METHOD OF UTILISATION OF LOW-GRADE HEAT OF OIL SUPPLY SYSTEM OF STEAM TURBINE BEARINGS OF HEAT POWER PLANT Russian patent published in 2015 - IPC F01K17/02 F01K13/02 F01K25/10 

FIELD: power industry.

SUBSTANCE: invention relates to power engineering and can be used in heat power plants (HPP) for utilisation of low-grade heat of oil supply system of steam turbine bearings for additional electric power generation. The spent steam is supplied from the steam turbine into the steam space of the condenser where steam is condensed on the surface of condenser tubes. Condensate by means of the condensate pump of the steam turbine condenser is pumped to the regeneration system. In the steam turbine the oil supply system with oil cooler for steam turbine bearings is used and utilisation of low-grade heat of oil supply system of steam turbine bearings by means of the heat engine with the closed circulation circuit, operating according to organic Rankine cycle, is performed, in the named heat engine the cooling liquid is the low-boiling working body circulating in the closed circuit. The low-boiling working body is compressed in the condensate pump of the heat engine, evaporated and overheated in the oil cooler, expanded in the turbine expander of the heat engine and condensed in the heat exchanger condenser of the heat engine. In special cases of the invention implementation the heat exchanger condenser of the heat engine is an air cooling condenser or a water cooling condenser, or an air and water cooling condenser. The low-boiling working body is the liquefied carbon dioxide CO₂.

EFFECT: increase of efficiency of heat power plant due to utilisation of low-grade heat of oil supply system of steam turbine bearings for additional electric power generation.

3 cl, 1 ex, 1 dwg