| 摘要 |
FIELD: power industry.SUBSTANCE: invention can be used in heat power plants (HPP) for utilisation of excess low-grade heat of return system water and utilisation of high-grade heat of industrial steam extraction for additional electric power generation. The method of utilisation of heat of the heat power plant (HPP) includes the supply of heating performance steam from the steam turbine extractions into the steam space of the top and lower system heaters, supply of system water from consumers along the return system water pipeline into the heat exchanger cooler of system water and into the lower, and upper system heaters, supply of system water into the system water supply pipeline and pumping of the spent steam from the steam turbine into 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. The condensation unit is used which has a steam turbine condenser with production steam extraction. Utilisation of excess low-grade heat of the return system water and utilisation of high-grade heat of industrial steam extraction are performed by means of the heat engine with the closed circulation circuit, operating according to organic Rankine cycle where the cooling liquid is a low-boiling working body circulating in the closed circuit which is compressed in the condensate pump of the heat engine, heated in the heat exchanger cooler of system water, evaporated and overheated in the steam turbine condenser with production steam extraction, 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 CO.EFFECT: improvement of efficiency of heat power plant due to utilisation of excess low-grade heat of the return system water for additional electric power generation.3 cl, 1 dwg |
