METHOD OF OPERATION OF THERMAL POWER PLANT Russian patent published in 2015 - IPC F01K17/02 

FIELD: power engineering.

SUBSTANCE: proposed invention relates to the field of power engineering and may be used at thermal power plants (TPP) for recycling of low-potential waste heat in condensers of steam turbines of TPPs in winter time. The method of operation of a thermal power plant, where they use a thermal engine (5) with a closed circulation circuit operating according to the organic Rankine cycle. As cooling fluid of the thermal engine (5) they use a low-boiling working fluid circulating in the closed circuit. The working fluid is expanded in an expansion turbine (6) of the thermal engine (5). Further its temperature is reduced in a heat exchanger-recuperator (10) of the thermal engine (5), condensed in a heat exchanger-condenser (8), compressed in a condensate pump (9) and heated in the heat exchanger-recuperator (10). At the same time spent steam arrives from a steam turbine (1) into a steam space of a condenser (2) of the steam turbine (1), is condensed on the surface of the condenser tubes. Condensate with the help of the condensate pump (3) of the steam turbine condenser is forwarded to the regeneration system. With the help of the thermal engine (5) they perform recycling of the low-potential waste thermal energy of steam spent in the turbine (1). The thermal engine (5) is used during condensation of steam spent in the turbine (1), besides, the low-boiling working fluid, after its heating in the heat exchanger-recuperator (10), is heated and evaporated in the condenser (2) of the steam turbine (1), using hidden heat of steam generation. This heat is removed with the help of low-boiling working fluid circulating in the closed circuit, into an expansion turbine (6) of the thermal engine (5). Condensation of the low-boiling working fluid in the heat exchanger-condenser (8) is carried out at ambient temperature from 223.15 K to 273.15 K.

EFFECT: increased efficiency factor of TPP due to complete use of low-potential waste heat for additional generation of electric energy.

3 cl, 1 dwg