Boil-Off Gas Reliquefaction System for LNG Carriers with BOG-BOG Heat Exchange

Helium extraction and nitrogen removal from LNG boil-off gas

Simulation study on boil-off gas minimization and recovery strategies at LNG exporting terminals

Liquefied natural gas (LNG) is becoming one of the prominent clean energy sources with its abundance, high calorific value, and low emission and price. Vapors generated from LNG due to heat leak are called boil-off gas (BOG). As world-wide LNG productions are in an increasingly growth, BOG generation and handling problems become more critical subject to more intense global competitions and stri...

Performance Analysis of Oxygen Refrigerant in an LNG BOG Re-liquefaction Plant

In this paper, an LNG BOG re-liquefaction system operating according to the Claude refrigeration cycle using oxygen as refrigerant is analysed. It includes a comprehensive exergy analysis of a BOG reliquefaction system installed onboard an LNG carrier. Commonly operating data have been used to carry out a thermodynamic analysis of the system. The system is basically made of two parts: Oxygen cy...

Process Modelling and Validation of LNG Re-Liquefaction

During transportation, there will be vaporization of LNG producing boil-off gas (BOG) and its re-liquefaction is required considering that large volume of BOG to be vented out. A cryogenic refrigeration cycle is utilized in order to re-liquefy the BOG and returns it to the cargo tank. Kapitza and claude are the usually used LNG re-liquefaction cycles. The developments in the processes adopted f...

Seismic Performance Evaluation of Boil-Off Gas Compressor in LNG Terminal

Liquefied natural gas (LNG) terminals, one of the lifeline facilities, need to be protected by a proper seismic design against extreme earthquakes. An LNG terminal consists of a series of process facilities that are connected by pipelines of various sizes. Boil-off gas (BOG) compressor is one of the critical process facilities whose failure will cause the functional failure of the LNG terminal....