Brayton cycle

About

The Brayton cycle is a thermodynamic power conversion cycle in which a working fluid (typically a gas) is compressed, heated by an external energy source, expanded through a turbine to generate mechanical work, and then cooled before repeating the process. In robotics and space AI applications, closed Brayton cycle (CBC) systems are primarily used to convert heat from nuclear reactors into electrical power for spacecraft, surface bases, and planetary rovers — environments where solar power is impractical or insufficient. The turbine drives a generator, producing the electricity needed to run propulsion systems, scientific instruments, and onboard computing. Brayton cycle systems are attractive for space applications because they offer scalable power output across a wide range from kilowatts to megawatts, relatively high efficiency, and the potential for long operational lifetimes with few moving parts. Compared to alternatives like Stirling converters, Brayton systems tend to excel at higher power levels, making them a leading candidate for enabling ambitious robotic and crewed deep-space exploration missions that demand substantial, sustained electrical power far from the Sun.