Edina CHP saves over £1million in energy costs for Royal Liverpool University Hospital
Edina Group supplies, installs and maintains two high efficiency natural gas engines to reduce the energy costs by £1million, reduces carbon emissions by 87,000 tonnes per annum and provides security of power supply for this critical region wide hospital.
The Royal Liverpool University Hospital is the largest hospital in Merseyside and Cheshire. Based close to the city centre, the hospital provides emergency, general and specialist treatment to patients from across the North West, North Wales and the Isle of Man.
The hospital currently has around 40 wards, more than 710 beds and incorporates the main Emergency Department for the city of Liverpool, the largest of its kind in the country treating major, complex trauma as well as minor injuries.
As a leading University Hospital, placements are available for student doctors, nurses, dentists and allied health professionals from both the University of Liverpool and Liverpool John Moore’s University.
The energy centre that provides the hospital with its total power, heating and cooling requirements is operated by Dalkia Utility Services, who awarded Edina Group, the contract to supply and install 2 x MWM TCG 2032 V12 combined heat and power (CHP) units as a means to reduce the energy and carbon emissions whilst maintaining a high level of availability for this critical site.
Each unit is rated at 2.65MWe, one of the largest installations of its type in the country at the time.
The CHP systems provide power, LTHW (Low Temperature Hot Water), HTHW (High Temperature Hot Water) and steam to the Hospital. Throughout its installation, the system has performed to a consistently high standard achieving an average availability of 95% over this period.
The system has clocked up over 170,000 operating hours and both units have undertaken several major overhauls whilst still maintaining their excellent availability, far exceeding the industry standard of a plant of this age.
On-going innovative upgrades have been incorporated to improve performance, one of these being a modification to the exhaust heat system which recovers an additional 300kWt.
The installation received a “highly commended” award at the 2012 Association of Decentralised Energy (ADE) (formerly known as the Combined Heat and Power Association) Awards ceremony as it was one of the first of its type at this size using reciprocating gas engine technology in lieu of the conventional gas turbine approach (the industry standard at the time of installation).
The electrical efficiency of the MWM engine averages in excess of 40%, which is much greater than an equivalent sized gas turbine or other reciprocating engine of this age.
This installation demonstrates the effective use of reciprocating gas engine technology when supported by a fully inclusive maintenance contract. The most recent major overhaul took place in 2011 and the engine is still operating within the requirements of CHPQA (Combined Heating and Power Quality Assurance)
In March 2010, the British Government gave the go ahead for a £451 million redevelopment of the hospital, which will make the hospital one of the most advanced in the North West of England.
“This project has not only significantly reduced the Trusts’ energy bill across both Hospital sites, but also enabled us to substantially improve the reliability and resilience of our electrical supplies,” commented AJ Wilkes, Executive Director of Finance Royal Liverpool and Broadgreen University Hospitals NHS Trust.