Bucuresti Vest CHPP – extension with modern cogeneration units
Short description:
This Feasibility study was performed by ISPE for "ELECTROCENTRALE" Bucharest Romania in order to evaluate the possibility to install a new co-generation unit, based on gas turbine, in Bucuresti Vest CHPP. The aim of the study was the performance of a new cogeneration unit able to provide heat under different ambient conditions and at the same time to supply power to the National Power System. The conceptual design for the new unit was developed having in view efficient fuel utilization, low installation costs in combination with high quality and reliability equipment. All utilities: demineralized water, fuel (diesel oil, natural gas), air process, cooling water, softened water, drinking and fire fighting water, will be ensured from the existing auxiliary systems of Bucuresti Vest CHPP.
The new cogeneration unit consists of:
one gas turbine generator set consisting of a combustion gas turbine and an air-cooled turbo generator coupled directly to the gas turbine.
The gas turbine, heavy duty type, will be provided with dual burners for Diesel Oil and Natural Gas and NOx control and reduction system with water injection:
- one heat recovery steam generator (HRSG) in single pressure design with supplementary gas firing. One tube bundle heat exchanger is installed at the cold end of the HRSG for district heating network water.
- one counter pressure steam turbine unit with radial exhaust design in a heat exchanger cooled with water from the district heating network water and direct connection to the turbo generator.
- feed water system with demi water tank and deaerator, boiler feed water pumps.
- district heating system with piping, heat exchanger, recirculation pump station.
- distributed control system(DCS)
- HV electrical equipment up to the transformer bushings.
- two generator step-up transformer up to 110 kV.
- balance of plant mechanical and electrical equipment including auxiliary cooling water system, closed cooling water system, crane, natural gas supply system, diesel oil supply system, fire fighting system, compressed air system, etc.
- civil works.
Services offered:
- Pre-Feasibility study
- Feasibility study
- Permit construction (PAC)
- Designing of structure, architecture, indoor installations, general lay-out, networks in the precinct, connection to existing units
- Adapting VaTech designs to the Romanian legislation
Estimated technical performances:
- Gas Turbine Performances
- Power Output = 124 MW
- Heat rate = 10,656 Kj/KWh
- Net Electrical Efficiency = 33.8 %
HRSG Performance:
Steam at Superheater Outlet
- flow = 270 t/h
- pressure = 67 - 105 bar
- temperature = 510 - 515 0 C
Steam Turbine Performance:
Power Output = 60 MW
Steam at Turbine Inlet
- pressure = 67-105 bar
- temperature = 510- 515 0 C
- steam extraction 5-6 bar
- counter pressure 1.1 - 0.5 bar
Cogeneration Unit Performances:
- Gross Electrical Output = 192.4 MW
- Gross Heat rate = 8,380 Kj/KWh
- Gross Heat amount to District Heating System = 170 Gcal/h
- Net Efficiency = 87.1 %
Results/Impact/ Efficiency:
- updated net income (VNA): 8687 mil. Euro
- estimated execution period: 24 months and 3 months for operating tests
- investment recovery period: 8 years
- investment rate of return (RIR): 15%.
Country and location:
Bucuresti Vest CHPP is located in the Western part of Bucharest, Romania.
Client:
ELECTROCENTRALE Bucharest, Romania.
Start/Comissioning date:
- Start date of the Feasibility study: November 2003.
- Construction permit: September 2004.
- Civil, architecture, indoor installations, general lay-out: March 2005 - June 2006.
- Commissioning: November 2006.
Associated companies:
Convex, Graz / Austria and ISPE / Romania: consulting and engineering
GE / USA, Alstom / France, Skoda / Czech Republic: main suppliers
Kalenici / Turkey: civil works company
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