Question 1

Which gas turbines can run on 100% hydrogen today?

Accepted Answer

Several already have. In 2023 a Siemens Energy SGT-400 ran on 100% renewable hydrogen in the EU HYFLEXPOWER project — a world first at industrial scale. GE Vernova's LM6000VELOX aeroderivative is contracted to run on 100% hydrogen at South Australia's Whyalla plant, and its heavy-duty 7HA-class turbines burn 50%+ hydrogen blends today. Mitsubishi Power's M501JAC co-fires ~30% hydrogen now, targeting 100%. So the honest answer is: 100% hydrogen combustion is proven, and commercial 100% units are arriving between 2026 and 2030.

Question 2

What is a hydrogen-ready gas turbine (or hydrogen-ready CCGT)?

Accepted Answer

A hydrogen-ready turbine is engineered from day one to burn variable blends of natural gas and hydrogen and to transition toward 100% hydrogen without replacing the machine. It uses advanced dry low-emissions (DLE) combustion tuned for hydrogen's faster flame speed and higher temperatures. "Hydrogen-ready CCGT" means the same capability in a combined-cycle configuration, where a steam bottoming cycle lifts efficiency above 64%.

Question 3

What is the most efficient combined-cycle gas turbine, and does hydrogen change that?

Accepted Answer

The most efficient thermal power plants are H-class combined-cycle gas turbines, which exceed 64% net efficiency by pairing a gas turbine with a steam turbine that recovers exhaust heat. Running on hydrogen instead of natural gas does not materially lower that efficiency — the same high-efficiency machines are being made hydrogen-capable, so the emissions fall without giving up performance.

Question 4

What does CCGT stand for?

Accepted Answer

CCGT stands for Combined Cycle Gas Turbine. A gas turbine generates power, then its hot exhaust drives a Heat Recovery Steam Generator (HRSG) and steam turbine for a second round of generation — extracting far more energy from the same fuel than a simple-cycle turbine and reaching 60%+ efficiency.

Question 5

Are hydrogen-ready turbines available now, or is this future technology?

Accepted Answer

They are available and shipping now. What is still scaling is the supply of affordable green hydrogen fuel — not the turbines. That is exactly why GRECO specifies hydrogen-ready generation from day one: the plant runs on natural gas or blends today and shifts to hydrogen as clean-hydrogen supply and price improve, with no re-powering.

Question 6

Is a "hydrogen compatible" gas turbine the same as a "hydrogen-ready" one?

Accepted Answer

In marketing material the two are used interchangeably, but they are worth separating. Hydrogen compatible usually means the machine can burn some proportion of hydrogen in a blend — often 30% to 50% — without modification. Hydrogen-ready is the stronger claim: the turbine is engineered so it can be converted to run on up to 100% hydrogen later without replacing it. When you are comparing suppliers, ask for the specific blend percentage the machine is certified for today and what the conversion to 100% actually involves, because the two terms hide a large difference in commitment.

Question 7

What is a hydrogen-ready power plant, as opposed to a hydrogen-ready turbine?

Accepted Answer

The turbine is only one part of it. A hydrogen-ready power plant means the whole facility can make the switch: fuel delivery and storage sized for hydrogen's much lower volumetric energy density, piping and seals rated for a smaller molecule that leaks more readily, revised gas detection and ventilation, and combustion controls tuned for a faster flame. A hydrogen-ready turbine inside a plant that cannot deliver hydrogen to it is not a hydrogen-ready plant. This is why the readiness decision belongs at the campus design stage rather than the equipment order.

Question 8

Does GRECO use turbines on every campus?

Accepted Answer

No — scale decides the machine. Below roughly 20 MW GRECO uses solid oxide fuel cells, which convert gas electrochemically with no flame and therefore near-zero NOx, which is what makes them permittable on urban sites where a turbine would not be. Above roughly 20 MW, combined cycle earns its place because the second steam cycle pays for itself at that size. Either way the heat is recovered and sold into district energy.

수소 대응 복합화력 가스터빈

수소 CCGT의 작동 방식

HRSG 열회수: 90% 효율 달성

업계의 주요 이정표

HYFLEXPOWER, 100% 수소 달성

GE Vernova Whyalla 계약

Mission H2 Power 출범

상용 100% H₂ 운전

선도 기술 공급사

GE Vernova

Siemens Energy

Mitsubishi Power

Greco Energy의 접근 방식

출처 및 더 읽을거리

GE Vernova LM6000VELOX 100% 수소 발표

HYFLEXPOWER: 100% 수소로 운전한 최초의 가스터빈

Siemens Energy 수소 발전소

Mission H2 Power: 100% 수소 HL 가스터빈 개발

백서: Siemens Energy 가스터빈을 이용한 수소 발전

수소 가스터빈: 자주 묻는 질문

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