London’s King’s College Hospital NHS Foundation Trust has installed three new highly efficient Byworth Boilers steam boilers.
In developing its new combined heat and power (CHP) installation, the hospital has replaced five 40-year-old boilers with three “Yorkshireman” packaged steam, three-pass boilers. Two, specifically designed by Byworth chief design engineer John Fox, combine a fired boiler with a waste heat recovery boiler, with heat from the CHP engine exhaust gases topping up the 10,000 kg/ hour of steam produced by the fired side. The third, slightly larger, 11,250 kg /hour unit is a standard-fired Yorkshireman boiler with dual fuel burner. For maximum energy efficiency, all three boilers incorporate flue gas economisers which extract heat from the flue gases to pre-heat the feed water. The combination boilers have two integral economisers, one configured for the waste heat section and one for the fired section. The boilers had to be positioned at first floor level in a very tight space, meaning lowering each by crane onto a specially made steel frame.
