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Organic rankine cycle (geothermal)
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Technology Description
Organic Rankine cycle (ORC) is one cycle option to use low-temperature geothermal resources, typically operating with temperatures varying from as low as 73°C to 180°C. The heat is recovered from the geothermal fluid using heat exchangers to vaporise a working fluid with a low boiling point (butane or pentane) and drive a turbine.
Relevance for Net Zero
Enables the use of low-temperature heat sources, but deployment opportunities depend on local potential.
Key Countries
Croatia, Japan, Nicaragua, Portugal, Germany, Honduras, Chile, Guatemala, Philippines, Costa Rica, Kenya, Indonesia, New Zealand, Türkiye, United States
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