# Gas turbines and combined cycle: Equipment and suppliers Superalloy blades, steam boilers and generators in one block Source page: https://www.materialinsights.org/energy/e_gas_turbines/equipment/ What this tab covers For each method, the main pieces of equipment, who makes them (by region) and what they are made of (bill of materials). A combined-cycle block is a gas turbine, a heat recovery steam generator, a steam turbine and one or more generators; a peaker is just the gas turbine and generator; a jet engine adds a fan. #### Combined-cycle gas plant **Heavy-duty gas turbine**^[1](https://netl.doe.gov/sites/default/files/netl-file/21UTSR_Gulen.pdf)^[2](https://www.powermag.com/ge-ha-turbine-snags-another-world-record-for-ccgt-efficiency)^[5](https://www.lazard.com/media/uounhon4/lazards-lcoeplus-june-2025.pdf)^[6](https://www.utilitydive.com/news/ge-vernova-gas-turbine-backlog-climbs-to-116-gw/826039/)^[7](https://www.turbomachinerymag.com/view/gas-turbine-market-report-2024-posts-highest-units-mws-in-22-years)^[9](https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-rhenium.pdf)^[16](https://www.mhi.com/finance/library/business/pdf/2025_gtcc_summary.pdf)^[26](https://www1.hkexnews.hk/listedco/listconews/sehk/2026/0331/2026033103547.pdf) Compresses air, burns gas and expands the gas to drive the generator; produces about two thirds of the block's output. United States GE Vernova Europe Siemens Energy Japan and Korea Mitsubishi Power, Doosan Enerbility China Dongfang Electric Bill of materials - **Hot-section blades and vanes**: single-crystal nickel superalloys (some with rhenium) with internal cooling and thermal barrier coatings - **Combustors**: nickel alloys, some made by additive manufacturing - **Turbine as share of plant**: about USD 950/kW of a USD 2,500/kW plant about 38% (calculated) **Heat recovery steam generator (HRSG)**^[1](https://netl.doe.gov/sites/default/files/netl-file/21UTSR_Gulen.pdf)^[20](https://www.koreatimes.co.kr/business/companies/20260910/mico-completes-nem-energy-acquisition-amid-ai-driven-gas-power-boom)^[19](https://johncockerill.com/en/press-and-news/news/second-position-hrsg-market-mccoy-report/)^[21](https://cicgroup.com/nooter-eriksen/newsroom/) Boiler heated by the turbine exhaust (about 650 C) that raises steam at several pressures for the steam turbine. Europe NEM Energy (Netherlands; Korean-owned since 2026), John Cockerill (Belgium) United States Nooter/Eriksen Bill of materials - **Finned tube bundles**: carbon and alloy steel **Steam turbine**^[1](https://netl.doe.gov/sites/default/files/netl-file/21UTSR_Gulen.pdf)^[2](https://www.powermag.com/ge-ha-turbine-snags-another-world-record-for-ccgt-efficiency)^[12](https://www.siemens-energy.com/global/en/offerings/power-generation/generators.html)^[25](https://www.turbomachinerymag.com/view/per-supplier-contract-doosan-enerbility-to-equip-qatari-combined-cycle-plant) Expands the recovered steam; provides about one third of output. United States GE Vernova Japan and Korea Toshiba, Doosan Enerbility Europe Siemens Energy Bill of materials - **Rotor and blades**: alloy steel forgings **Generator**^[2](https://www.powermag.com/ge-ha-turbine-snags-another-world-record-for-ccgt-efficiency)^[12](https://www.siemens-energy.com/global/en/offerings/power-generation/generators.html)^[15](https://www.gevernova.com/gas-power/products/generators/air-cooled) Turns shaft power into electricity at up to 98.9% efficiency (air-cooled, up to 400 MVA). United States GE Vernova Europe Siemens Energy Japan and Korea Toshiba Bill of materials - **Stator**: copper windings in laminated electrical steel - **Cooling**: air, hydrogen or water depending on size #### Open-cycle / peaker plant **Aeroderivative gas turbine**^[6](https://www.utilitydive.com/news/ge-vernova-gas-turbine-backlog-climbs-to-116-gw/826039/)^[7](https://www.turbomachinerymag.com/view/gas-turbine-market-report-2024-posts-highest-units-mws-in-22-years) Lightweight turbine derived from a jet engine, quick to start and cycle. United States GE Vernova, Baker Hughes Europe Siemens Energy, Rolls-Royce Japan and Korea Mitsubishi Power Rest of world UEC (Russia) Bill of materials - **Hot section**: nickel superalloys - **Price**: about USD 1,800/kW (analyst estimate) #### Jet engines **High-bypass