Welcome New and Market-Ready Technologies for Commercial and - - PDF document

6/6/2016 1

Welcome

New and Market-Ready Technologies

for Commercial and Industrial Settings

Drew Morrison and Scott Schuetter, Seventhwave June 7, 2016

Thank you to our sponsor

6/6/2016 2 Scott Schuetter, PE Drew Morrison

Our presenters

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We will cover:

High volume low speed fans Magnetically coupled adjustable speed drives PMAC motors – alternating current PMAC motors – line start

High volume low speed (HVLS) fans

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Overview HVLS Fans

No HVLS Fan HVLS Fan

Stratified Mixed Conduction Losses >25’ 70°F 90°F

Seventhwave

Applications HVLS Fans

• Industrial and Commercial
• Retrofit and New Construction
• Optimal in facilities with:
• Long operating hours
• Constant heating setpoints
• Limited air distribution
• Ceiling heights > 25’
• Minimal roof insulation
• Not radiant systems

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Big Ass Fans

Energy Impact HVLS Fans

• Reduced heating energy
• May be used in place of space cooling
• Additional electricity for fan operation
• Typical savings of $0.10 to $0.25 per square foot of area served

Typical Costs HVLS Fans

• Depends on:
• Fan diameter
• Motor size
• Accessories
• $0.50 to $2.00 per square foot
• Appropriate number of fans for

application is critical

Wikimedia Commons

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Economic Examples HVLS Fans

PARAMETER UNIT EXAMPLE 1 EXAMPLE 2

Electricity saved kWh/ft2

• 0.04
• 0.54

Gas saved therms/ft2 0.19 0.42 Reduction in EUI kBtus/ft2 19.3 40.5 Utility bill savings $/ft2 $0.13 $0.23 Typical capital cost $/ft2 $0.53 $2.19 Typical simple payback years 4.2 9.6

Other Considerations HVLS Fans

Acoustical concerns Installation constraints Activity in the space may cause damage to fans Strobe effect if fans are installed below lights Facility staff must be educated in proper use of fans Potential for drafts if fan speed is too high

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Magnetically coupled adjustable speed drives (MCASD)

Overview MCASD Motors

Savings

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Sarah Sisk, Wikispaces

Applications

• Industrial and Commercial
• Retrofit and New Construction
• Optimal in facilities with:
• Long operating hours
• Large motors
• Replacing constant speed
• Dampers
• Bypass valves

MCASD Motors

Ergzon123, Wikimedia Commons

Energy Impact

• Reduced electric energy
• Typical savings of 30% to 80%
• Only 2/3 of savings from VFD

MCASD Motors

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Typical Costs

• Depends on:
• Motor size
• Accessories
• Installation issues
• Less expensive than VFDs
• < 100 hp: electromagnet
• > 100 hp: permanent magnet
• Typical Payback: 3 to 6 years

MCASD Motors

Motor Size (hp) Equipment Cost ($/hp) < 50 $100 to $400 50 to 100 $100 to $150 > 100 $50 to $100

Economic Examples

PARAMETER UNIT EXAMPLE 1 EXAMPLE 2

Electricity saved kWh/hp 253 180 Utility bill savings $/hp $25 $18 Typical capital cost $/hp $91 $182 Typical simple payback years 3.6 10.2

MCASD Motors

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Comparison to VFDs

• Vibration isolation
• No voltage doubling
• No need to provide cooling to

prevent overheating

• Reduced limitations at low speed
• Availability of replacement parts
• Fewer unplanned outages

MCASD Motors

• Less efficient
• Reduction of peak flow
• 6 to 9%
• Require more physical space.

Benefits Drawbacks

Other Considerations

• Reduced maintenance and longer life
• No requirement for housing in a controlled environment.
• Capable of multiple motor starts with no cool down period
• Inherently protects against load seizure
• Cost effective with medium-voltage power supplies since

they operate independently of motor power supply voltage

• Compatible with existing motors
• No additional motor heating or motor de-rating
• Can be used on motors with greater than 600 volts

MCASD Motors

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QUICK BREAK

Webinar reminders

PMAC motors – alternating current

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Overview PMAC Motors

Aluminum Bars Induced electric current And magnetic field Rotor Stator Copper windings

Source: Wikipedia Source: intechopen.com

Permanent magnets and magnetic field

Induction Motor PMAC Motor

Wikimedia Commons

Applications

• Industrial and Commercial
• Automotive and maritime
• Off-grid
• Optimal in facilities with:
• Long operating hours
• Large motors
• Variable-speed operation

PMAC Motors

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Energy Impact

Higher full-load efficiency

• Efficiency gains depend on

motor hp

“Flatter” efficiency curve

• Less reduction in efficiency

at low motor speeds

PMAC Motors

PMAC Induction (NEMA Premium)

Typical Costs

• Depends on:
• Motor size
• Permanent magnet material
• 20 – 70% cost premium
• Typical payback depends
• n motor duty cycle

PMAC Motors

Wikipedia

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Economic Examples

PARAMETER UNIT EXAMPLE 1 EXAMPLE 2

Electricity saved kWh/hp 113 - 160 2750 Utility bill savings $/hp $11.3 - $16.0 $275 Typical capital cost $/hp Not reported $412 Typical simple payback years Not reported 1.5

MCASD Motors Compared to Induction Motors

• Significant energy savings
• Longer bearing and winding life
• Synchronous operation
• Higher power-to-size ratio

(opportunity for smaller frame size)

• Less waste heat and reduced

cooling requirements

PMAC Motors

• Back EMF limits maximum

speed

• Increased need for safety

precautions due to pinch/ magnetic field hazards

• Possible demagnetization at

high currents and temperatures

• Need matched motor drive
• Capital cost volatility

Benefits Drawbacks

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PMAC motors – line start

Overview Line-Start PMAC Motors

Line Power Electrical Work Motor Drive (Losses) No Drive Motor (Shaft torque + speed = Mechanical Work)

PMAC Motor Line-Start PMAC Motor

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Considerations Line-Start PMAC Motors

• Elimination of drive losses
• Maintains synchronous operation after starting
• Same power factor as induction motors

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Contact us

Drew Morrison Energy Engineer Seventhwave dmorrison@seventhwave.org Scott Schuetter, PE Senior Energy Engineer Seventhwave sschuetter@seventhwave.org