Presentation on elevator energy to the International Association of Elevator Consultants

1. ENERGY is Force x Distance! Jim Bos IAEC Forum May 15, 2010 07/06/10

3. Contents / Agenda IAEC Forum May 15, 2010 1. Introduction & Purpose 2. Basics of Power, Energy and Efficiency 3. Power x Time vs. Force x Distance 4. Practical application 5. Q&A 07/06/10

5. Introduction & Purpose 07/06/10

7. Contents / Agenda IAEC Forum May 15, 2010 1. Introduction & Purpose 2. Basics of Power, Energy and Efficiency 3. Power x Time vs. Force x Distance 4. Practical application 5. Q&A 07/06/10

9. Basics of Power Watts = Volts x Amps Watts = Newton x meters/sec ( Power = Force x Speed) 07/06/10

10. Basics of Energy Watt-sec = Watts x sec Watts-sec = Newton x meter (Energy = Force x Distance) (Energy = Power x Time) 07/06/10

12. Hoisting Energy Flow Drive loss Motor loss Hoistway loss Regeneration Basics of Actual Efficiency 07/06/10 Drive loss Motor loss Hoistway loss At Line At Payload Motoring

13. Hoisting Energy Flow Energy out Energy in 100 100 Basics of 100% Efficiency 07/06/10 Ideal Energy At Line At Payload Motoring Regeneration

14. Hoisting Energy Flow Basics of Efficiency 07/06/10

16. Contents / Agenda IAEC Forum May 15, 2010 1. Introduction & Purpose 2. Basics of Power, Energy and Efficiency 3. Power x Time vs. Force x Distance 4. Practical application 5. Q&A 07/06/10

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20. 07/06/10 0 2 4 6 8 10 12 14 16 18 20 Force (kg) Distance (m) 0 -500 500 1000

21. 07/06/10 0 2 4 6 8 10 12 14 16 18 20 0 -500 500 1000 Force (kg) Distance (m)

22. 07/06/10 0 2 4 6 8 10 12 14 16 18 20 0 -500 500 1000 Force (kg) Distance (m)

23. A = Acceleration (m/sec 2 ) D = Travel Distance (meters) i = Imbalance (kilograms) J = Jerk (m/sec 3 ) M = Mass of the moving system, primarily the weight of the moving system …… divided by the acceleration of gravity plus the rotating mass V = Velocity (m/sec). It is the lesser of 1.) Rated speed or 2.) Maximum speed possible within the travel distance, which is: 07/06/10

25. Contents / Agenda IAEC Forum May 15, 2010 1. Introduction & Purpose 2. Basics of Power, Energy and Efficiency 3. Power x Time vs. Force x Distance 4. Practical application 5. Q&A 07/06/10

26. Hoisting Energy Flow 07/06/10

27. The weighted averages for energy per elevator start in this example: Load = 7.7% of capacity Travel = 50.1% of total travel 07/06/10

29. Contents / Agenda IAEC Forum May 15, 2010 1. Introduction & Purpose 2. Basics of Power, Energy and Efficiency 3. Power x Time vs. Force x Distance 4. Practical application 5. Q&A 07/06/10

30. Questions?