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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. Toshiba continues to work toward the reduction of carbon dioxide emissions by utilizing Geothermal power generation technologies 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 wants and needs.

60+ Units • 3791 Megawatts • Over 25 Countries, Since 1966

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.

Key Features, Technology & Benefits

1

Small Footprint

  • Size reduction due to high speed turbine.
  • Reduced redundancy for equipment.
BenefitSmaller installation area.
2

Robust & High Reliability

  • Impulse design.
  • Special material for rotating parts & anti-scaling technology.
BenefitStable operation for long time & increase in revenue.
3

Early Completion

  • Simple skid type design & standard design.
BenefitEarly revenue.
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 Product Line-up

GXP-2B

GXP-2B
0
2
4
6
8
10
20
STG OutputSTG Output [MW]
Features Back pressure type
Steam Resource Single flash
Main Steam Pressure *1 5 to 10 bara
Main Steam Temperature *1 150 to 180°C
Main Steam Flow *1 40~70 t/h
Power Plant Area 16m x 19m = 304m 2 *2

GXP-2C

GXP-2C
0
2
4
6
8
10
20
STG OutputSTG Output [MW]
Features Condensing type
Steam Resource Single flash
Main Steam Pressure *1 1.2 to 3.5 bara
Main Steam Temperature *1 104 to 139°C
Main Steam Flow *1 18~31 t/h
Power Plant Area 14m x 18m = 252m 2

GXP-5C

GXP-5C
0
2
4
6
8
10
20
STG OutputSTG Output [MW]
Features Condensing type
Steam Resource Single flash
Main Steam Pressure *1 1.9 to 7.0 bara
Main Steam Temperature *1 118 to 165°C
Main Steam Flow *1 25~64 t/h
Power Plant Area 28m x 26m = 728m 2

GXP-X

GXP-X
0
2
4
6
8
10
20
STG OutputSTG Output [MW]
Features Condensing type
Steam Resource Single flash
Main Steam Pressure *1 7.4 to 9.3 bara
Main Steam Temperature *1 167 to 177°C
Main Steam Flow *1 80~160 t/h
Power Plant Area 60m x 40m = 2,400m 2 *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.

With our proven and exclusive technologies, Toshiba has been able to successfully design geothermal turbines that are based on a high efficiency-oriented design, cover wide capacity ranges. In addition, Toshiba can enhance performance of existing sites through complete steam path retrofits. These upgrades offer performance improvements and enhance anti-erosion/corrosion capacity with less chance of stress corrosion cracking than previous designs by other OEMs.

The Impulse Steam Path design used in Toshiba’s power plants has been proven to be the most suitable solution for Geothermal plants, as it 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.

Impulse Steam Path

Trust Toshiba to deliver first-class geothermal solutions to meet your critical energy needs. Let's build a better future, together!

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