LNG vaporizer is an energy-saving product, which can save a lot of energy compared with steam heating vaporizer and water bath electric heating vaporizer. The star-shaped aluminum finned tube material used in this product has the advantages of good heat exchange effect, good corrosion resistance, long service life, convenient operation and maintenance, etc. It adopts frameless rhombus connection, no welding is required between the fins, and it is fixed by tool processing. The internal stress is small, the structure is compact and firm, the arrangement is neat, and the appearance is elegant. The pipes and fittings are connected by argon arc welding, and the welds are uniform and No pores.
The LNG vaporizer is composed of finned tube bundles, and has been widely used in small and medium-sized LNG gasification stations due to the advantages of energy saving and environmental protection. The heat transfer of a single finned tube in a tube bundle will be affected by the adjacent finned tubes, which is different from the heat transfer process of a single finned tube in a large space. The traditional heat transfer design often ignores the finned tubes in the tube bundle The difference in heat transfer will cause a large error.
Discussing the heat transfer characteristics of LNG vaporizer tube bundles, modeling and solving the whole field of finned tube bundles involving fluid-solid coupling heat transfer problems, using the mixture model and Lee model to solve the heat transfer of LNG gasification in the tubes, and obtained the different The air side temperature field distribution and heat transfer coefficient of position finned tubes, the air side heat transfer difference coefficient fitting formula was established, and the fitting formula was verified by the tube bundle air side heat transfer characteristic experiment.
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