|In line with the university’s plan to build a smart campus, a Power Management System (PMS) has been set up as a foundation for campus-wide energy management. The PMS collects real-time data of energy usage and provides basis for monitoring, analysis and improvement. As a first phase, the coverage is more than 20 buildings, mainly in the northern and eastern zones of the campus. The system has been set up for testing since January 2018. In the initial stage, dashboards are placed at E2 (UM Library) and E11 (Faculty of Science and Technology). These dashboards illustrate important information about the consumption mode of specific building or area. The following demonstrates what information can be read directly from the dashboard.
The top two graphs give the real-time consumption, measured in kWh (kilowatt-hour). This unit of consumption is the same as that used by the utility company in calculating fee. The consumption is broken down into 3 categories, i.e. HVAC (heating ventilation and air-conditioning), Lighting & Socket, and Others. The “Daily” graph on the left shows the variation throughout a day on an hourly basis. The “Weekly” graph on the right shows the daily total with category break-down for the past 7 days, the present day value being updated hourly.
“Monthly Electricity Consumption” compares the usage for the past month with that of the same month in the previous year. Together with the top 9 big consumers, the alignment allows easy comparison of performance among different users.
The “Monthly Key Performance Indicators” shows the savings achieved in the previous month, both in energy terms (kWh) and in monetary terms (MOP). The savings is also converted to the equivalent carbon dioxide (CO2) emission that had been avoided.
The last two graphs are shown in EUI (Energy Utilization Index), i.e. total consumption averaged over gross floor area. They give information of the previous month broken down by consumption category (left), and a comparison with the top 3 users on campus (right).