Cooldown of LNG Tanks – Definition and Pronunciation
What is Cooldown?
Cooldown is the operation to reduce the temperature of a cargo tank to a temperature at which it is safe to commence the loading of LNG into the tank.
Examples of Cooldown
Cooldown is the process that brings the cargo containment system to a temperature that does not cause excessive boil-off during loading and prevents thermal shock to the cargo containment system.
From “Cooldown of Cargo System on the Liquefied Gas Carriers”.
Thus, operating procedures should be used, even for fully-refrigerated tanks, to reduce the oxygen content in the tank before liquid contacts the tank shell during cooldown.
From “Minimize SCC in Liquefied Ammonia Tanks”.
The two high capacity units (90 m3/h each is a typical value for ships ranging between 135 000 and 150 000 m3 capacity), are able to produce the nitrogen, which is mainly required for the topping up of the barrier insulation spaces during loading, cooldown and other services, like vent mast fire extinguishing and compressor sealing.
From “LNG Cargo Handling Systems and Their Operations”.
Pronunciation of Cooldown
