RWE Cogen UK
RWE Cogen is the cogeneration division of RWE Generation UK, with over twenty years’ experience. We own and operate plants throughout the UK and Ireland and offer extensive expertise in the development, construction, operation and management of a wide range of Combined Heat and Power (CHP) applications having managed nineteen CHP sites in this period from 1 to 150MW (electrical).
We continue to look for opportunities to develop mutually beneficial relationships with customers and make substantial savings to their energy costs. Through developing new CHP projects, we are also demonstrating our commitment to reaching the Government's ambition of installing 15.5GWe of good quality CHP capacity by 2020.
An important aspect of reducing energy costs is effectively managing technical and commercial risks inherent in optimising CHPs, so RWE Cogen‘s expertise can provide a valuable service to our partners.
Current operational CHP plant information
INEOS Nitriles - acquired the Seal Sands site from BASF in 2008. INEOS Nitriles is the world’s third largest chemical company and is the largest global supplier of acrylonitrile and acetoniterile. The Seal Sands plant currently produces 230,000 tonnes per annum of acrylonitrile and the acquisition of this plant supports the expertise and long-term strategy of INEOS Nitriles.
The £32 million Combined Heat and Power (CHP) plant was originally built by RWE Cogen for BASF and commenced operation in November 1997. The plant comprises a 40MW gas turbine which exhausts into a 65 tonne per hour waste heat recovery boiler before helping to supply a 40MW steam turbine.
ConocoPhillips 66 – is a Teesside refinery on the Seal Sands complex. The site is a crude oil reception, processing, storage and shipment site. It has ten crude oil storage tanks of 750,000 barrel capacity and is still a major linchpin in the global oil market. In 2005 in partnership with RWE Cogen the existing on-site combined cycle gas turbine (CCGT) power station was modified to give Combined Heat and Power (CHP) plant functionality as well as retaining CCGT capability.
The £30 million plant was built by RWE Cogen, who also own and operate the plant. It comprises of a 40MW GE Frame 6 gas turbine, which exhausts into a 60 tonne unfired waste heat recovery boiler, combined with an 18MW steam turbine to produce electricity and steam for the oil terminal or standalone CCGT.
Whitegate Oil Refinery – is located near Cork in the Republic of Ireland and was bought by Irving Oil in 2016 from Phillips 66. It consists of a 6MW Siemens SGT200 gas turbine providing steam to the refinery via a fired waste heat recovery boiler under a long term Energy Supply Contract (ESC).
About CHP and how it works
Combined Heat and Power (CHP) is the simultaneous generation of heat and electrical energy from a single source. The technology utilises the waste heat from electricity generation to provide useful heat for process or space heating. CHP can therefore deliver savings in fuel consumption, fuel costs and carbon emissions, in addition to avoiding transmission losses otherwise incurred by importing electricity.
An engine, typically a gas turbine, is connected to an electrical generator to produce electricity. The exhaust then heats water in a waste heat recovery boiler to produce steam, some of which goes direct to the customer. The rest is sent through the steam turbine to produce more electricity, which can either be used on site or exported. The remaining steam or hot water is used for process or space heating.
Benefits of CHP
- Overall efficiencies of more than 80%
- Radical reduction in carbon emissions
- Cost savings of between 15% and 40%
- Increased independence and security of on-site generation
- Proven and reliable technology
- Low cost technology in comparison to other low carbon options
- Flexibility of fuel type
- Flexible and responsive heat supplies