Types of CHP
Biomass CHP systems are much less carbon intensive than gas or coal-powered plant, as they use a lower-carbon, more sustainable fuel source.
There are several hundred biomass-fuelled CHP plants in operation on the continent – the
majority using solid biomass. Sizes vary, but most installations have a rated boiler output of more than 5MWth, with only a few generating at below 50kWe. These systems tend to use a mature combustion technology such as a steam turbine but systems using the Organic Rankine Cycle (ORC) are increasingly common.
There are three main medium-scale Biomass CHP options offered by our sister company Wood Energy Ltd – each depending on the applications and individual site requirements.
There are variants on the options listed below, and these can be incorporated once specific and detailed information has been determined.
● Steam boiler with screw expander up to 500kWe
● Hot air boiler with ORC (Organic Rankine Cycle) up to 250kWe
● Thermal oil boiler with ORC up to 1MWe
● Steam boiler with steam turbine up to 1MWe
Screw expanders have an approximate efficiency of c.6% and c.18% for
applications incorporating ORC.