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Power plant and method for generating peak power therein

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专利汇可以提供Power plant and method for generating peak power therein专利检索,专利查询,专利分析的服务。并且A power plant, such as a nuclear power plant, and a method for generating peak power therein. The power plant has a thermal accumulator installation composed of main and superheat accumulators so that after the latter are charged steam for peakpower purposes may be derived therefrom in order to operate a turbine through steam generators and superheaters connected to the accumulators through conduits which operate at different pressure-and-temperature levels. The contents of at least some of the accumulators are circulated by a circulating means a plurality of times through the latter accumulators with the circulated contents of any one accumulator being successively directed to flow paths of progressively lower pressure-andtemperature levels during successive circulations of its contents therethrough.,下面是Power plant and method for generating peak power therein专利的具体信息内容。

1. In a method for generating peak power during a discharge operation of a thermal accumulator installation of a power plant, such as nuclear power plant, which has main and superheat accumulators, the step of circulating the contents of at least some of the accumulators a plurality of times therethrough during a discharge operation.
2. In a method as recited in claim 1 and wherein the thermal accumulator installation includes a plurality of flow paths which are respectively at different pressure and temperature levels, including directing the contents of each accumulator whose contents are circulated therethrough a plurality of times successively through flow paths of progressively lower temperature and pressure levels during successive circulations of the contents of each of the latter accumulators therethrough.
3. In a method as recited in claim 1 and including the steps of superheating supply steam with the contents of a superheat accumulator during one circulation therethrough and generating supply steam with the contents of the latter superheater accumulator during the next circulation therethrough.
4. In a method as recited in claim 1 and including the steps of flashing and separating the phases of the circulated hot water of an accumulator in order to generate steam.
5. In a method as recited in claim 1 and wherein the circulated contents of an accumulator are placed in heat-exchange relationship with respect to a steam-generating medium while flowing in countercurrent thereto.
6. In a method as recited in claim 3 and including the steps of generating steam at different pressure levels with flashing and separation of the phases of the circulated contents of an accumulator at the lowest pressure level and with heat-exchange of the latter contents at a higher pressure level.
7. In a method as recited in claim 6 and including the step of forming from the circulated accumulator contents at the lowest pressure level, after heat is extracted therefrom, feedwater for a higher pressure level.
8. In a method as recited in claim 2 and wherein the power plant includes steam generators and a turbine having a plurality of stages, the steps of simultaneously discharging groups of accumulators into the steam generators and turbine stages.
9. In a method as recited in claim 8 and wherein the power plant includes flow paths at different pressure and temperature levels as well as accumulators of relatively low pressure and temperature levels and accumulators of relatively high pressure and temperature levels, the steps of simultaneously connecting both the relatively low and the relatively high pressure and temperature level accumulators to corresponding flow paths in order to achieve a rapid output of power.
10. In a method as recited in claim 1 and wherein during a discharge operation the contents of any given accumulator are circulated therethrough from 2 to 8 times.
11. In a method as recited in claim 1, the steps of extracting steam of continuously dropping pressure from a main accumulator while circulating hot water of a superheat accumulator during a first part of the discharge operation and during the last part thereof extracting from the superheat accumulator steam while feeding the latter steam into a steam supply line which communicates with the main accumulator.
12. In a method as recited in claim 1 and wherein the power plant includes main accumulators whiCh respectively operate at higher and lower pressures and superheaters for respectively superheating the steam from the latter main accumulators, the step of supplying heat first to the superheater for the higher pressure steam and then to the superheater for the lower pressure steam with the circulated contents of a superheat accumulator.
13. In a method as recited in claim 1 and wherein individual main and superheat accumulators have different charging pressures, the step of indirectly charging the latter accumulators while directing a charging medium therethrough in a sequence from higher to lower charging pressures.
14. In a method as recited in claim 1 and wherein the power plant includes superheaters and steam generators, including the step of charging the accumulator contents with the superheaters or steam generators.
15. In a method as recited in claim 14 and including the steps of directing fluid through the superheaters and steam generators in one direction during charging of the accumulators and in an opposite direction during discharging thereof.
16. In a method as recited in claim 1 and wherein the power plant includes a turbine, the step of controlling the discharge operation of a superheat accumulator according to the moisture content of the steam at the outlet of the turbine while using the permissible moisture content of the steam as a constant reference value.
