure 300 Pa 192 Pa 108 Pa  
Power EC 1) 111 W 59 W 26 W  
Power AC 2) 165 W 111 W 74 W  
Operation time per day 2 hours 10 hours 12 hours  
  Energy consumption per year Total
Power consumption EC 81 kWh/a 215 kWh/a 114 kWh/a 410 kWh/a
Power consumption AC 120 kWh/a 405 kWh/a 324 kWh/a 850 kWh/a
         
Saving 39 kWh/a 190 kWh/a 210 kWh/a 439 kWh/a
Saving in % 32,7 % 46,8 % 64,9 % 51,7 %
         
  Cost saving per year 3) 88 EUR
  Emission reduction per year 4) 0,27 t CO2

1) Type: R 250 G.3BK • 2) comparable AC fan 3) electricity costs per kWh: 0,20 EUR 4) Source: Umweltbundesamt (0,605 kg CO2 / kWh)

» EC Duct fans

Energy saving potential of EC Duct fans, Size 400

Operating point Short-term 100% Day operation 80% Night operation 60%  
Air volume 2.500 m³/h 2.000 m³/h 1.500 m³/h  
Static pressure 250 Pa 160 Pa 90 Pa  
Power EC 1) 374 W 209 W 102 W  
Power AC 2) 492 W 368 W 248 W  
Operation time per day 2 hours 10 hours 12 hours  
  Energy consumption per year Total
Power consumption EC 273 kWh/a 763 kWh/a 447 kWh/a 1.483 kWh/a
Power consumption AC 359 kWh/a 1.343 kWh/a 1.086 kWh/a 2.789 kWh/a
         
Saving 86 kWh/a 580 kWh/a 639 kWh/a 1.306 kWh/a
Saving in % 24,0 % 43,2 % 58,9 % 46,8 %
         
  Cost saving per year 3) 261 EUR
  Emission reduction per year 4) 0,79 t CO2

1) Type: KHAG 400.5FA • 2) comparable AC fan 3) electricity costs per kWh: 0,20 EUR 4) Source: Umweltbundesamt (0,605 kg CO2 / kWh)

» EC Roof fans

Energy saving potential of EC Roof fans, Size 450

Operating point Short-term 100% Day operation 80% Night operation 60%  
Air volume 4.000 m³/h 3.200 m³/h 2.400 m³/h  
Static pressure 360 Pa 230 Pa 130 Pa  
Power EC 1) 791 W 422 W 198 W  
Power AC 2) 983 W 632 W 358 W  
Operation time per day 2 hours 10 hours 12 hours  
  Energy consumption per year Total
Power consumption EC 577 kWh/a 1.540 kWh/a 867 kWh/a 2.985 kWh/a
Power consumption AC 718 kWh/a 2.307 kWh/a 1.568 kWh/a 4.592 kWh/a
         
Saving 140 kWh/a 767 kWh/a 701 kWh/a 1.607 kWh/a
Saving in % 19,5 % 33,2 % 44,7 % 35,0 %
         
  Cost saving per year 3) 321 EUR
  Emission reduction per year 4) 0,97 t CO2

1) Type: DVW 450-G.5FA • 2) comparable AC fan 3) electricity costs per kWh: 0,20 EUR 4) Source: Umweltbundesamt (0,605 kg CO2 / kWh)

» EC Unoboxes

Energy saving potential of EC Unobox, Size 450

Operating point Short-term 100% Day operation 80% Night operation 60%  
Air volume 3.600 m³/h 2.880 m³/h 2.160 m³/h  
Static pressure 280 Pa 180 Pa 100 Pa  
Power EC 1) 533 W 289 W 138 W  
Power AC 2) 691 W 477 W 290 W  
Operation time per day 2 hours 10 hours 12 hours  
  Energy consumption per year Total
Power consumption EC 389 kWh/a 1.055 kWh/a 604 kWh/a 2.048 kWh/a
Power consumption AC 504 kWh/a 1.741 kWh/a 1.270 kWh/a 3.516 kWh/a
         
Saving 115 kWh/a 686 kWh/a 666 kWh/a 1.467 kWh/a
Saving in % 22,9 % 39,4 % 52,4 % 41,7 %
         
  Cost saving per year 3) 293 EUR
  Emission reduction per year 4) 0,89 t CO2

1) Type: Uno 67-450-G.5HF • 2) comparable AC fan 3) electricity costs per kWh: 0,20 EUR 4) Source: Umweltbundesamt (0,605 kg CO2 / kWh)

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