GXP modular geothermal steam turbines (GXP-2B, GXP-2C, GXP-5C, GXP-X)
GXP is a series of modular impulse steam turbines for small and medium geothermal power plants. The series includes the back-pressure GXP-2B and the condensing GXP-2C, GXP-5C and GXP-X rated 10-20 MW. The skid design and a standard layout shorten plant construction time.
- GXP-2B
- back-pressure, single flash, 5-10 bar abs., 150-180 °C, 40-70 t/h
- GXP-2C
- condensing, 1.2-3.5 bar abs., 104-139 °C, 18-31 t/h
- GXP-5C
- condensing, 1.9-7.0 bar abs., 118-165 °C, 25-64 t/h
- GXP-X
- condensing, 10-20 MW, 7.4-9.3 bar abs., 167-177 °C, 80-160 t/h
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The full range of geothermal turbines of the manufacturer includes single-, double-, triple- and four-flow machines for steam pressures from 30 to 430 psi. They are built for dry steam plants, single-, double- and triple-flash plants and for enhanced geothermal systems (EGS). The modular GXP series covers the lower rating range, and the parameters below are given by the manufacturer as typical. Pressure in psi is quoted for the whole range, while for the modular machines the parameters are given in bar abs.
GXP-2B runs back-pressure on single-flash steam at 5-10 bar abs. and 150-180 °C, with steam flow of 40-70 t/h, and the plant occupies 16 × 19 m. The condensing GXP-2C is rated for 1.2-3.5 bar abs., 104-139 °C and 18-31 t/h over an area of 14 × 18 m. GXP-5C accepts 1.9-7.0 bar abs., 118-165 °C and 25-64 t/h, with an area of 28 × 26 m. GXP-X rated 10-20 MW corresponds to the typical range of conventional geothermal plants, runs on 7.4-9.3 bar abs., 167-177 °C and 80-160 t/h and occupies 60 × 40 m. Compared with GXP-5C, this turbine consumes less than twice the steam while producing more than twice the output.
The impulse flow path has high efficiency, is easier to maintain and is less prone to fouling by deposits. The casing has a horizontal split, the rotors are solid forged, there are fewer stages, the nozzles are wide-chord, the blade attachment is proven, and the casings and diaphragms are supported on the axis. The super-rotor technology with special materials and coatings resistant to corrosive steam components extends service life. Plants with such rotors have operated for 10 years and more longer without noticeable corrosion degradation.
The skid design and a standard layout speed up plant commissioning, a high-speed turbine reduces its footprint, and individual blocks are replaced during maintenance. The IoT monitoring and diagnostics system builds a thermal model of the plant and analyzes historical operating data to detect deviations in time and reduce unplanned outages. GXP turbines are installed at small and medium geothermal plants, wellhead units and in the expansion of operating plants.
Technical specifications
| GXP-2B | back-pressure, single flash, 5-10 bar abs., 150-180 °C, 40-70 t/h |
|---|---|
| GXP-2C | condensing, 1.2-3.5 bar abs., 104-139 °C, 18-31 t/h |
| GXP-5C | condensing, 1.9-7.0 bar abs., 118-165 °C, 25-64 t/h |
| GXP-X | condensing, 10-20 MW, 7.4-9.3 bar abs., 167-177 °C, 80-160 t/h |
| Geothermal turbine range | single-, double-, triple- and four-flow; steam pressure 30-430 psi |
| Flow path | impulse type |
Request a price and lead time
GXP modular geothermal steam turbines (GXP-2B, GXP-2C, GXP-5C, GXP-X). We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8406 82 00 00 8406 81 00 00 |
|---|---|
| HS, 6 digits | 8406 82 8406 81 |
| CN (EU) | 8406 82 00 8406 81 00 |
| HTSUS (USA) | 8406 82 10 00 8406 81 10 00 |
| China customs tariff | 8406 82 00 00 8406 81 00 00 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
What steam parameters does GXP-X need?
Typically 7.4-9.3 bar abs., 167-177 °C and a flow of 80-160 t/h. The turbine is condensing, rated 10-20 MW.
How does GXP-2B differ from GXP-2C?
GXP-2B is back-pressure, at 5-10 bar abs. and 150-180 °C, while GXP-2C is condensing, at 1.2-3.5 bar abs. and 104-139 °C. GXP-2B has the higher output, and its plant occupies 16 × 19 m against 14 × 18 m.
How does the turbine resist corrosion by geothermal steam?
The super-rotor technology uses materials and coatings resistant to corrosive components. Plants with it have operated for 10 years and more longer without noticeable degradation.
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