How it Works

Cool Energy’s novel low-temperature ThermoHeart™ Stirling Engines were designed for heat-to-electricity applications.  We tap into a liquid or gas heat stream and convert it into mechanical energy to produce electricity.  The ThermoHeart™ Engine differs from other Stirling engines because it can operate at lower  input heat temperatures(150°C to 400°C). These engines are a new approach to the well-known Stirling cycle, employing a breakthrough engine configuration, low-cost materials, non-combustion, self-lubricating components, a nitrogen working gas, and very long service intervals.  A Stirling cycle engine is a heat engine that operates by expansion and compression of air or other gas (called the working fluid), a temperature differential yields a net conversion of heat energy to mechanical work. The resulting mechanical work drives a generator built inside the ThermoHeart engine that creates electrical power (currently 3kW and 25kW output models).