Five parameters are controlled: steam flow rate, feedwater pressure,
and three temperatures.
Steam flow rate, which determines power level, is controlled by the
Throttle Valve attached to the driver's pedal.
Feedwater pressure is controlled by the Energy Recovery Accumulator
in the Feedpump system, discussed above.
Superheat temperature is controlled by the fuel flow.
Combustion temperature is controlled by the Burner air flow using a
butterfly valve at the Burner Blower.
Lastly, condensate subcool is controlled by the Condenser air flow
using the blinds on the Condenser, discussed above.