Elevator Energy Savings with Modernizationsdaihoagroup.com/uploads/FCK/image/5Elevator_Energy... ·...
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Transcript of Elevator Energy Savings with Modernizationsdaihoagroup.com/uploads/FCK/image/5Elevator_Energy... ·...
Elevator Energy Savings with Modernizations
© 2011, James W Bos, LLCAll rights reserved
Introduction & Purpose
• Market Partner with 20 years experience in elevator technology development:• Sustainable elevator consulting• Independent engineering analysis for
elevator energy rebates• Independent elevator energy testing
• Credited in the Washington Post, Elevator World and a NOVA television program
• Education• BSME from the University of Illinois• MBA from University of Iowa
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Contents / Agenda
1. Introduction & Overview
2. Basics of elevator energy consumption
3. Basics of escalator energy consumption
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4. Q&A
Contents / Agenda
1. Introduction & Overview
2. Basics of elevator energy consumption
3. Basics of escalator energy consumption
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4. Q&A
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Elevators seem to be just there, part of the infrastructure, taken for granted
“In New York City, home to fifty-eight thousand elevators,there are eleven billion trips per year – 30 million every day”
- The New Yorker, 4/21/08
BUILD
MAINTAIN
DESIGN
MODERNIZE
Modernization in the elevator life cycle
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The modernization cycle of an elevator is about 25 years,so NYC averages 1,000’s of modernizations per year
Photo by KONE
Contents / Agenda
1. Introduction & Overview
2. Basics of elevator energy consumption
3. Basics of escalator energy consumption
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4. Q&A
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An example of an elevator energy comparisonEnergy company LEED study, Gulf Coast area
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Different buildings have different traffic patterns
Elevator traffic differs during the day
Elevators energy has been largely ignored and complicated to understand.
Energy decisions about elevators last a long time –25 years or more.
Elevators may contribute significantly to your electrical demand charges
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Lifetime Environmental Impact Assessment Eco-Indicator 99 Method
The stage of the life cycle EI99 values -%
Raw material production 15.0
Component manufacturing 8.2
Transportation to usage place 1.1
Use 74.8
Maintenance 0.7
End of life treatment 0.3
25% is energy to make and install the elevator
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The Installed Energy
Can this be reduced during a modernization?
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An example of an elevator system design
Building populations and uses have changed
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Has the required number of elevators changed since the building was designed?
May I save by modernizing some and removing some from service?
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Scope of the energy rebates
75% is electrical energy to run elevator
Elevators consume energy in 3 ways
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Lighting Hoisting Standby
Hydraulic vs. traction elevators
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Guide Rails
Hoisting Machine
Visualizing a traction elevator hoisting system …
Car
Hoist RopesCounterweight
Controller& Drive
Motoring to lift
Elevators may use … or deliver energy !
Generating to lower
Hoisting Energy Flow
Drive loss Motor loss Hoistway loss
Regeneration
Drive loss Motor loss Hoistway loss
AtLine
AtPayload
Motoring
Basics of Actual Efficiency
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Small change in component efficiency …leads to big change in net energy consumption
Small changes in components have a large effect on energy consumption.
What are my modernization energy specifications?
Ward Leonard, Geared System c.1965
Photo by ElevatorBob.com
Modernized AC Geared System c. 2010
Photo by ElevatorBob.com
Static Drive, DC Gearless (Modernized c.1990)
Photo by ElevatorBob.com
Permanent Magnet Synchronous Gearless
Photos by KONE
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A real example from a modernization at an electrical utility headquarters in Omaha
The choice of elevator technology makesa big difference in energy consumption
The choice lasts a long time: about 25 or more years
Please - specify, quantify and verify !
Contents / Agenda
1. Introduction & Overview
2. Basics of elevator energy consumption
3. Basics of escalator energy consumption
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4. Q&A
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Escalators have considerable machinery to move
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The energy exceeds that to move people!
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From Buildings Magazine
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The 2010 Code allows hibernating the escalator
MTA has applied this to 35 subway stations
Photo by Schindler
To reduce escalator energy:
• Turn them off when not in use
• Utilize power saving controllers
• Utilize hibernating feature whenever allowed
Questions / Discussion?
