An analysis of electricity end-use in air-conditioned office buildings in Hong Kong

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

79 Scopus Citations
View graph of relations


Original languageEnglish
Pages (from-to)493-498
Journal / PublicationBuilding and Environment
Issue number3
Publication statusPublished - Mar 2003


There has been a growing interest in the electrical end-use patterns in air-conditioned commercial buildings in Hong Kong. A total of four high-rise fully air-conditioned office buildings were selected as case studies. The total building electrical load was broken down into four major electricity end-users, namely heating, ventilation and air-conditioning (HVAC), lighting, small power and lift/escalator. The hourly load profiles of these electricity end-users were monitored during the hot summer months of July and August. It was found that HVAC was the single largest electricity end-user, accounting for 30-60% of the total building electrical demand during office hours. Electric lighting was second with 20-35% and small power third with 15-25%. Lift/escalator accounted for a few percentage of the total building load. An analysis of the peak load revealed that chiller load was a major component. It was found that chiller load shifting using thermal chilled store could reduce the peak building load by about 20%. © 2003 Elsevier Science Ltd. All rights reserved.

Research Area(s)

  • End-use load, Load shifting, Measured electricity consumption, Office buildings