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Geothermal Energy Annual Report 2004

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Geothermal Energy Annual Report 2004 ( geothermal-energy-annual-report-2004 )

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1) 2) Locality Wairakei Wairakei Wairakei Ohaaki Kawerau Kawerau Rotokawa Northland Mokai OP = operating HP= high pressure IP = Intermediate pressure LP = Low pressure OPr =operating at <60% B = Binary (Rankine Cycle) H = Hybrid (BP steam & B) UC = under construction BP = back pressure steam C = Condensing Steam III. NATIONAL ACTIVITIES NEW ZEALAND In 2004, four new production wells and one reinjection well were drilled in Mokai and Rotokawa, adding to the four drilled in 2003. Three exploration wells were also drilled at Putauaki, Kawerau. Geothermal energy contributed about 7% towards the national total demand, with hydro providing 60%, wind and biomass 1.5%, cogeneration 1.5% and coal and gas 30%. 15.4.2 Rates and Trends in Development Development has been steady with a small growth in capacity, driven partly by current prices and partly by industry positioning for future fossil fuel price increases, the Kyoto agreement on CO2 emission reductions, and vulnerability to hydro shortfall in dry years. Table 15.1 Utilization of geothermal energy for electricity power generation in New Zealand in 2004. Power Year No. Status1) Type Plant of of Unit Rating (MWe) 2 x 11.2 1x5 4x 11.2 3 x 30 3x5 1 x 55 2x 11.2 2x46 1x10 Total Installed Capacity (MWe) Annual Under Name Com- missioned Wairakei 1958-63 Units Unit2) Energy Constr. or 2003/4 Planned (GWh/yr) (MWe) 15 15 10 OP 3UC 2 IP - BP 1 LP - BP 4 LP - C 3 IP - C B 1 IP -C 2 HP BP 2IPC 1BP B H B B B H B H,B 162 1290 55 215 114 300 10 80 6 50 Poihipi Tauhara Ohaaki Tasman P&P Kawerau Binary Rotokawa Ngawha Mokai 1996 1 1989 4 1966 1 1990 3 1997 1 1997 3 2003 1 1998 2 1999 7 OPr OPr OP OP OP OP OP OP OP UC 3X2 1x12 3x4.5 1x4.5 2x4.5 1 x 25 6x5 55 470 31 290 9 79 Total 452 2774 70 40 IEA Geothermal R&T Annual Report 2004.doc 92

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