Hydrogen turbine sets record without compressor

On August 4, 2026, researchers at the Karlsruhe Institute of Technology (KIT) operated a new gas turbine without a compressor for 303 seconds, setting a record that surpasses NASA's previous record of 250 seconds. The experiment confirms advances in generating energy from hydrogen, a fuel that can be derived from renewable sources.

Record for compressor-free operation

The test achieved more than five minutes of continuous operation, far beyond previous experiments that lasted fractions of a second due to the risk of combustion-chamber blowout. The success shows that the turbine can remain stable for a significant period, paving the way for practical applications.

How pressure-gain combustion works

The turbine uses what is called pressure-gain combustion, where detonation waves form due to mechanical instability of the gas flows, generating wave patterns and vortices that raise the pressure directly in the combustion chamber. This mechanism eliminates the need for a mechanical compressor to increase air pressure before burning.

Advantages of eliminating the compressor

By removing the compressor, the turbine reduces energy losses that, in conventional turbines, can consume about 50 % of the generated power just for air compression. Fewer moving parts also mean lower maintenance costs and a potential increase in overall efficiency.

Potential applications of the hydrogen turbine

Although the system can operate with different fuels, hydrogen stands out for reacting quickly and producing stable pressure rises. The researchers note that the technology could lead to lighter, cheaper, and highly efficient turbines, with immediate uses in electricity generation and long-term prospects in aviation.

Challenges in energy conversion

Connecting the combustion chamber to a generator and turning the intense burn into electricity required overcoming the difficulty of transferring energy stably, given the rapid and violent nature of the reactions. According to Professor Daniel Banuti, director of the Institute of Thermal Energy Technology and Safety (ITES), this was the first time a turbine of this type operated successfully and produced electricity.

With information from ScienceDaily.