17. In a method as recited in claim 1 and wherein the power plant includes a turbine, the step of controlling the discharge of a superheater according to a constant volume of operating steam flowing through part of the turbine.
18. In a method as recited in claim 1 and wherein the power plant has a constant temperature for supply steam, the step of controlling the discharge of a superheat accumulator during at least part of a discharge operation according to the constant temperature of the supply steam.
19. In a method as recited in claim 1 and including the step of setting the circulated contents of a superheat accumulator at its maximum value during the beginning of the discharge of a main accumulator to achieve a rapid rise to the operating temperature.
20. In a power plant, such as a nuclear power plant, which has a power-consuming means and supply conduit means for supplying steam thereto, a thermal accumulator installation comprising a plurality of main accumulators and a plurality of superheat accumulators, a plurality of discharge conduit means communicating with said accumulators for discharging said accumulators, and circulating means operatively connected with said accumulators and with said plurality of discharge conduit means for circulating the contents of at least some of the accumulators a plurality of times through the latter accumulators and said plurality of discharge conduit means.
21. The combination of claim 20 and wherein said plurality of discharge conduit means respectively have different temperature levels, while said plurality of accumulators respectively have different charging pressures, said circulating means including valve means for respectively connecting different accumulators with different discharge conduit means.
22. The combination of claim 21 and wherein said circulating means circulates the contents of the accumulator of lowest pressure only once therethrough.
23. The combination of claim 21 and wherein some of said valve means are operatively connected with said superheat accumulators and with discharge conduit means which communicate with some of said main accumulators for connecting said superheat accumulators to the latter discharge conduit means, respectively.
24. The combination of claim 23 and wherein the power plant includes superheaters, said circulating means including not only valve means for connecting the superheat accumulators with the discharge conduit means which communicate with some of said main accumulators, but also valve means for connecting said superheat accumulators with said superheaters, respectively.
25. The combination of claim 21 and wherein said power-consuming means is a turbine having different pressure stages, a plurality of steam generators communicating with said discharge conduit means which communicate with said main accumulators for receiving steam therefrom, and a plurality of superheaters communicating with said steam generators and with said different pressure stages of said turbine for receiving supply steam from said steam generators and delivering the supply steam to the different pressure stages of the turbine.
26. The combination of claim 25 and wherein said steam generators are flash steam generators having steam chambers communicating with said superheaters, said steam generators having water chambers, and return conduit means communicating with said water chambers of said steam generators and with said accumulators for returning to the latter water from said steam generators.
27. The combination of claim 25 and wherein at least some of said steam generators are through-flow generators through which generated steam is circulated.
28. The combination of claim 25 and wherein said steam generators include through-flow and flash steam generators connected in series, said flash steam generator having a water chamber, and a conduit communicating with said water chamber and with said through-flow steam generator for supplying to the latter feed water from the water chamber of said flash steam generator.
29. The combination of claim 28 and wherein said conduit communicating with the water chamber of said flash steam generator has a means for controlling the pressure of the fluid therein.
30. The combination of claim 20 and wherein a superheater communicates through one of said discharge conduit means with one of said main accumulators for receiving supply steam therefrom, and said circulating means continuously circulating the contents of one of said superheat accumulators through said superheater for superheating the supply steam.
31. The combination of claim 20 and wherein a plurality of superheaters respectively communicate with accumulators of different operating pressures and temperatures through said discharge conduit means for receiving supply steam therefrom and superheating the supply steam first of the highest pressure and then of the next lower pressure, and so on in countercurrent to the flow of the supply steam.
32. The combination of claim 20 and wherein at least one accumulator has in its interior a float, a conduit communicating with the float for receiving liquid from the latter accumulator during discharge thereof, and the latter conduit having a pivoted connection with the discharge conduit means which communicates with the latter accumulator to receive liquid therefrom during discharge, so that the float maintains the discharge conduit means in communication with the liquid in the latter accumulator as the liquid level falls during discharge.
33. The combination of claim 20 and wherein a superheater receives supply steam from a discharge conduit means, and at least one superheater accumulator containing a liquid of high boiling point circulated by said circulating means through the superheater for superheating the supply steam therein.
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