Developing a Methodology for Measuring the Comparative Energy Efficiency of Elevators

Abstract

Existing elevator systems are upgraded approximately every 20 years, providing an opportunity for energy reduction upgrades. This demands complicated analysis because elevators consume energy while at idle and in lifting modes. Traffic patterns, loads and building usage must also be considered in addition to energy recovering potentials. An objective and inclusive measurement methodology for measuring elevator energy efficiency is essential for a valid cost benefit analysis. The necessary requirements for a workable system and a usable first generation solution are presented.

Tall Buildings and Elevators: A Review of Recent Technological Advances

“…"The trick behind the system is a gearless technology based around a permanent magnet AC motor. A gearless machine operating at less than 240 rpm can reach the same speed as a geared machine at 1800 rpm" [13]. Additional savings are achieved by having the new system's motor consumes zero energy when the elevator is not in use.…”

“…Finally, the new elevator system is designed to accommodate high efficiency LED lighting in the cabs. Collectively, the new elevator system results in significant savings that reduce demand on the city power grid [13,14,53].…”

“…These companies are producing and implementing premium elevators that enjoy improved controls, hardware, and other systems that not only use less energy but are also much more compact, efficient, and even generate electricity that a building can use. This study also builds on the work of many scholars who have been active in elevator design and technology research [12][13][14][15][16][17][18].…”