Combined cycles

This invention describes a power system that combines a gas turbine with a clever way to use its fuel. Before burning, a very cold fuel is first pumped, heated by the gas turbine's exhaust, and then expanded through its own turbine to generate extra power. This pre-heated, expanded fuel is then reheated by the gas turbine's exhaust again before finally being burned in the gas turbine, making the whole system more efficient by recovering waste heat.

Why it matters: The global push for decarbonization and the increasing focus on high-efficiency power generation using alternative, often cryogenic, fuels like hydrogen or LNG, has intensified since 2023. This makes advanced combined cycles that maximize energy recovery from such fuels more economically and environmentally attractive.

Status: Not in forceListed as no longer active. The specific reason is not in the record we hold.
How hard to build: SpecializedGas turbine, cryogenic fuel system, high-temperature heat exchangers.

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