Case Studies
CHP at Western General Hospital
The Western General Hospital is a large acute hospital situated in north west Edinburgh. Scottish & Southern Energy (SSE) operates the energy centre including steam boilers, emergency generator, etc. on behalf of the Hospital Trust. SSE also supplies the hospital with electricity from the grid.
As part of the long term contract and to give increased energy efficiency SSE installed a 1 MWe CHP scheme in the boilerhouse. Cadogans was appointed by SSE to design and manage the whole scheme. The project capital value was approximately £600k.
The plant comprises a 1 MWe gas engine, 800 kg/hr steam boiler, engine cooling heat recovery and ancillary equipment.
The engine generates power at 415V and this is then stepped up to 11kV in a transformer before connection to the hospital’s main HV switchroom. The plant operates in parallel with the grid at all times.
Five separate contracts were let covering main plant items, builderswork, high voltage electrical connection, mechanical and electrical enabling works and building management system connection. Cadogans was responsible for specifying the works for all contracts and co-ordinating the on-site activities of all parties.
The project also required close co-operation with the Trust regarding connection to the hospital electrical and steam systems.
The project was completed on time and within budget and has operated with a high degree of reliability since commissioning.
