101 Miller Street, Sydney

101 Miller StreetCogent Energy has designed and installed a state of the art cogeneration plant at 101 Miller Street, North Sydney. The building is the largest commercial building in North Sydney and comprises premium office space and retail shops. This is the largest cogeneration plant in a commercial tower in Australia.

Building Owner: Mirvac
Location: North Sydney
Building Description: Commercial complex – premium offices & retail plaza
Building Size: 40,000 sqm
Plant Operational Date: In operation since 1 November 2008

Cogeneration Configuration

The 101 Miller Street cogeneration plant comprises 2 x 1,166 kW MTU 4000 series cogeneration engines that are connected in parallel to the grid. Each engine is coupled to a 750 kW Thermax exhaust absorption chiller. The absorption chillers are fully integrated into the building’s chilled and condenser water systems.

The plant is set up to operate either in grid parallel import or island mode and operates automatically during the peak and shoulder demand periods.

Plant Capacities

Peak Electrical: 2,332 kW at 0.8 power factor
Peak Cooling: 1,500 kW
Energy Efficiency: 80% (estimated)


Reliability: Highly reliable parallel cogen solution with grid parallel import
Energy Efficiency: 5 star NABERS and 5 star Green Star
Sustainability: Saving of up to 6,000 tonnes of CO2 per annum.