8 November 2012 — UPDATED Michael Drapac’s Drapac Group has cemented its credentials as a sustainability outperformer with its office fit out of a former brewery laboratory scoring a  for the Environment Protection Authority Victoria achieving a 6 star Green Star Office Interiors v1.1 from the Green Building Council of Australia.

It is the first government tenancy in Victoria to achieve the rating and one of only 10 6-star Green Star – Office Interiors v1.1 in Australia.

The building, known as 200 Victoria Street, in Melbourne, was a derelict former brewery laboratory. It is now tenanted by the EPA over five floors; there are three retail tenants and one whole floor remains vacant.

Drapac appointed Peddle Thorps Architects and building services consultants Aurecon to provide engineering, mechanical, electrical, fire protection, hydraulic, acoustics and sustainability consulting.

Aurecon mechanical and ESD engineer Rebecca Breuer said the rating recognised a multidisciplinary effort with teams from Aurecon, Woods Bagot, Hansen Yuncken and Montlaur Project Services involved.

“The certification can be attributed not just to the innovative sustainability initiatives built into the design, but also to the thoroughness of the project team in preparing their documentation to be presented for the Green Star rating submission for assessment,” she said.

Key features of the sustainable fit out include increased ventilation rates above the Australian standard, flexible lighting control incorporating motion control and daylight linking.

Other initiatives included hollowing out the light filled atrium, mapping natural sunlight into work spaces, selecting materials sourced or produced responsibly by manufacturers, improving air quality through reduced emissions and using videoconferencing and transport initiatives to reduce travel and greenhouse gas emissions.

Base building ESD consultant Umow Lai was responsible for devising the 6 star Green Star Office strategy, including sustainable design, modelling and liaison with Cogent Energy for the trigeneration scheme.

The whole building trigeneration approach supplies both the base building and tenancies with low carbon energy and was key to the achievement of the EPA’s 6 star Green Star Office Interiors and 5.5 star NABERS Tenancy Energy ratings, a spokesman from Umow Lai said.

It is understood that Murchie Consulting Engineers were the base building services consultants, integrating the Cogent Energy trigeneration system into the base building services.

The development also achieved a 5.5 star NABERS tenancy rating with the architect Peddle Thorps Architects.

Energy
Cogent Energy designed and installed a state-of-the-art trigeneration plant at 200 Victoria Street, Melbourne.

The  trigeneration plant comprises of a 386kW MTU Series 400 natural gas fired engine that is connected in parallel to the grid. The engine is coupled to a 290 kW Thermax exhaust absorption chiller and a 230kW heating water heat exchanger.

The facility is fully integrated into the building’s chilled, heating and condenser water systems.The plant is set up to operate either in grid parallel export or island mode and operates automatically during the peak demand periods or during grid outages as emergency backup.

Plant Capacities

  • Peak Electrical: 386 kW at 0.8 power factor
  • Peak Cooling: 290 kW cooling / 230kW heating
  • Energy Efficiency: 80 per cent overall efficiency (estimated) when compared to grid electricity

Benefits

  • Energy Efficiency: Building Targets – 5 star NABERS and 6 star Green Star
  • Backup: Provides emergency backup if grid connection fails
  • Sustainability: Estimated savings of up to 950 tonnes of CO2 per annum