Heat recovery boilers

There are many processes which result in heat as a waste product, such as refrigeration, CHP, anaerobic digestion etc, and this heat can often be utilised elsewhere in the organisation for either steam or hot water production. In order to harness the waste heat a boiler must be designed specifically for the application as no two sites are alike. It doesn't matter if the amount of waste heat fluctuates or is not sufficient to produce the output of steam or hot water required. Two boilers could be employed, one for the waste heat and a second traditionally fired boiler to make up the shortfall. However this is not necessary as Byworth can design and build a combination boiler where steam or hot water is produced from a combination of waste heat and a traditional burner all in the same boiler shell. This obviously saves footprint, but more crucially, capital outlay. As fuel prices are set to rise yet again this winter, payback periods for heat recovery systems are reducing dramatically, and are usually measured in months rather than years.

The photograph shows one of the two 10,000 kg/hr combination boilers installed at Kings' College Hospital Energy Centre, London.