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US 2009/0260584 A1Published application
Steam generator and method of adjusting flow resistance of cooling water in steam generator
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsHisato Watakabe, Tomoyuki Inoue
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Abstract
In a steam generator, a flow resistance adjusting unit for a primary cooling water is provided in an inlet nozzle provided at an incoming water chamber or an outlet nozzle provided at an outgoing water chamber.
Claims7
A steam generator comprising a hollow sealed barrel;
- a heat-transfer tube group that includes a plurality of heat-transfer tubes of an inverted U shape which is arranged inside the hollow sealed barrel and through which a primary cooling water flows;
- a tube support that is arranged at a lower part inside the hollow sealed barrel and supports ends of the heat-transfer tubes;
- an incoming water chamber that is provided at a lower end of the hollow sealed barrel and communicates with one ends of the heat-transfer tubes;
- an outgoing water chamber that is provided at the lower end of the hollow sealed barrel and communicates with other ends of the heat-transfer tubes;
- a secondary cooling-water supply channel that supplies a secondary cooling water to the hollow sealed barrel for performing heat exchange with the primary cooling water flowing in the heat-transfer tubes;
- and a flow resistance adjusting unit that is provided in at least one of an inlet nozzle provided at the incoming water chamber and an outlet nozzle provided at the outgoing water chamber.
3 more elements
A method of adjusting flow resistance of a cooling water implemented on a steam generator including a hollow sealed barrel;
- a heat-transfer tube group that includes a plurality of heat-transfer tubes of an inverted U shape which is arranged inside the hollow sealed barrel and through which a primary cooling water flows;
- a tube support that is arranged at a lower part inside the hollow sealed barrel and supports ends of the heat-transfer tubes;
- an incoming water chamber that is provided at a lower end of the hollow sealed barrel and communicates with one ends of the heat-transfer tubes;
- an outgoing water chamber that is provided at the lower end of the hollow sealed barrel and communicates with other ends of the heat-transfer tubes;
- and a secondary cooling-water supply channel that supplies a secondary cooling water to the hollow sealed barrel for performing heat exchange with the primary cooling water flowing in the heat-transfer tubes, the method comprising adjusting at least one of the flow resistance of the primary cooling water flowing into the incoming water chamber and the flow resistance of the primary cooling water drained from the outgoing water chamber, in accordance with operating condition of the steam generator.
2 more elements
Dependencies are inferred from the claim text.