FAQs

In this section we aim to answer your Frequently Asked Questions (FAQs) on our proposals. As the project progresses we will upload topic specific FAQs where particular topics are raised locally as being of significant importance.

What is a CCGT?
Combined Cycle Gas Turbine (CCGT) power generation is the cleanest and most  efficient  method of fossil fuel power generation.  A CCGT power station combines the technologies of gas turbines and steam turbines to produce electricity more efficiently than can be done using either of these technologies separately.

The diagram above shows a typical combined cycle process. Click on the diagram to expand.

In the gas turbine atmospheric air is compressed and passed into a combustion chamber where it is burnt with natural gas.  The resulting hot combustion gases expand through the gas turbine, which drives an alternator / generator to produce electricity.  The hot exhaust gases from the gas turbine contain recoverable energy and are, therefore, used in heat recovery boilers to generate steam.  This steam is used to drive a steam turbine to generate additional electricity thereby maximising the overall efficiency of the power station.

In the case of the CCGT power station proposed for Knottingley it is intended that there will be three gas turbines, each connected to their own dedicated heat recovery boiler, steam turbine and electricity generator.  Each CCGT will generate approximately 500MW of electrical power resulting in an overall power generation capacity of 1500MW, enough to power around two million homes.

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Why are you building a new power station?
We all use electricity every day; from boiling the kettle, turning on your computer or watching the television. The amount of electricity we use will steadily increase in coming years as we electrify our transport and heating systems and we move to a low carbon economy.

Whilst our demand for electricity increases, a significant amount of older generating capacity will need to be replaced. This is because many of the UK’s existing nuclear, coal and oil fired power stations are either nearing the end of their lives, or are being forced to close due to environmental legislation.

As well as replacing closing power stations, a new CCGT at Knottingley will also support the UK’s transition to a low carbon economy. CCGTs do this by replacing more carbon intensive fossil fuel fired power stations and by providing back up for intermittent renewable sources of electricity.

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Why build a new power station in Knottingley?
The site has:

  • Good access to infrastructure
  • Access to suitable gas network
  • Access to high voltage connection to National Grid electricity network
  • Proximity to transport and communications
  • Suitable planning allocation
  • Sufficient space
  • Local industrial base to provide service activity

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Who is the project developer?
The project is being developed by Knottingley Power Ltd, a company that has been created for the purpose of constructing and operating a new CCGT power station at the site of the former Oxiris Chemical site, East Knottingley.  Knottingley Power Ltd is a wholly owned subsidiary of Electricity Supply Board (ESB).

ESB has a portfolio of investment projects internationally and currently has operations and project in over 35 countries, including the UK, continental Europe, the Middle East and Africa

ESB has had a presence in the British energy market since the early 1990s as the developer and owner of Corby Power Limited, one of the first independent power projects in the UK.  ESB also successfully developed the new 842MW CCGT plant at Marchwood, near Southampton, which entered commercial operation in 2009. Additionally, construction of a new 880MW CCGT plant at Carrington near Manchester commenced in 2012 and is expected to enter commercial operation in 2015.  These projects have the capacity to generate enough electricity to supply approximately 2 million homes.

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What benefits to the local and wider community will it bring?
A new CCGT plant at Knottingley will create a range of benefits to the local community. These will include:

  • Around 1,100 jobs during the peak construction phase on site