Marek Kras

A combined cycle gas turbine power plant, frequently identified by CCGT shortcut, is essentially an electrical power plant in which a gas turbine and a steam turbine are used in combination to achieve greater efficiency than would be possible independently. The gas turbine drives an electrical generator. The gas turbine exhaust is then used to produce steam in a heat exchanger (steam generator) to supply a steam turbine whose output provides the means to generate more electricity. However the Steam Turbine is not necessarily, in that case the plant produce electricity and industrial steam which can be used for heating or industrial purpose.

Main Gas Turbine Manufactures: General Electrics, Simens Westinghouse & Alstom Approximately Cost per MW – 0.7mln E Efficiency approx 40% for gas turbine however in the CCGT plant the efficiency is 50-60% (even higher for cogenerated plant) Low Green Gas Emission C02, NOx & SOx Chepear comparing to other technology e.g. CCS Lifetime years

220kV Tabert Substation 110kV Clahane Substation

Natural Gas. Resources not available in Ireland Synthetic Gas from coal. Resources not available in Ireland Fuel Oil. Resources not available in Ireland Biogas from forestry, domestic and agricultural waste. Resources available in Ireland

VariableCCGTHigh Efficiency Cogeneration Transmission NetworkLower ImpactHigher Impact Power LossesLess power lossesHigher Power Losses Heat MarketRequiredNot Required Fuel consumption-33%+33% CO2 Emission-67%+67% Water Consumption-30%+30% Capital Cost per kW delivered

Grid Code contains general conditions and rules for general application. The specification and conditions for each application are adjust individually. Those information are included in Grid Connection Offer & Agreement between developer and Transmission Operator TSO. Client (Requires connection) and TSO must implement Grid Code specification during each stages of the project, for project above 10MW TSO may disconnected or terminated the Grid Connection Agreement if the Grid Code is not implemented by client. The Implementation of the Grid Code may have significant impact on the cost of the Grid Connection ESB Networks Electrical Safety Rules must be implemented

Capacity of the transmission lines Small Infrastructures of the High Voltage Lines Distance from Energy Load Centres (West Coast) High Cost of Design and planning permission for Shallow Connection, significantly for OHL 220kV Planning Restrictions regarding OHL Construction

VariableCost Gas & Steam Turbine Generator 210’000’000 2 bay 110kV/220kV Substation 4’420’ kV OHL710’000/km (12km) 110kV OHL320’000/km (15km) Buried Cable 500MVA (optional) 2’150’000/km Total Cost227’740’000