摘要 |
PURPOSE: Temperature control method and apparatus of the cofferdam of a membrane LNG carrier are provided to prevent the overheating of glycol water by controlling the flow rate of steam flowing into a steam heater according to the discharge temperature of glycol water. CONSTITUTION: A temperature control apparatus of the cofferdam of a membrane LNG carrier is as follows. The discharge temperature of glycol water, which is discharged from steam heaters(3a,3b), is measured by a temperature sensor(4). A control unit(5) controls the flow rate of steam flowing into the steam heater according to measurement sensed by the temperature sensor, prevents the overheating of the glycol water and optimizes the temperature of cofferdam. Glycol water cooled through the inner circulation of cofferdam is heated in the steam heater by steam supplied through a steam supply line(9). The heated glycol water moves to the inside of the cofferdam through the outlet line of the steam heater and heats the steel structure of the cofferdam.
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