Description of the biomass CHP technology based on a steam turbine process: The CHP technology based on a steam turbine process represents a field-tested large-scale application (>2 MWel) in the field of electricity production from solid biomass. The process of generating electricity from steam comprises following parts: a firing subsystem (biomass combustion), a steam subsystem (boiler and steam delivery system), a steam turbine with electric generator, as well as a feed water and condensate system. In terms of combustion technologies grate firing systems or over a firing thermal capacity of 20-30 MW fluidised bed combustion units are commonly implemented. In the lower power range of steam turbine technologies either still fire tube boilers or already water tube boilers are applied as steam generators. Above a power range of 5 MWel, due to the higher attainable live steam parameters, steam is produced in water tube boilers.