| 摘要 |
PURPOSE:To control the vacuum degree of the condenser to a target value quickly by a single adjusting operation by a method wherein the quantity of condenser cooling water with which the vacuum degree of the condenser becomes a predetermined value is operated and the opening degree of each of outlet valves is adjusted in accordance with the operated value. CONSTITUTION:The present opening degree of each of the valves, the present pressure in the condenser, the present level of water in a secondary well, the present number of operating pumps and a target pressure in the condenser are read. Next, the pressure in the condenser is compared with the target pressure to thereby determine whether the vacuum degree of the condenser is correct. In case where the vacuum degree is incorrect, the present quantity of cooling water is calculated. Then the discharge pressure of the cooling water is read again and the required opening degree of each of the outlet valves is calculated. Further, the required coefficient of resistance of each of the outlet valves for allowing the required quantity of the cooling water to flow therethrough is calculated and by using the coefficient of resistance, the required opening degree theta2 is calculated. Lastly, the opening degree of the outlet valves (8-1)- (8-n) is adjusted to the opening degree theta2. |
