The 100-MW Ngatamariki Geothermal Power Station: A Purpose-Built Plant for High Temperature, High Enthalpy Resource
- Key words
- Ngatamariki; geothermal; Organic Rankine Cycle; binary; power cycle; ORC; New Zealand
- Location
- Ngatamariki, New Zealand; Taupo Volcanic Zone
- Conference
- Geothermal Resources Council Transactions
- Year
- 2014
- Session
- Power plant design and operation; Binary cycle power generat
- Language
- English
Abstract
Successfully and sustainably tapping high temperature geothermal reservoirs at around 300 ?C at 3000 meters below the ground, requires a very special expertise: a delicate blend of precision multi- disciplinary engineering, mastering technological manufacturing and a dedicated field-proven geothermal experience and knowhow. Some authors have suggested over the years that pure binary systems have a low-efficiency conversion rate and are best suited in the utilization of boiling low-temperature reservoirs. In contrast to those suggestions, several medium-sized geothermal power stations such as the 30-MW Te Huka, 36-MW Rotokawa, 12-MW Kawerau KA 24, and the 30-MW Ngawha are well established examples of high-temperature binary systems operating successfully and sustainably in New Zealand.
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