Combined Heat & Power, District Heating & Cooling, Demand Side Services, Energy Efficiency

University Hospital Southampton

As part of the UK’s largest Teaching Trust the 1011-bed Southampton General Hospital and 257 Princess Anne Hospital provide a number of specialist services including neurosciences, oncology, pathology and cardiology. Emergency and critical care is provided in the hospital’s special intensive care units, operating theatres, acute medicine unit and emergency department (A&E), as well as the dedicated eye casualty. Southampton General also hosts outpatient clinics, diagnostic and treatment work, surgery, research, education and training, as well as providing day beds and longer stay wards for patients in the area. Princess Anne Hospital is situated adjacent to the Southampton General Hospital and provides comprehensive maternity care for 6000 women each year.

University Hospital Southampton | Commercial CHP

In 2000 with their heating boilers at the end of their operational life and not able to meet the future energy demands of the hospital, the Trust looked for ways of replacing them and delivering stable utility supplies for the site. To meet both hospitals needs for heating, electricity and standby generation Dalkia designed a CHP based energy solution capable of delivering the stable supplies and installing the new plant without interrupting the work of the hospital. 

Included in this first phase was a 2 MWe base load generation capacity from a combined heat and power plant with an additional 4MWe of standby capacity. Under the scheme, steam is generated by a waste heat boiler, two 11,400kg per hour boilers, and three existing boilers.

In 2011 the expansion of the site created a demand for more energy and a new 15 year contract provided a further £2.5million upgrade which included a 2MWE CHP from Dalkia’s specialist CHP division Cogenco, and a combination waste heat/fired boiler to deliver heating, hot water and electricity.


  • Cost savings of £500,000 per year
  • CO2 savings of 6,500 tonnes per year.
  • Helps meet the NHS carbon reduction targets 
  • Better availability and control of utilities for the patient care environment

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