About RP Energy

Redondo Peninsula Energy, Incorporated (RP Energy) was founded in 2007 and is based within the Subic Bay Freeport Zone. It is a joint-venture company formed by Meralco PowerGen Corporation, Therma Power, Incorporated and Taiwan Cogeneration International Corporation.

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RP Energy
Redondo Peninsula Energy Incorporated

The Power Plant

RP Energy’s power plant will use the most advanced environment-friendly technology in the use of coal for power - the Circulating-Fluidized-Bed (CFB) technology.

Main Plant Equipment

Boiler

The boiler serves as the coal combustion chamber from where heat is generated to convert water into steam, which in turn drives the turbines. For the proposed plant, the boiler operation is based on the CFB technology. The boilers are of sub-critical pressure design; drum type, balanced draft, indoor, and circulating fluidised bed combustion boilers.

To meet environmental regulation requirements by the DENR, the project will make use of CFB boilers with low temperature combustion limiting NOX formation; limestone injection into the furnaces for desulphurization; electrostatic precipitators for dust collection; stack of appropriately designed height; and waste water treatment facility.

Turbines

The function of the turbines is to transform the thermal energy of the steam generated from the boilers into kinetic energy, which in turn is transformed to electric energy by the generators. Some of the thermal energy generated during the turbine cycle is used to heat feed water for steam generation, while any residual heat is dissipated in the condensers to the circulating water system.

Generators

The hydrogen-cooled synchronous generators selected are rated at 16.5-kV to 21-kV, 60 Hz, and 0.85 power factor. One unit will be installed for Phase 1 and a second for Phase 2.

Control Systems

The 230-kV equipment will be controlled with computerized control system. The network control system (NCS) will include the man-machine-interface (MMI), control panels, consoles and engineering station, etc. The NCS and Distributed Control System (DCS) will be connected through communication cables and through hardwires for the critical signals. The DCS will provide modulating control, digital control, monitoring, alarming, logging, data archiving, and indicating functions for the Plant systems.

An auxiliary table mounted operator interface panel installed on the operator console will be provided in the central control room to house hardwired emergency trip buttons that are independent to the DCS to allow manual tripping of the boiler and turbine in the event the DCS has failed.

The DCS control system will include redundancy features to mitigate the occurrence of a single failure that could cause complete failure of the system. Generally, as part of the design practice, redundancy will be applied on a case by case basis. Redundancy will be applied especially for: DCS power supplies, DCS main data highway system, DCS controllers, and critical measurements such as drum levels. For example, redundant sensors will be distributed in different cards to mitigate the occurrence of a common mode failure.

Major equipment suppliers will incorporate redundancy for their protection systems as a part of their standard design. DCS will be fed from two power circuits. Primary power is from the uninterruptable power supply (UPS); secondary power is from the emergency auxiliary power system. In the event the UPS is in trouble or undergoing maintenance, the emergency power can be used. All devices inside DCS such as cabinets, man-machine interfaces and printers will be powered in this way.

The package control systems for mechanical equipment generally use PLCs for the control and monitoring of the equipment packages.

Electrostatic Precipitators

The function of the electrostatic precipitator is to remove suspended particulate matter from the flue gas of the coal-firing boiler using electrical forces. The electrostatic precipitators collect fly ash so that the particulate emission loading will not exceed DENR limits.

Electrostatic precipitators are cold-and-dry types with about four or five fields in one chamber (one casing per unit) suitable for 100 percent duty gas flow at boiler maximum continuous rate (MCR). The electrostatic precipitator of each boiler will have a hopper for collection of ash and other steel structures, such as stairways and platforms.

The electrostatic precipitator will be located between the air pre-heater outlet and the induced draft fan inlet, with operating temperature of 120 to 155ºC and maximum flue gas velocity of 1.37 m/s. The electrostatic precipitators will be designed so that the collected dust and ash cannot escape again due to gas flow fluctuation. Particulate concentration at the outlet will be 50 mg/Nm3 or less.

Dust particles that accumulate on the collecting electrodes fall into the hopper as they release their charge. Residual particles will be periodically removed through rapping (or hammering).

Coal and Limestone Storage Dome

Environment-friendly storage and containment of coal stockpile. Prevent the exposure of coal and its fugitive dust onto the surrounding environment, minimizes contact with rainwater and daily moisture, and reduces the possibility of inherent spontaneous combustion.

Capacity: 110,000 MT