7 minutes, 5 slides, 2 case studies - The how and why of geoexchange heating and cooling explained as briefly as can be.

1. Geoexchange Heating and Cooling –
The Opportunity in South Australia
Prepared by:
Yale Carden, Managing Director
GeoExchange Australia Pty Ltd
2 July 2014
Phone: 02 8404 4193
www.geoexchange.com.au
enquiries@geoexchange.com.au
Offices in Sydney and Adelaide
Geoexchange Accredited Installer Network (GAIN): Australia wide

2. Why Geoexchange?
 Climate Suitability: Does it work in South Australia?
 New or Retrofit Buildings?
 Residential or Commercial Buildings?
 Are Rising Energy Costs of Concern?
 Are Life Cycle Costs Important?
 Multiple Building Types and Uses
 Potential for Ongoing Revenue with Utility Application
 Qualitative Benefits: eg comfort, aesthetics, noise, plant space
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3. What is Geoexchange?
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Air Temperature:
Winter: 4 C
Summer: 38 C
Ground Temperature:
Winter: 18 C
Summer: 18 C

4. Case Study: Mixed Use Block
 Commercial, Retail and Residential:
 Geoexchange as Utility
 Site Peak Load: 1720 kW Site Diversified Load: 1040 kW
 Common District Vertical Ground Loop for all buildings
 No gas required
 Simple Payback in Year 4 with annual savings:
 390 000 kWh
 515 tCo2e
 $93 000 (energy)
 $235 000 (all costs)
 ~1500 kL of water
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5. Case Study: Tumut Council, NSW
 Direct electricity savings: $116 475 ex GST (66 %);
 Electricity demand reduction: 151 kVA (75 %) – Geoexchange up to 40 %
 Heating: electric elements evolved to GSHP with certified COP > 5
 Cooling: large, noisy, air sourced chiller evolved to GSHP with certified COP ~11
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6. Case Study: Tumut Council, NSW
 Direct electricity savings: $116 475 ex GST (66 %);
 Electricity demand reduction: 151 kVA (75 %) – Geoexchange up to 40 %
 Heating: electric elements evolved to GSHP with certified COP > 5
 Cooling: large, noisy, air sourced chiller evolved to GSHP with certified COP ~11
Green Building Technology Showcase