Energy efficiency – the specifics
Convincing calculation examples from the widest range of sectors
Calculation example, energy recovery
Hoisting drive in a high-bay racking system
Valuable energy is lost when ever a braking resistor is used. For instance, this becomes quite clear when investigating a hoisting drive for high-bay racking units. The comparison between a standard converter and a converter with Efficient Infeed Technology - which feeds the braking energy back into the line supply - speaks for itself.
Energy costs reduced by: 52 %
Space saving: 77 %
For cost reasons, the delivery rate of a large water fountain, which is operated with a 900 kW pump, is to be optimized depending on the time of day. The pump delivery rate should be 100 % when a lot of people are around, 60% in the morning and evenings – and only 30 % during the night. The SinaSave energy saving program calculates in advance the saving when a frequency converter is used to control the pump delivery rate.
Energy costs reduced by: 58 %
Return on investment: 490 %
Payback time: 3 months
For an air conditioning system in an office building, the SinaSave energy-saving program calculates the potential saving when closed-loop speed control with a frequency converter is used. This should be used to drive the fan, which keeps the room temperature at the desired setpoint, as well as also the fans which are used to maintain a constant air pressure in the offices.
Energy costs reduced by: 68 %
Return on investment: 215 %
Payback time: 6 months
In a wastewater treatment plant, three radial compressors – each with a rating of 55 kW - blow air into so-called activation basins. This process removes organic dirt particles and ammonium from the pre-treated water. The SinaSave energy-saving program determines the cost saving when a frequency converter is used to control the speed of the compressors compared to the previous uncontrolled operation.
Energy costs reduced by: 82 %
Return on investment: 658 %
Payback time: 2 months