Energy Audit Presentation

The building consists of a library, a museum, a performance space and a café Uses natural gas and electricity as its main sources of purchased energy HVAC Operation System include: • 500kW Boiler • 4 main Pumps • 4 Air Handling Units

The library has its own HVAC system mainly for cooling and ventilation

Energy Source

Annual Usage (kWh/yr) Average Price (c/kWh)

Annual Cost ($)

406,656

3.61 (energy + fixed charges)

14,689

Electric Energy

650,008

12.54 (energy + fixed charges)

81,519

Total

1,056,664

Natural Gas

annual use

9.10 96,208

annual cost

The Energy Use Index: 176 kWh/m2.yr

Historic gas use is plotted from Jan 05-Dec 07as the average kWh/day:

Load Profiles for February 2007:

Load Profiles for July 2007

From the load profiles energy demand increases during the winter month compared to the summer month. Breakdown of annual electricity consumption by area:

Building Management System (BMS) monitored by Aquaheat.

Gas and electricity invoices managed by Energy and Technical Services (ETS).

Maintenance program is planned and in place. During the recent maintenance check it was found that: • AHU2 humidifier set points were very tight between 47-49% • AHU1 humidifier was drawing current but was not producing any steam • AHU3 humidifier needs to be replaced

In general, the building is well managed and has a focus to be energy efficient.

Recommendations are provided through observations which need to be further investigated in order to provide potential energy savings in dollar terms • In the library where desks are placed, the space is very well daylit. Light levels in this space are extremely high (1200-2000 lux). Artificial lighting is not needed during a sunny day. • In the pacific and the magazine section, indoor flood lights are mounted on the ceiling which do not provide any illumination to the work desks or the shelves. Simply turning them off could have an impact on the annual energy costs.

• Replace Lamps with new energy saving lamps

• The museum uses the most of the electrical energy (approx 55%). It is recommended that further assessments should be taken as to why the museum is consuming so much energy. • Services should be regularly maintained and repaired. • The BMS needs to be properly configured, monitored and maintained.

• On contract renewal, spot market prices should be considered which could save annual costs.