The Capstone MicroTurbine System includes a compressor, recuperator, combustor, turbine and permanent magnet generator (Figure 1). The rotating components are mounted on a single shaft supported by air bearings. The generator is cooled by the air flow into the gas turbine. The air is compressed and injected into the recuperator where its temperature is elevated by the exhaust gases expelled from the turbine. This process doubles the system efficiency. The heated compressed air is mixed with fuel and combusted in the combustion chamber. The combusted hot gases expand through the turbine, providing the rotational power. Patented techniques in the combustion process result in an extremely low emission exhaust stream. The shaft rotates at up to 96,000rpm. The output of the generator is variable voltage, variable frequency AC power. Power electronics convert the variable voltage, variable frequency AC power to programmable DC power for HEV applications.
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