Australian Geological Survey Offices - Canberra - Australia

The Geoscience Australia (GA) Building is a purpose built geological research facility situated in Canberra. The facility consists of general office and open plan accommodation, laboratories, public and educational displays, and special storage facilities for its vast collection of scientific data, rock, mineral and core samples.

 

The building incorporates a number of Ecological Sustainable Development (ESD) design principles. One of the key ESD features is the Geothermal Heat Pump system used for the office accommodation. The system offers the following advantages:

  • reduced energy requirement;
  • lower capital cost;
  • reduced peak energy demand;
  • reduced annual energy consumption;
  • greater 'after-hours' flexibility; and,
  • closed loop system requiring minimal water treatment

The geothermal system is meeting all the key performance indicators for achieving energy efficiency. The building energy use is monitored on 24/7 basis and regular energy and building conservation audits are conducted. A review of the system undertaken with Geoexchange Australia in 2008 (10 Year Performance Review) found a number of post design and maintenance issues that have been addressed resulting in improved performance. Geoexchange Australia continues to provide GA with technical advice and assistance with the maintenance of the geothermal system and any efficiency issues with design and operation.

 

If you would like to know more about Geoscience Australia, the building and it’s design features please visit our website: www.ga.gov.au/about-us/our-facilities/our-building.html.

 

Stephen Read

Property Manager

Corporate Branch

Geoscience Australia


SYSTEM COMPARISON - Geoexchange Vs Conventional

GEOEXCHANGE
     

Building Area:

 

19 000 square metres


System Capacity:

 

2.5 M Watts


Equipment:

 

230 WaterFurnace Premier AT heat pumps of varying capacities


Ground Loops:

 

350 x 104 metre x 32 mm loops connected by 50 x 50 mm headers


Pumping:  

Common pumping via variable speed pumping station.


CONVENTIONAL PLANT
     

Capital Cost:

 

Additional $500,000.00*

Operating Cost:

 

$15.00/sqm compared to $4.50/sqm for Geoexchange

Annual Operating Cost:

 

Additional $199,500.00

Pay-back:

 

Immediate

 

* Original conventional plant design incorporated a stand-by chiller/boiler plant (full capacity), if this had not been costed into the design, there would have been a two year payback.

Other Advantages:

  • Modular plant
  • Long equipment life
  • Can operate minimum plant for areas required 
  • Minimal Maintenance
  • No outdoor equipment 
  • Minimal plant room
  • Reduced CO2 emissions