LNG Recondenser Systems
Study how a recondenser uses subcooled LNG to absorb and condense BOG while supporting stable suction conditions for high-pressure sendout pumps.
System context
BOG recovery and sendout
Technical topic pages show the knowledge scope behind LNG University learning. Course, assessment and credential availability depends on the applicable program.
Relevant roles
Regasification operators · Control-room personnel · Process engineers
Prerequisites
BOG management · Regasification fundamentals
Knowledge level
Intermediate technical coverage with system and operational context.
Learning outcomes
What this topic is intended to help you understand
- Explain the role of the recondenser between BOG and liquid sendout systems.
- Identify the importance of liquid level, pressure and LNG-to-gas balance.
- Recognize interactions with BOG compressors and HP pumps.
Technical scope
Equipment, concepts and terminology
- Vessel arrangement
- BOG inlet
- LNG inlet
- Level control
- Pressure control
- Liquid outlet
- Mixing and condensation
Operating context
How the topic connects to plant operation
- Maintaining operating inventory
- Balancing BOG flow and LNG flow
- Responding to sendout changes
- Avoiding unstable level or pressure
Safeguards and controls
Protection and risk-control context
- High and low level protection
- Pressure relief
- Pump suction requirements
- ESD isolation
Technical learning does not replace site procedures, OEM documentation, engineering calculations, permits, supervision or facility-specific authorization.
Engineering documents
Documents commonly connected to this subject
- PFD
- P&ID
- Control narrative
- Cause & effect chart