ENERGY SAVINGS

with NEW & EMERGING

TECHNOLOGIES for

LOW PRESSURE AIR

APPLICATIONS &

PROCESSES

LOW PRESSURE AIR APPLICATIONS

System pressures of 5 to 20 PSIG (1.5 bar)

LOW PRESSURE AIR APPLICATIONS

Traditional Equipment Roots Type Positive Displacement Lobe Blower Multi-Stage Centrifugal Blower

“ROOTS” TYPE BLOWER

Operating principle of a lobe blower

CENTRIFUGAL BLOWER

ENERGY COSTS DRIVING PURCHASING DECISIONS

LIFE CYCLE COSTS

Energy Consumption

Initial Purchase

Maintenance

ENERGY USAGE

Municipal water supply and wastewater treatment systems are among the most energy-intensive facilities owned and operated by local governments, accounting for about 35% of energy used by municipalities.

Approximately 60% of the energy in a wastewater treatment facility is used to make low pressure air.

NEW & EMERGING TECHNOLOGIES

SCREW BLOWER

SCREW BLOWER ENERGY SAVINGS

Screw Blower has internal compression, the traditional “Roots” type blower does not.

With internal compression, the Screw Blower has an efficiency advantage …

At 15 PSIG (1 bar) discharge

25% savings

NEW & EMERGING TECHNOLOGIES

SCREW BLOWER Oil Free Screw Compressor redesigned for

low pressure air applications (20 psig or less) Introduced to the market in 2007

SCREW BLOWER

CAPABILITIES

FLOW RANGE: 300 to 3000 CFM

PRESSURES: 22 PSIG (1.5 bar)

HORSEPOWER 25 to 300 HP

NEW & EMERGING TECHNOLOGIES

HIGH SPEED TURBO BLOWER

NEW & EMERGING TECHNOLOGIES

HIGH SPEED TURBO BLOWER Permanent Magnet Synchronous Motor Efficient aerodynamics (similar to turbo

chargers) Air foil bearings Integrated variable speed drive Introduced to US market in 2008

HIGH SPEED TURBO –ENERGY SAVINGS

Energy savings result from: PM Motor – 95% efficient over a wide

operating range Direct drive – No transmission losses Efficient aerodynamic design Integrated variable speed drive

HIGH SPEED TURBO –ENERGY SAVINGS

For low pressure air applications (15 PSIG or less), as compared to the traditional Roots type blower

Energy Saving of 30% is possible

TURBO BLOWER ASSEMBLY

AIR FOIL BEARING

TURBO BLOWER

CAPABILITIES

FLOW RANGE: 300 to 10,000 CFM

PRESSURE: 15 PSIG (1 bar)

HORSEPOWER: 25 to 600 HP

LOW PRESSURE AIR APPLICATIONS

POWER PLANTS Desulphurization Pneumatic Conveying of Sorbents

CEMENT PLANTS Silo Fluidization Pneumatic Conveying

ASPHALT ROOFING PLANTS Oxidation Air

LOW PRESSURE AIR APPLICATIONS

WASTEWATER TREATMENT PLANT Aeration of wastewater basins

CHEMICALS & PLASTICS PLANT Railcar Unloading Pneumatic Conveying

Applications requiring oil free compressed air from 0.5 bar (7 psig) to 1.5 bar (22 psig)

ENERGY SAVINGS –EXAMPLE #1

ASPHALT ROOFING PLANT Existing 250 HP positive

displacement blower MTBO – 18 months

ENERGY SAVINGS –EXAMPLE #1

ASPHALT AERATION New Screw Blower 200 HP 25% Energy Savings MTBO – 48 to 60 months

ENERGY SAVINGS –EXAMPLE #2

WASTEWATER PLANT HIGH SPEED TURBO

BLOWER 100 HP Replace existing multi-

stage centrifugal blowers 20% Energy Savings

ENERGY SAVINGS –EXAMPLE #3

WASTEWATER PLANT

SCREW BLOWER – 125 HP Replaced existing multi-stage

centrifugal 24% Energy Savings

ENERGY SAVINGS –EXAMPLE #4

CEMENT PLANT Existing Rotary Vane Compressor

ENERGY SAVINGS –EXAMPLE #4

CEMENT PLANT Existing compressor was oversized for higher pressure Screw blower was “right-sized” to save energy Screw blower is oil-free

ENERGY SAVINGS –EXAMPLE #5

DRYING APPLICATION Original drying process

included an oil-flooded screw compressor operating at 40 psig With system redesign, pressure

reduced to 18 psig New Screw Blower eliminates

issues with oil carryover 50% Energy Savings

AN ENERGY SAVING TIPREDUCE SYSTEM PRESSURE

0

20

40

60

80

100

120

6 8 10 12 14 16 18 20 22

DIS

CH

AR

GE

PRES

SUR

E -P

SIG

SPECIFIC POWER - KW per 100 CFM

THANK YOU!

ENERGY SAVINGS with NEW & EMERGING TECHNOLOGIES for LOW PRESSURE AIR APPLICATIONS & PROCESSES