1. © Siemens AG 2012. Alle Rechte vorbehalten. I IA CE CPSeite 1 Application  Belt drive for rotary piston fan Application purpose:  Pulp production, rotary piston fan in sieving process for air bag filling Customer requirements  Power demand of the fan with 400 V / 50 Hz and 2940 rotations per minute: P1=7.5 kW, continuous operation S1, constant speed Solution approach  Dimensioning verification and adjustment SIRIUS Application Combustion Air Fan for Steam Generator Firing Application: Steam generator firing: The fan supplies the combustion chamber with combustion air. Customer requirements: The combustion air's volume flow is to be permanently increased from 6120m 3 /h to 7700m 3 /h. Continuous operation S1 Sector:Chemical industry Application: Combustion air fan Flow Rate [L/s] Total Pressure Difference [kPA] Operation Point 1 Operation Point 2 0,00 1,00 2,00 3,00 4,00 5,00 6,00 4400 1/min 4100 1/min 3800 1/min 0,00 4,00 8,00 12,00 16,00 20,00 24,00 Characteristics for Fan

2. © Siemens AG 2012. Alle Rechte vorbehalten. I IA CE CPSeite 2 SIRIUS Application Combustion Air Fan for Steam Generator Firing System layout:  Three-phase asynchronous motor IE1 45 kW, 2980 1/min  The fan is driven with V-belts  Fan speed:  Old: 3875 1/min for 6120 m 3 /h  New: 4415 1/min for 7700 m 3 /h Analysis:  Speed adjustment can either be realized by means of belt pulley replacement or via a frequency converter.  The required expenditures / investment as well as the intended energy savings are decisive for the equipment's selection. Motor conversion to a more energy-saving version is recommendable, e.g. IE2 or IE3 motor. Sector:Chemical industry Application: Combustion air fan

3. © Siemens AG 2012. Alle Rechte vorbehalten. I IA CE CPSeite 3 SIRIUS Application Combustion Air Fan for Steam Generator Firing System components:  SIRIUS switching and protection devices 3RT14 and 3RV1  SIMOTICS low-voltage motor 1LE1 Customer benefits:  Reduced energy costs with one motor by 384.23 €/a and 2.7 t CO 2 /a. The energy-saving solution: Belt pulley replacement and application of IE3 motor as well as SIRIUS switching and protection devices. The energy-saving solution: Belt pulley replacement and application of IE3 motor as well as SIRIUS switching and protection devices. Combustion air fan for steam generator firing Motor Power loss feeder Power loss Energy saving potential CO 2 saving potential Drive data PN power lossDOLFC + filterTotal4000 h0.08563 kWWWWWkWh€/akg/a Motor IE1 + belt pulley replacement 454073.0633.8 4106.86 Motor IE3 452872.34 15174389.34-1129.90-90.39-636.14 Excess consumption compared to IE1 + DOL Motor IE3 + belt pulley replacement 452872.3433.8 2906.144802.90384.232704.03 Savings compared to IE1 + DOL Sector:Chemical industry Application: Combustion air fan CO 2 : 563 g/kWh Power loss of electrical components DOL: Direct online starter

4. © Siemens AG 2012. Alle Rechte vorbehalten. I IA CE CPSeite 4 Pumping, venting, compressing SIRIUS Application Combustion Air Fan for Steam Generator Firing Speed adjustment can either be realized by means of belt pulley replacement or via a frequency converter. Drivers: Expenditures, investment The belt pulley is replaced for energy efficiency reasons. SIMOTICS low-voltage motor 1LE1 IE3 45 kW, 2980 1/min, SIRIUS switching and protection devices 3RT2 contactor and 3RU2 overload relay Steam generator firing: The fan supplies the combustion chamber with combustion air. Customer requirements: The combustion air's volume flow is to be permanently increased from 6120 m 3 /h to 7700 m 3 /h. Continuous operation S1  Energy savings:4,802 kWh/a  Saving potential:384 €/a  CO 2 reduction:2,704 kg/a* *) 563 g/kWh M Load Continuous movement Low Solution Benefits Machine Requirements