Startup and control methods for an ORC bottoming plant

Details Startup and control methods for an ORC bottoming plant Startup and control methods for an ORC bottoming plant

2007-04-10

2007-04-10

Nguyen, Hoang (Department: 3748)

Power plants

Motive fluid energized by externally applied heat

Process of power production or system operation

C060S660000, C060S039440, C060S667000, C060S671000

Reexamination Certificate

active

10840775

ABSTRACT:
The invention is a system and method for smoothly starting and controlling an ORC power plant. The system comprises a cascaded closed loop control that accounts for the lack of relationship between pump speed and pressure at startup so as to control pump speed and pressure, and that smoothly transitions into a steady state regime as a stable operating condition of the system is attained. The cascaded loop receives signals corresponding to a superheat setpoint, a pressure at an evaporator exit, and a temperature at an evaporator exit, and controls the pump speed and pressure upon startup to provide smooth operation. The system and method can further comprise a feed-forward control loop to deal with conditions at start-up and when external disturbances are applied to the ORC power plant.

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