Geothermal Use in New Zealand

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1 Geothermal Use in New Zealand An overview of New Zealand s Geothermal Science and Engineering Expertise Greg Bignall Wairakei Research Centre, Taupo

2 New Zealand s Geothermal Resources Abundant resources 1010 MWe base load generation ~17% of total generation 4 th in World for installed geothermal electricity generation capacity Increased uptake of direct heat (esp. GSHP) Future? GWe planned ~ +1 GWe available ~ 1.6 GWe protected 2

3 New Zealand Electricity Generation Energy Demand Agriculture Commercial Industrial Residential Annual Electricity Generation Hydro Gas Coal Wind Geothermal 3

4 Geothermal Power Developments Steam Condensing Nga Awa Purua Rotokawa phase Hybrid Binary Mokai 1999 / 2005 / phase Binary Ngatamariki 2013 Steam turbine / Water Binary Wairakei 1958 / 2005 Steam Condensing Pohipi 1996 Examples of Geothermal Power Generation Within New Zealand 4

5 Industrial Direct Heat Applications Wairakei - Tauhara Kawerau Mokai 5

6 Māori Participation in Geothermal Projects Members of Te Kapa Haka o Te Whanau-a- Apanui. Credit: Martin Hunter / Getty 6

7 Case Studies Raising Awareness GNS Earth Energy in your browser 7

8 Characterisation Greenfield Development Cycle Community Exploration 8 Development Activity

9 Application of Geothermal Science Integration of multidisciplinary/variously sourced geoscience data Apply geoscience expertise to promote, guide/support development Recognition of geological hazards or barriers to development Support decision-making to reduce financial or development risk 9 Conceptual (hypothetical) Model Field Development Model

10 Innovative Science and Engineering Conceptual Understanding New Zealand drilling expertise science interpretation & scenario modelling Soengkono (unpubl) Numerical modelling B Drilling Expertise Surveys Geoscience 10

11 Geothermal Research 3 environmentally sustainable growth in geothermal electricity generation, including utilisation of the deep (3-7 km) resources, an increase in direct applications, and new industries leveraged from geothermal resources. Key elements of success : Innovative problem solving Government-funded research Sophisticated analytical tools / facilities Strong Industry Researcher Iwi relationships Sustainable Development System Characterisation and Science Drilling Environmental Effects Low Enthalpy Systems 11

12 Other developments / innovation Hazards regulations : new Health and Safety Act came into effect April 2016 Geoheat Strategy out for public comment by 31 st May NZS2403:2015 Code of Practice for Deep Geothermal Wells Resulting from industry cooperation, this is an international best practice reference. It can be purchased from Standards New Zealand. 39 th New Zealand Geothermal Workshop is 22 rd -24 th November 2017, in Rotorua. 12

13 Geothermal Education / Training Post Graduate Courses - Geothermal Institute Univ. Auckland Technical Training Programmes NZAid/MFAT Basic and advanced geothermal training (e.g. at Gadjah Mada University by GNS and UoA). 13

14 Dr. Greg Bignall Wairakei Research Centre Taupo, NEW ZEALAND Thank you

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