The SinaSave energy-saving program is designed for applications with motors fed from the line supply (fixed speed) and from converters (variable speed). For line supply operation, the cost savings as well the payback time for the additional cost of the Siemens EFF1 energy-saving motors can be calculated using the three bases for comparison.
In comparison to:
- Siemens EFF2 energy-saving motors – Case 1
- Individually selected known motors – Case 2
- Known motors within an overall plant/system analysis – Case 3
The individual application cases are as follows:
Case 1
Calculation of the energy cost savings as well as the payback time for the additional costs of the Siemens EFF1 energy-saving motors when compared to Siemens EFF2 energy-saving motors.
In this case, the motor data for the Siemens energy-saving motors have already been stored complete with their order numbers. In addition, you will also be told the payback time for the additional costs of an energy-saving motor.
Case 2
Calculation of the energy cost savings as well as the payback time for the additional cost of the Siemens EFF1 energy-saving motors in comparison with other known motors.
However, the calculation requires exact knowledge of the technical specifications of the motor which is to be used for the comparison.
Case 3
Calculation of the energy cost savings as well as the payback time for the additional costs of Siemens EFF1 energy-saving motors when compared to any other known motors – plant/system analysis.
For converter operation, SinaSave takes into account all the necessary plant/system-specific parameters. Values required for the process such as flowrate and delivery height for pumps, mass flowrate and total pressure difference for fans as well as the density of the transported medium are taken into account in
addition to the efficiency of the fan, pump or compressor, the electrical efficiency and the overall efficiency of the plant. Other basic data for the program include the number of working days and work shifts as well as the pumping profile over a day and year – decisive data for calculating the actual energy saving.
From the plant/system-specific basic data that has been entered, the program initially selects the drive system with the
appropriate power rating and a price for a suitable frequency inverter. In a further step, the program determines the energy requirements of the variable-speed drive system for the specific application and compares it to the calculated values for all alternative concepts that can be considered for the plant/system in question; including for example, throttle valves, bypass, vane control or pole-changing motors. The energy-saving is obtained from the difference in kilowatt hours which the program then converts into a cash saving using the currently applicable cost of electrical energy for the plant.
The program calculates the payback time from the price of the frequency inverter, the decisive energy-saving and other costreducing effects of variable-speed operation that have also been taken into account, such as an improved power factor and operation that reduces the stress on the equipment in the plant/system.
Product range
The SinaSave program includes the product range of low-voltage motors/energy-saving motors and low-voltage inverters from the MICROMASTER 430 and MICROMASTER 440 product series as well as SINAMICS G110, SINAMICS G120 and SINAMICS G150 converters.