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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