HC Deb 15 June 2004 vol 422 cc814-5W
Mr. Tynan

To ask the Secretary of State for Trade and Industry what estimate she has made of changes in carbon emissions which would result if all gas fired power stations which have been approved, but are yet to enter service, replaced existing carbon emitting generators. [178323]

Mr. Timms

The answer depends on the assumptions made about the type of existing carbon emitting generation which the new gas-fired capacity would replace and the load factor for the new gas-fired plant. There is currently around 4,800MW of gas-fired capacity, comprising six large stations, approved but yet to enter service.

If coal-fired plants are replaced then the carbon saving would amount to around 4 million tonnes per annum as coal emits more than twice the amount of carbon as gas per TWh of generation. If older gas-fired generation plants were replaced then the change in emissions would be around 0.3 million tonnes per annum, the change reflecting only the higher efficiency of new gas-fired generation compared with older gas generation technologies. A load factor of 70 per cent. is assumed for gas-fired generation.

Mr. Tynan

To ask the Secretary of State for Trade and Industry what estimate she has made of how much carbon would be emitted if all gas fired power stations which have been approved, but are yet to enter service, entered service. [178324]

Mr. Timms

There is currently around 4,800MW of gas-fired capacity comprising six large stations, approved but yet to enter service. The level of associated carbon emissions will depend on the operational load factor associated with this capacity. On the assumption of a 70 per cent. load factor, emissions from these stations would amount to around 3 million tonnes of carbon per annum. The net impact on UK emissions will depend on what type of capacity (conventional fossil fuel or nuclear generation) this new capacity is replacing.

Mr. Tynan

To ask the Secretary of State for Trade and Industry what estimate she has made of the likely changes in carbon emissions if all renewable electricity generators which have been approved, but are yet to enter service, replaced carbon emitting generators. [R] [178325]

Mr. Timms

There is currently around 1700MW of renewable capacity approved but yet to enter service. This comprises 500MW of onshore wind and 1200MW of offshore wind as well as 20MW of hydro power. The change in carbon emissions associated with this level of new renewables capacity will depend on the assumption made about the type of carbon emitting generation which it replaces and the operational load factors associated with the renewables capacity.

If new renewables capacity replaces gas-fired generation, which would otherwise have been built, then the reduction in emissions would amount to around 0.5 million tonnes of carbon per annum. If the new capacity is assumed to have replaced coal-fired generation then the change in emissions would amount to around 1.2 million tonnes of carbon per annum. These figures are based on the assumptions of a 30 per cent. load factor for onshore wind and 35 per cent. for offshore wind and hydro.