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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 1
2 Our presenters Drew Morrison Scott Schuetter, PE 2
3 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 3
4 HVLS Fans Overview No HVLS Fan HVLS Fan Conduction Losses 90 F >25 Stratified Mixed 70 F HVLS Fans Applications Industrial and Commercial Retrofit and New Construction Optimal in facilities with: Seventhwave Long operating hours Constant heating setpoints Limited air distribution Ceiling heights > 25 Minimal roof insulation Not radiant systems 4
5 HVLS Fans Energy Impact Big Ass 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 HVLS Fans Typical Costs 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 5
6 HVLS Fans Economic Examples PARAMETER UNIT EXAMPLE 1 EXAMPLE 2 Electricity saved kwh/ft Gas saved therms/ft Reduction in EUI kbtus/ft Utility bill savings $/ft 2 $0.13 $0.23 Typical capital cost $/ft 2 $0.53 $2.19 Typical simple payback years HVLS Fans Other Considerations Acoustical concerns Installation constraints Activity in the space may cause damage to fans Strobe effect if fans are installed below lights Facility staff must be educated in proper use of fans Potential for drafts if fan speed is too high 6
7 Magnetically coupled adjustable speed drives (MCASD) MCASD Motors Overview Savings 7
8 MCASD Motors Applications Industrial and Commercial Retrofit and New Construction Optimal in facilities with: Sarah Sisk, Wikispaces Long operating hours Large motors Replacing constant speed - Dampers - Bypass valves MCASD Motors Energy Impact Reduced electric energy Typical savings of 30% to 80% Only 2/3 of savings from VFD Ergzon123, Wikimedia Commons 8
9 MCASD Motors Typical Costs Depends on: Motor size Accessories Installation issues Less expensive than VFDs < 100 hp: electromagnet > 100 hp: permanent magnet Motor Size (hp) Equipment Cost ($/hp) < 50 $100 to $ to 100 $100 to $150 > 100 $50 to $100 Typical Payback: 3 to 6 years MCASD Motors Economic Examples PARAMETER UNIT EXAMPLE 1 EXAMPLE 2 Electricity saved kwh/hp Utility bill savings $/hp $25 $18 Typical capital cost $/hp $91 $182 Typical simple payback years
10 MCASD Motors Comparison to VFDs Benefits 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 Drawbacks Less efficient Reduction of peak flow 6 to 9% Require more physical space. MCASD Motors 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 10
11 QUICK BREAK Webinar reminders PMAC motors alternating current 11
12 PMAC Motors Overview Induction Motor PMAC Motor Aluminum Bars Copper windings Rotor Stator Induced electric current And magnetic field Source: Wikipedia Permanent magnets and magnetic field Source: intechopen.com PMAC Motors Applications Industrial and Commercial Automotive and maritime Off-grid Optimal in facilities with: Wikimedia Commons Long operating hours Large motors Variable-speed operation 12
13 PMAC Motors Energy Impact PMAC Higher full-load efficiency Efficiency gains depend on motor hp Induction (NEMA Premium) Flatter efficiency curve Less reduction in efficiency at low motor speeds PMAC Motors Typical Costs Depends on: Motor size Permanent magnet material 20 70% cost premium Typical payback depends on motor duty cycle Wikipedia 13
14 MCASD Motors Economic Examples PARAMETER UNIT EXAMPLE 1 EXAMPLE 2 Electricity saved kwh/hp Utility bill savings $/hp $ $16.0 $275 Typical capital cost $/hp Not reported $412 Typical simple payback years Not reported 1.5 PMAC Motors Compared to Induction Motors Benefits 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 Drawbacks 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 14
15 PMAC motors line start Line-Start PMAC Motors PMAC Motor Overview Line-Start PMAC Motor Line Power Electrical Work Motor Drive (Losses) No Drive Motor (Shaft torque + speed = Mechanical Work) 15
16 Line-Start PMAC Motors Considerations Elimination of drive losses Maintains synchronous operation after starting Same power factor as induction motors 16
17 Contact us Drew Morrison Energy Engineer Seventhwave Scott Schuetter, PE Senior Energy Engineer Seventhwave 17
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March 12, 2013 2 Steve Schouten Donna Densmore 3 Mike Carter Justin Kale 4 Basics Motor Loads Operation Advantages/ Disadvantages Sizing a VFD Power Quality Issues Source: Emerson Industrial Automation