Analysis of standby power consumption for lifts and escalators

Document Type

Conference Proceeding

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Lifts and escalators, Standby power, Energy consumption, Hong Kong


Lifts and escalators are very important for urban cities like Hong Kong, for the operation and functioning of high-rise buildings and other facilities. These transportation systems constitute a significant part of the electrical power demand and energy consumption in buildings. However, the information about their energy performance and energy saving measures are limited. Very often, the energy is wasted during the idle and standby situations. This research aims to study the principle and characteristics of standby power for lifts and escalators so as to evaluate possible measures to control and reduce the standby power consumption. Relevant research and technical standards have been studied to identify useful information for assessing the standby power. Field measurements have been carried out in 21 units of lifts and 14 units of escalators in Hong Kong to examine the standby characteristics and energy consumption. It is found that the standby power consumption is affected by traffic demand, operation characteristics, control methods and drive technology. To reduce the standby energy use, it is essential to control non-critical components (such as air-conditioning and lighting). Good potential for energy saving can also be found in motor drive technology and smart controls.

Source Publication

the 7th Greater Pearl River Delta Conference on Building Operation and Maintenance – SMART Facilities Operation and Maintenance, 6 Dec 2016 (Tue), Chiang Chen Studio Theatre, The Hong Kong Polytechnic University

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