turbofan**^[8](https://www.nationalacademies.org/read/23490/chapter/6)^[10](https://www.sec.gov/Archives/edgar/data/40545/000004054526000005/ge4q2025earningsrelease.htm)^[11](https://www.rtx.com/news/news-center/2026/01/27/rtx-reports-2025-results-and-announces-2026-outlook) Core gas turbine driving a large fan for thrust. United States CFM International (with Safran, France), Pratt & Whitney Europe Rolls-Royce Bill of materials - **Turbine blades**: nickel superalloys; 20-30% of core air is used for cooling - **Hot-section liners and shrouds**: ceramic matrix composites rated about 1,200-1,300 C #### Sources 1. [Gas Turbines: Past, Present and Future (Efficiency Focus), S.C. Gulen, UTSR Project Review Meeting](https://netl.doe.gov/sites/default/files/netl-file/21UTSR_Gulen.pdf) US DOE National Energy Technology Laboratory, 2021 2. [GE HA Turbine Snags Another World Record for CCGT Efficiency](https://www.powermag.com/ge-ha-turbine-snags-another-world-record-for-ccgt-efficiency) POWER Magazine, 2018 3. [Lazard's Levelized Cost of Energy+ (LCOE+), June 2025](https://www.lazard.com/media/uounhon4/lazards-lcoeplus-june-2025.pdf) Lazard, 2025 4. [GE Vernova gas turbine backlog climbs to 116 GW](https://www.utilitydive.com/news/ge-vernova-gas-turbine-backlog-climbs-to-116-gw/826039/) Utility Dive, 2026 5. [Gas Turbine Market Report: 2024 Posts Highest Units, MWs in 22 Years](https://www.turbomachinerymag.com/view/gas-turbine-market-report-2024-posts-highest-units-mws-in-22-years) Turbomachinery International, 2025 6. [Commercial Aircraft Propulsion and Energy Systems Research, Chapter 3: Aircraft Gas Turbine Engines](https://www.nationalacademies.org/read/23490/chapter/6) National Academies of Sciences, Engineering, and Medicine, 2016 7. [Mineral Commodity Summaries 2026: Rhenium](https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-rhenium.pdf) US Geological Survey, 2026 8. [GE Aerospace fourth quarter and full-year 2025 earnings release (Form 8-K)](https://www.sec.gov/Archives/edgar/data/40545/000004054526000005/ge4q2025earningsrelease.htm) GE Aerospace / US SEC, 2026 9. [RTX reports 2025 results and announces 2026 outlook](https://www.rtx.com/news/news-center/2026/01/27/rtx-reports-2025-results-and-announces-2026-outlook) RTX, 2026 10. [Generators for power generation (product overview and references)](https://www.siemens-energy.com/global/en/offerings/power-generation/generators.html) Siemens Energy, 2025 11. [Air-cooled generators (GEN-A)](https://www.gevernova.com/gas-power/products/generators/air-cooled) GE Vernova, 2025 12. [GTCC business summary 2025 (investor presentation; market data from McCoy Power Reports)](https://www.mhi.com/finance/library/business/pdf/2025_gtcc_summary.pdf) Mitsubishi Heavy Industries, 2025 13. [John Cockerill, second world supplier of HRSGs with 20% of market shares according to the McCoy report](https://johncockerill.com/en/press-and-news/news/second-position-hrsg-market-mccoy-report/) John Cockerill, 2024 14. [MiCo completes NEM Energy acquisition amid AI-driven gas power boom](https://www.koreatimes.co.kr/business/companies/20260910/mico-completes-nem-energy-acquisition-amid-ai-driven-gas-power-boom) Korea Times, 2026 15. [Nooter/Eriksen newsroom (HRSG aftermarket and services)](https://cicgroup.com/nooter-eriksen/newsroom/) CIC Group, 2025 16. [Doosan Enerbility to equip Qatari combined-cycle plant (Facility E)](https://www.turbomachinerymag.com/view/per-supplier-contract-doosan-enerbility-to-equip-qatari-combined-cycle-plant) Turbomachinery International, 2025 17. [Dongfang Electric Corporation Limited: Annual results announcement for the year 2025](https://www1.hkexnews.hk/listedco/listconews/sehk/2026/0331/2026033103547.pdf) Dongfang Electric (HKEX filing), 2026 ## Other sections - [Summary](https://www.materialinsights.org/energy/e_gas_turbines/index.md) - [Overview](https://www.materialinsights.org/energy/e_gas_turbines/overview/index.md) - [Correlation](https://www.materialinsights.org/energy/e_gas_turbines/correlation/index.md) - [Science and limits](https://www.materialinsights.org/energy/e_gas_turbines/science/index.md) - [Value chain](https://www.materialinsights.org/energy/e_gas_turbines/valuechain/index.md) - [Unit economics](https://www.materialinsights.org/energy/e_gas_turbines/economics/index.md) - [Engineering methods](https://www.materialinsights.org/energy/e_gas_turbines/methods/index.md) - [Relationships](https://www.materialinsights.org/energy/e_gas_turbines/links/index.md)