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 gasturbine 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 30-40 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

Variable CCGT High Efficiency Cogeneration

Transmission Network Lower Impact Higher Impact

Power Losses Less power losses Higher Power Losses

Heat Market Required Not Required

Fuel consumption -33% +33%

CO2 Emission -67% +67%

Water Consumption -30% +30%

Capital Cost per kW delivered 630 1200

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

Variable Cost

Gas & Steam Turbine Generator

210’000’000

2 bay 110kV/220kV Substation

4’420’000

220kV OHL 710’000/km (12km)

110kV OHL 320’000/km (15km)

Buried Cable 500MVA (optional)

2’150’000/km

Total Cost 227’740’000