PLANT AND METHOD FOR INCREASING THE EFFICIENCY OF ELECTRIC ENERGY PRODUCTION

摘要

A plant (10, 110) for the production of electric energy comprises a fuel boiler (11) in which a fluid is heated in order to produce steam, a turbine (15) which is connected to an electric generator (16) and to which said steam is conveyed, and a condenser unit (19) which re-condenses the fluid output from the turbine so that it may be conveyed back to the steam generator. The return fluid along the path from the condenser unit (19) to the boiler passes through a preheating unit (22) which receives heat from the turbine steam bleed-offs (23) and from a thermodynamic solar field (25). By making suitable use of the heat produced by the solar field (25) and contained in the heat-carrier fluid which passes through it, it is possible to increase the overall efficiency of the plant (10, 110). Furthermore, advantageously, the heat-carrier fluid which passes through the thermodynamic solar field receives heat from the fuel boiler via a suitable exchanger (32) which allows an increase in the productivity of the solar field itself and, moreover, uses the residual heat of the main plant which otherwise would be lost.

主权项

1. Plant for the production of electric energy comprising a fuel boiler in which a fluid is heated in order to produce steam, a turbine which is connected to an electric generator and to which said steam is conveyed, a condenser unit which re-condenses the fluid output from the turbine so that it may be conveyed back to the boiler, thus forming a closed-circuit, the return fluid along the path from the condenser unit to the boiler receiving heat from a preheating unit designed to receive heat both from turbine steam bleed-offs and from a heat-carrier fluid of a thermodynamic solar field, characterized in that it comprises a circuit in which the heat-carrier fluid of the solar field may receive residual heat from the fumes emitted by the boiler.