| 摘要 |
<p>A method for exploiting waste thermal energy in power plants for accomplishing a better power production efficiency than at present, whereby the waste thermal energy of medium A and return medium B are used to heat, in parallel heat-exchangers (2, 3), medium B pressurized to a pressure higher than the critical pressure using the pump (1) of the process according to the invention. After this, mediums B are combined and heated in a heat-exchanger (4) by return medium B. Next, medium B is further heated in a boiler (5) by medium A of another process cycle and expanded in a turbine (6) to a pressure lower than the critical pressure, returning to the process to the heat-exchangers (4, 3). After this, it is condensed into liquid in the condenser (7) and a new cycle is started in which it is pressurized to a supercritical pressure using the pump (1), whereby an enthalpic difference corresponding to a certain temperature difference is higher than in the pressure subsequent to the turbine (6), and the difference can be equalized by the waste thermal energy of medium A. The process according to the invention makes it also possible to economically separate the carbon dioxide generated in the combustion by burning the combustible matter by oxygen in a closed carbon dioxide cycle.</p> |
