Energy Consumption

The LEO Building has been monitored since October 2004. One year of monitored data is currently available covering the period from 1.January 2005 to 31 December 2005. The average chilled water consumption was 2,014 tonh/day and the average electricity consumption was 4,532 kWh/day. The tonh refrigerant value can be converted into an equivalent amount of electricity by using a conversion factor of 0.72 (chiller COP of 4.8) and the total monitored energy consumption was then 6,000 kWh/day. The monitored building energy index (BEI) based on total energy consumed in the building is 114 kWh/m² per year, based on an air-conditioned area of 19,237 m² and actual operation of 2,930 hours in the first year of monitoring.

Energy Data in 2005 (Chiller Plant COP 4.8)

The energy for cooling represents 45%, lighting 21% and equipment 34% of the total energy consumption of the building. In comparison, results from a study conducted by Pusat Tenaga Malaysia in 2003 on government buildings based on conventional design reveal that energy consumption is typically 62% air-conditioning, 18% lighting and 20% plug loads.

Energy Consumption By Load Aportionin

The monitored energy consumption and BEI in January, October, November and December were lower than the other months due to the lower operational hours (lower occupancy rate due to festive seasons), and the solar gain was also lower during these months, resulting in the reduced energy consumption.