LNG boil-off is used as fuel in the dual fuel system to produce steam in the boilers to run the turbines. Under slow maneuvering speeds, due to excessive steam being generated the __________.
• LNG (Liquefied Natural Gas) boil‑off management on LNG carriers • How dual fuel boilers and steam turbines handle excess energy at low power/speed • Normal methods of dealing with excess steam vs excess gas in a closed steam cycle
• Ask yourself: at slow maneuvering speeds, is the main problem too much gas, too much steam, or too much pressure in the boiler? • Think about what a steam turbine plant normally does with steam that is not needed for propulsion power in order to keep the plant stable and efficient. • Consider which parts of the system are normally allowed to discharge directly to the atmosphere and which are kept within a closed cycle (think about condensers).
• Verify which is more common and safer in LNG practice: venting boil‑off gas or consuming/condensing it in the plant. • Recall the function of a main condenser in a steam turbine plant and whether it is designed to receive surplus steam. • Check which option best matches a standard steam power plant operating procedure rather than an emergency safety relief action.
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