Southampton

Pioneering scheme developed by ENGIE supplies heat, chilled water and electricity from sustainable sources to commercial and residential energy users across Southampton.

The Southampton District Energy Scheme (SDES) is operated by ENGIE, working in partnership with Southampton City Council (SCC) – under the name of Southampton Geothermal Heating Company Ltd (SGHC).

It is a pioneering project that has led the way in the delivery of sustainable heat, chilled water and power supplies in the UK. For more than 25 years, SDES has pushed the boundaries of district energy and tri-generation and continues to expand into new areas. The scheme now encompasses more than 45 energy users in the public and private sectors.

SDES is currently saving around 10,000 tonnes of CO2 emissions per annum, using heat from a large-scale combined heat and power (CHP) plant, supplemented by geothermal energy and conventional boilers. It also incorporates a district cooling system. Users include TV studios, a hospital, a university, a shopping centre, a civic centre, residential buildings and a hotel – as well as public and private-sector residential developments.

The scheme’s high level of efficiency earned it the prestigious Queen’s Award for Sustainable Development in 2001 and 2008, and a National Energy Efficiency Award in 2006. It also holds the Green Flag award.

Both CDE and SCC view the scheme as a firm foundation from which to build a sustainable future. The district energy network has also been designed to integrate additional low or zero-carbon technologies as they evolve.

Key Facts

CHP