6/6/2016 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
6/6/2016 Our presenters Drew Morrison Scott Schuetter, PE 2
6/6/2016 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
6/6/2016 HVLS Fans Overview No HVLS Fan HVLS Fan Conduction 90°F Losses >25’ Mixed Stratified 70°F HVLS Fans Applications � 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 Seventhwave 4
6/6/2016 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
6/6/2016 HVLS Fans Economic Examples PARAMETER UNIT EXAMPLE 1 EXAMPLE 2 kWh/ft 2 Electricity saved -0.04 -0.54 Gas saved therms/ft 2 0.19 0.42 kBtus/ft 2 Reduction in EUI 19.3 40.5 $/ft 2 Utility bill savings $0.13 $0.23 Typical capital cost $/ft 2 $0.53 $2.19 Typical simple payback years 4.2 9.6 HVLS Fans Other Considerations � Acoustical concerns � Installation constraints � Activity in the space may cause damage to fans � Strobe effect if fans are installed below lights � Facility staff must be educated in proper use of fans � Potential for drafts if fan speed is too high 6
6/6/2016 Magnetically coupled adjustable speed drives (MCASD) MCASD Motors Overview Savings 7
6/6/2016 MCASD Motors Applications � Industrial and Commercial � Retrofit and New Construction � Optimal in facilities with: • Long operating hours • Large motors • Replacing constant speed - Dampers - Bypass valves Sarah Sisk, Wikispaces MCASD Motors Energy Impact � Reduced electric energy � Typical savings of 30% to 80% • Only 2/3 of savings from VFD Ergzon123, Wikimedia Commons 8
6/6/2016 MCASD Motors Typical Costs Motor Size Equipment Cost � Depends on: (hp) ($/hp) • Motor size < 50 $100 to $400 • Accessories • Installation issues 50 to 100 $100 to $150 � Less expensive than VFDs > 100 $50 to $100 • < 100 hp: electromagnet • > 100 hp: permanent magnet � Typical Payback: 3 to 6 years MCASD Motors 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 9
6/6/2016 MCASD Motors Comparison to VFDs Benefits Drawbacks � � Less efficient Vibration isolation � � No voltage doubling Reduction of peak flow � No need to provide cooling to • 6 to 9% prevent overheating � Require more physical space. � Reduced limitations at low speed � Availability of replacement parts � Fewer unplanned outages 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
6/6/2016 QUICK BREAK Webinar reminders PMAC motors – alternating current 11
6/6/2016 PMAC Motors Overview Induction Motor PMAC Motor Aluminum Bars Copper windings Stator Rotor Source: intechopen.com Permanent magnets Source: Wikipedia Induced electric current and magnetic field And magnetic field PMAC Motors Applications � Industrial and Commercial � Automotive and maritime � Off-grid � Optimal in facilities with: • Long operating hours • Large motors Wikimedia Commons • Variable-speed operation 12
6/6/2016 PMAC Motors Energy Impact � Higher full-load efficiency PMAC • Efficiency gains depend on motor hp Induction (NEMA � “Flatter” efficiency curve Premium) • 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
6/6/2016 MCASD Motors 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 PMAC Motors Compared to Induction Motors Drawbacks Benefits � Back EMF limits maximum � Significant energy savings speed � Longer bearing and winding life � Increased need for safety � Synchronous operation precautions due to pinch/ � Higher power-to-size ratio magnetic field hazards (opportunity for smaller frame � Possible demagnetization at size) high currents and temperatures � Less waste heat and reduced � Need matched motor drive cooling requirements � Capital cost volatility 14
6/6/2016 PMAC motors – line start Line-Start PMAC Motors Overview Line-Start PMAC Motor PMAC Motor Line Power Electrical Work Motor Drive No Drive (Losses) Motor (Shaft torque + speed = Mechanical Work) 15
6/6/2016 Line-Start PMAC Motors Considerations � Elimination of drive losses � Maintains synchronous operation after starting � Same power factor as induction motors 16
6/6/2016 Contact us Drew Morrison Energy Engineer Seventhwave dmorrison@seventhwave.org Scott Schuetter, PE Senior Energy Engineer Seventhwave sschuetter@seventhwave.org 17
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