| 摘要 |
PURPOSE:To prevent the variance of a gas flow rate from influencing as the disturbance on a main pipe pressure controlling system, by allowing another evaporating device to be charged with the variance of the gas flow rate immediately when the variance of the gas flow rate occurs in one evaporating device. CONSTITUTION:A total amount A of required gas obtained in a gas main pipe pressure controller 501 is divided to two, namely, amounts of required gas for the first and the second systems, and they are defined as amounts of required gas of the first systemIand the second system II respectively. Amounts of individual required gas in systems which should be assigned to evaporating devices, EVa and EVb in respective systems are calculated on a basis of amounts of required gas in the first and the second systems and are used as gas flow rate commands to respective evaporating devices. If the flow rate of gas discharged from one of systemsIand II is changed, such operation is performed that the amount of required gas in the other system is changed to allow the other system to be charged with this change of the flow rate of gas. |
