Abstract:
A system and method for generating electric power using a generator coupled to a turboexpander is disclosed. The system includes one or more thermal pumps configured for heating a fluid to generate a pressurized gas. A portion of the pressurized gas is discharged to a buffer chamber for further utilization in a Rankine system. A further portion of the pressurized gas is expanded in a turboexpander for driving a generator for generating electric power. Optionally, the system includes a pump to pressurize a portion of the fluid depending on the systems operating condition. The system further includes one or more sensors for sensing temperature and pressure and outputs one or more signals representative of the sensed state. The system includes a control unit for receiving the signals and outputs one or more control signals for controlling the flow of gases and liquid in the valves and the check valve.
Abstract:
A method for adjusting startup floor pressure levels of HRSG steam circuits is implemented by a pressure controlling computing device including a processor and a memory. The method includes receiving a plurality of measured plant operating values associated with a HRSG steam circuit, identifying a plurality of candidate pressure levels for use in pressurizing the HRSG steam circuit, determining a calculated steam velocity level for each of the plurality of candidate pressure levels, identifying a steam velocity limit for a steam piping section of the HRSG steam circuit, selecting a lowest pressure level of the plurality of candidate pressure levels, wherein the lowest pressure level is associated with a determined calculated steam velocity level that does not exceed the identified velocity limit, and pressurizing the HRSG steam circuit to the selected lowest pressure level.
Abstract:
A method for adjusting startup floor pressure levels of HRSG steam circuits is implemented by a pressure controlling computing device including a processor and a memory. The method includes receiving a plurality of measured plant operating values associated with a HRSG steam circuit, identifying a plurality of candidate pressure levels for use in pressurizing the HRSG steam circuit, determining a calculated steam velocity level for each of the plurality of candidate pressure levels, identifying a steam velocity limit for a steam piping section of the HRSG steam circuit, selecting a lowest pressure level of the plurality of candidate pressure levels, wherein the lowest pressure level is associated with a determined calculated steam velocity level that does not exceed the identified velocity limit, and pressurizing the HRSG steam circuit to the selected lowest pressure level.
Abstract:
The present application provides an energy control computing device for adjusting one or more steam flow parameters delivered to a steam turbine from a heat recovery steam generator via a number of control devices. The energy control computing device includes a processor in communication with a memory. The processor is programmed to receive a number of measured operating values, identify steam turbine operating limits, identify a number of candidate operating modes meeting steam turbine operating limits, selecting the candidate operating mode maximizing the steam flow parameters while not exceeding the steam turbine operating limits, and directing the control devices to meet the selected candidate operating mode.
Abstract:
A system and method for generating electric power using a generator coupled to a turboexpander is disclosed. The system includes one or more thermal pumps configured for heating a fluid to generate a pressurized gas. A portion of the pressurized gas is discharged to a buffer chamber for further utilization in a Rankine system. A further portion of the pressurized gas is expanded in a turboexpander for driving a generator for generating electric power. Optionally, the system includes a pump to pressurize a portion of the fluid depending on the systems operating condition. The system further includes one or more sensors for sensing temperature and pressure and outputs one or more signals representative of the sensed state. The system includes a control unit for receiving the signals and outputs one or more control signals for controlling the flow of gases and liquid in the valves and the check valve.