FIELD: power industry.
SUBSTANCE: invention can be used at thermal power plants (TPP) for utilisation of excess thermal energy generated by systems of TPP during its operation. Utilisation of low-potential steam heat of heating extractions from a steam turbine, high-potential steam heat of a production extraction and low-potential heat of an oil supply system of bearings of a steam turbine is performed. All the above utilisation processes are performed by means of a thermal engine with a closed circulation circuit, which operates as per a Rankine organic cycle. A low-boiling working medium circulating in the closed circuit is compressed in a condensate pump, heated in an oil cooler of the oil supply system of bearings of the steam turbine, heated in lower and upper system water heaters of the steam turbine, evaporated and superheated in a condenser of the steam turbine with a production steam extraction, expanded in a turbine expansion engine and condensed in a heat exchanger - condenser of the thermal engine.
EFFECT: improving TPP efficiency due to additional generation of electrical power at utilisation of excess steam energy generated by TPP systems.
3 cl, 1 dwg, 1 ex
