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Condenser cooling water-flow quantitative control unit
Condenser cooling water-flow quantitative control unit
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机译：冷凝器冷却水流量定量控制单元
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摘要
PURPOSE:To optimally control the condenser cooling water pump in terms of its efficiency by simultaneously computing the condenser vacuum level and the cooling water flow rate which maximize the plant efficiency gain by using the actual cooling pipe cleanness, and compensating the flow rate command commensurate to the deviation from the actual cooling water quantity. CONSTITUTION:A flow rate command is prepared by an initial flow rate command preparation unit 5 on the basis of signals from a power generator sensor 1 and a cooling water inlet temperature sensor 2, and, after the temperature temperature DELTAT is limitatively controlled by a flow rate command compensating unit 12 between the temperature obtained by a cooling water inlet temperature sensor 2 and the temperature obtained by a cooling water outlet temperature sensor 3, the initial control of movable vanes of a pump is performed. Then, by using the flow rate obtained by a cooling water flow rate sensor 4, afore-said temperature and the vacuum level obtained by a condenser vacuum level sensor 8, the cleanness is computed with a condenser cleanness computing unit 9. After determining the cleanness, a cooling water flow rate that maximizes the gain is computed with a cooling water flow rate computing unit 10. By feeding the deviation between said flow rate and the actual flow rate which is computed with a compensating cooling water flow rate computing unit 11, the flow rate command value is compensated so that it will be the optimum economical operation value.
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