Leighton Hospital

Leighton Hospital is a 700-bed general hospital in Crewe and is part of the Mid Cheshire Hospitals NHS Foundation Trust. It offers general and specialist hospital services for people across much of mid Cheshire and provides a full range of medical and surgical specialities.

Energy security for Leighton Hospital

In May 2014, the Trust was named as one of the best in the country for the third year in a row. The CHKS 40 Top Hospitals award is based on the evaluation of 22 key performance indicators and covers important areas such as safety, clinical efficiency, patient experience and quality of care.

The challenge

To meet the NHS's carbon reduction target of 26% by 2020, the Hospital were looking to reduce the overall carbon footprint and secure supplies of heat, electricity and hot water to the patient care environments at the Hospital. The Trust also wanted to make significant energy cost savings.

The solution

Veolia (Cogenco) Combined Heat and Power was first involved with Leighton Hospital in 2002 when the trust was looking to increase its CHP provision to provide electricity, heat and hot water to the hospital.

The company designed, installed and financed a 600kWe CHP and after commissioning Veolia provided operation and maintenance, remotely monitoring the unit from its Horsham office.

In 2006, following the success of the contract, Veolia was asked to operate and maintain the existing 225kWe unit on the site, which was not a Cogenco unit. The first phase of the project saw Veolia add a new control system onto the unit to link it to the Horsham helpdesk. The 225kWe unit has an absorption chiller, so that is a tri-generation installation, as it generates electricity, heating and cooling.

Veolia monitors and services this CHP under a separate agreement.
With advances in technology and engine efficiency, Veolia replaced its original unit in 2013 with a more efficient CHP system, enabling the Trust to enjoy increased energy and carbon savings under a 10 year agreement. The 571kWe CHP effectively recovers the 739kWth heat produced as a by-product of the electrical generation process. The heat is then fed back into the system to heat up water. Leighton Hospital has benefitted from Veolia's Eco2Synergy model, a CHP financing scheme which eliminates upfront capital costs. Developed for organisations such as hospitals it provides a viable and cost-effective alternative to the outright purchase of a CHP.

Both plant installations were project managed by Veolia's Engineering Team and is operated and maintained by Veolia's local mobile service teams on a 24/7 basis.

The result

The new CHP based energy system maximises energy security for the hospital, and delivers carbon savings estimated to be 857 tonnes of CO2 per year. The contract delivers the energy security needed to support patient care, reduces exposure to electricity price changes and delivers cost savings of around £165,000 per year.

We'd worked very well with Veolia (Cogenco) Combined Heat and Power in the past, they're very easy to deal with. Veolia's CHP unit does everything we wanted. Their monitoring of the energy centre works well and they're very responsive

Paul Dyche 
Head of Estates

Delivers carbon savings estimated to be 857 tonnes of CO2 per year

Delivers cost savings of around £165,000 per year

Maximises energy security and reduces exposure to electricity price changes