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CHAPTER 3 Capstone SYSTEM DESCRIPTION Microturbine Engine (or Turbogenerator) The microturbine engine is a combustion turbine that includes a compressor, combustor, turbine, generator, and a recuperator. The rotating components are mounted on a single shaft supported by patented air bearings and spin at a maximum speed of 60,000 RPM. The permanent magnet generator is cooled by the airflow into the microturbine. The output of the generator is variable voltage, variable frequency AC. The generator is used as a motor during start-up and cooldown cycles. Fuel System The microturbine can efficiently use a wide range of approved hydrocarbon-based gaseous fuels, depending on the model. The microturbine includes an integral fuel delivery and control system. The standard system is designed for pressurized hydrocarbon-based gaseous fuels. Other models are available for low-pressure gaseous fuels, gaseous fuels with lower heat content, gaseous fuels with corrosive components, and biogas (landfill and digester gas) fuels. Contact your Capstone Authorized Service Provider for data on approved fuels and performance specifications. Power Electronics Digital power electronics control and condition the microturbine electrical output. The digital power electronics change the variable frequency AC power from the generator to DC voltage, and then to constant frequency AC voltage. During start-up, the digital power electronics operate as a variable frequency drive, and motor the generator until the microturbine has reached ignition and power is available from the microturbine. The digital power electronics again operate as a drive during cooldown to remove heat stored in the recuperator and within the microturbine engine in order to protect the system components. Electrical Output The C200 microturbine provides two electrical output connections: The main 3-phase AC power, which can provide up to 200KW An auxiliary 3-phase AC output, which can provide up to 10 kVA prior to the main power becoming available. The auxiliary power can be used for short periods of time to drive smaller three phase AC loads from the optional battery system, such as an external fuel gas booster or heat recovery system water pump. System Controls The digital system controls govern the operation of the microturbine Generator and all electronic subsystems, including the high power electronics, the fuel system and electrical output module. 410066 Rev C (June 2009) 3-2 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | CAPSTONE C200 MICROTURBINE TECHNICAL REFERENCE
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