Power station heat recovery could meet 5 per cent of UK heating demand - report

3 June 2009 - The UK is missing out on the opportunity to recycle and reuse waste heat produced in the electricity generation process to heat our homes and business, according to a new report from the Institution of Civil Engineers (ICE).

Currently, heat production accounts for 49 per cent of all primary energy consumed in the UK, far more than in the production of electricity or that used in the transport sector, reported New Civil Engineeer.

The report, based on new research undertaken by the University of Southampton sustainability energy research group, states that the use of Combined Heat and Power (CHP) technology would allow the capture and re-use of waste heat produced in the electricity generation process, cutting energy consumption and carbon emissions.

"The truth is, that if half of the heat lost during electricity production could be captured, it would meet 25 per cent of the UK's heat demand, dramatically reducing energy consumption, cutting costs and carbon emissions," said member of ICE's energy panel Dr. Keith Tovey.

"Whilst this level of capture and re-use is not possible under the current organisation of the sector – and there are technical difficulties that need to be addressed – there are immediate opportunities for recycling and re-use, particularly at a local level that could have a marked impact.

"What we need to do is look closely at introducing district heating networks in areas surrounding viable existing power stations in the UK and ensure we assess potential heat capture possibilities for any new facilities.

"In the longer term we need to consider the potentially huge benefits that decentralised CHP could bring to the UK. With the current generation of thermal power stations coming to the end of their lifespan, there is a real opportunity to vastly improve the efficiency of our energy sector and drastically lower its carbon footprint."

The report explains that heat recovery from existing centralised power stations could meet 5 per cent of our current heating demand by 2020. This would largely be achieved through the introduction of CHP and district heating networks at specific locations, where there is a significant population within a 10km radius of a viable power station, such as those at Drax, Ferrybridge and Eggborough.

According to the report, by far the most efficient method of heat capture is decentralised CHP and district heating, of the sort used successfully in Scandinavia and other parts of Europe where smaller power stations are located close to centre of population. ICE urges investigation into how a similar approach could work in the UK.

In addition ICE would continue to encourage institution scale CHP schemes such as in hospitals and universities.

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