An Analysis of Various Options of Using Biomass in Supercritical Coal Fired Power Plants

The paper deals with a conception of replacing high-pressure regeneration in a supercritical coal fired power plant by a water boiler combusting biomass. The technology classified as belonging to the group of methods simultaneously co-firing biomass and coal is an alternative of the actually applied direct methods. Five variants of the configuration of replacing three regenerating exchangers have been analyzed. The reference system was a supercritical coal fired power plant. The fundamental indices have been determined which may be used to assess the newly created system, viz. cycle efficiency and electrical efficiency. Moreover, the share of electrical energy generated by the application of biomass in the entire amount of energy produced in the power plant has been analyzed. The values of the share of all the considered variants are being compared with a 7.5 percentage resulting from those presented in the instruction 2001/77 /WE.