Marine impact on liquefaction processes
conference paper
In the last decade the interest for liquefied natural gas (LNG) is growing. A tendency is to produce and transport LNG on large floating vessels. One important choice in designing such a vessel is the liquefaction process. Several processes have been developed in recent years, ranging from mixed refrigerants processes, cascade processes and expander processes. Using knowledge and experience from onshore LNG liquefaction plants, the different processes can be rated to the relevance for offshore operations. Little quantitative information is available in the open literature and therefore a large number of questions remain open. TNO, a Dutch contract research, technology development and consultancy organization, has started an investigation of the rationale with respect to offshore functionalities like small footprint, efficiency, flexibility and robustness, safety, availability, and sensitivity to ship motions. The most promising candidates are the nitrogen expander processes for small capacities and the single or dual mixed refrigerant processes. The latter two processes are more sensitive to ship motions, mainly due to the type of heat exchanger (spiral wound heat exchanger). Tilting the spiral wound heat exchanger lead to a significant maldistribution of the cooling liquid on the shell side.
TNO Identifier
409237
ISSN
01972782
Source title
16th International Conference and Exhibition on Liquefied Natural Gas, LNG '16, 18-21 April, 2010, Oran, Algeria
Files
To receive the publication files, please send an e-mail request to TNO Repository.