Research into Energy Consumption of an Occupant-Centric Intelligent Management Office

Intelligent control systems show promise in reducing building energy consumption, but long-term empirical research on their effectiveness is still limited. This study conducted a 129‑day investigation of an Intelligent Integrated Occupant Centred Control (IOCC) system retrofitted in a real open office environment of approximately 200 m² in Shenzhen, China. The experiment involved 69 volunteers and utilized environmental sensors, occupancy detectors, and wireless smart controllers for data collection. Analysis revealed that the IOCC system reduced overall electricity consumption by 11.87 %. In the open office area, average lighting usage time decreased by 13.36 % (from 14.50 to 12.55 hours per day), while air conditioning usage time reduced by 25.96 % (from 12.39 to 9.2 hours per day). Individual offices exhibited more substantial reductions, with lighting and air conditioning usage times decreasing by 56.09 % and 86.45 %, respectively. Meeting rooms showed reductions of 25.89 % for lighting and 34.02 % for air conditioning. These findings demonstrate the potential of intelligent retrofitting in achieving significant energy efficiency in various office settings, contributing to the development of sustainable building management strategies.