Geothermal Power Solutions
Clean, Safe and Renewable: Geothermal Power Generation
Geothermal power generation will be one of the key elements in achieving “Carbon Neutrality.” By creating one of the world’s most advanced Geothermal Energy systems with proven and innovative technology, Toshiba is stepping forward globally to help conserve fossil fuels and contribute to the diversity of energy sources.
With our proven and exclusive technologies, Toshiba has been able to successfully design geothermal turbines that are based on a high efficiency-oriented design and cover wide capacity ranges.
Toshiba’s Proven & Exclusive Geothermal Technologies
Our patented and trusted Geothermal solutions come with an array of benefits including size reduction, high reliability, early completion, simple and easy maintenance, and excellent operations that allow for real time monitoring. Each system provides different solutions according to a customer’s requirements.
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Key Features and Benefits
1
Robust & High Reliability
- Impulse design.
- Special material for rotating parts & anti-scaling technology.
BENEFITStable operation for long time & increase in revenue.
2
Early Completion
- Simple skid type design & standard design.
BENEFITEarly revenue.
3
Small Footprint
- Size reduction due to high speed turbine.
- Reduced redundancy for equipment.
BENEFITSmaller installation area.
4
Simple & Easy Maintenance
- Individual skid replacement.
BENEFITIncreased plant availability.
5
Excellent Operation Support: IoT Solutions
- Real Monitoring and Diagnostic system.
- Plant thermal model build-up.
- Analysis of historical healthy data.
BENEFITSustainable performance & reduction of unplanned outages.
Geothermal Steam Turbine Lineup
Utilizing high-efficiency impulse technology, Toshiba’s geothermal steam turbines are available in various turbine types:
- Single, double, triple and four flow configurations
- Steam pressures from 30 to 430 psi
- Dry steam plants
- Single, double, and triple-flash systems
- Hot dry rock, enhanced geothermal systems
GXP-2B
STG Output [MW]
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FeaturesBack pressure type
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Steam ResourceSingle flash
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Main Steam Pressure *15 to 10 bara
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Main Steam Temperature *1150 to 180°C
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Main Steam Flow *140~70 t/h
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Power Plant Area16m x 19m = 304m ²*²
GXP-5C
STG Output [MW]
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FeaturesCondensing type
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Steam ResourceSingle flash
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Main Steam Pressure *11.9 to 7.0 bara
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Main Steam Temperature *1118 to 165°C
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Main Steam Flow *125~64 t/h
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Power Plant Area28m x 26m = 728m²
GXP-2C
STG Output [MW]
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FeaturesCondensing type
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Steam ResourceSingle flash
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Main Steam Pressure *11.2 to 3.5 bara
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Main Steam Temperature *1104 to 139°C
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Main Steam Flow *118~31 t/h
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Power Plant Area14m x 18m = 252m²
GXP-X
STG Output [MW]
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FeaturesCondensing type
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Steam ResourceSingle flash
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Main Steam Pressure *17.4 to 9.3 bara
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Main Steam Temperature *1167 to 177°C
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Main Steam Flow *180~160 t/h
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Power Plant Area60m x 40m = 2,400m²*³
- *1 : Typical range
- *2 : STG output of GXP-2B is higher than that of GXP-2C. Therefore, the power plant area of GXP-2B is larger than that of GXP-2C.
- *3 : GXP-X can cover 10-20 MW, which is the capacity range for conventional geothermal power plants in general, meaning that the product pursues performance to maximize cost-effectiveness for the customer’s revenue. This is a different concept from GXP-2B/2C/5C. GXP-X can produce more than double the output of GXP-5C whilst consuming less than twice the steam flow required by GXP-5C.
Impulse Steam Path Design
The Impulse Steam Path design is highly efficient, easier to maintain, and has less clogging caused by scaling. High reliability and design are achieved through our unique design and construction features such as: horizontal split casing, proven blade fixtures, solid rotors, robust blades, fewer stages, wide chord nozzles, and true centerline support of casings and nozzle diaphragms.
Advanced Super Rotor Technology
Geothermal plants experience deterioration of turbine generators over time. Toshiba had developed a unique super rotor technology that extends the life and reliability of the turbine by devising the material and coating to make it resistant to corrosive components and damage. Plants that have implemented this technology have be able to operate over 10+ years longer with no significant performance degradation from corrosion.