EC axial fans for agricultural ventilation

Energy comparison: axial fans size 800If both fans are operated over the year with the specified load profile, theGreenTech EC fan provides significant cost savings. This is shown in thefollowing image as a function of the energy costs. For example, if theelectricity price is 0.10 EUR per kWh, annual savings of 149 EUR can beexpected.¤25020015014916417919420922323825326828329810050Savingper year0,10 0,11 0,12 0,13 0,14 0,15 0,16 0,17 0,18 0,19 0,20Electricity rate¤/kWhFigure: Annual savings as a function of the energy costsThe following figure provides the view over a longer period. Here, theannual operating costs of both fan concepts are added up over the years.The load profile shown above also served as the basis for the calculationhere. The energy costs have been set at 0.10 EUR per kWh.¤20001500AC1000EC500CostsTime1 2 3 4 5 6 7 8YearsFigure: Operating costs over time at 0.10 EUR/kWhThe specific output of fans is an important and widely used statistic fortheir efficiency. This is shown by the power requirement in watts relativeto a delivery volume of 1000 m³/h . The graph shows the specific outputof both fan concepts, starting at the design operating point of 15.800 m³/h@ 30Pa. The GreenTech EC technology shows its advantages particularlywell in partial-load operation, i.e. at reduced speed. That is preciselywhere barn fans are primarily operated. Another reason to decide in favourof groundbreaking EC technology.40302010ECACWatt per1000 m3/hq V 5000 10000 15000 m 3 /hFigure: Comparison of specific fan power7