Study On Numerical Simulation Of Longitudinal Fin Air-heating Vaporizers Heat Transfer Characteristics

With the environmental protection and energy saving policy proposed,the development of natural gas industry has received wide attention from various industries around the world.More and more LNG receiving stations have used air-heating vaporizers as green vaporizers.At present,it is an important subject for air-heating vaporizers to strengthen the theory and practice research.Based on the temperature changing curve diagram and fitting formula of thermal physical parameters of fluid in tube,prepare the corresponding thermal physical properties and natural gas phase transformation process UDF.We build the mathematical model and physical model of fin-tube,through the numerical simulation research and analysis find: The outer air temperature of the finned tube is gradually increasing from the outside of the outer wall of the fin,and the air temperature in the near wall is descending from top to bottom;The air velocity is faster in the area near the fin-tube,the air velocity in the angle region formed by the two fins and the base tube is faster;When the operating pressure and the medium flow rate increase,the flow rate of the fluid in the fin-tube is slower,while the higher the ambient temperature is,the faster the fluid gasification rate is;When the number,height and thickness of the fin increasing,the heat transfer effect is enhanced,but we need to pay attention to fin spacing,prevent the formation of frost bridge.The research results of this paper provide a theoretical basis for the independent research of air temperature gasifier,and it has engineering application significance for the realization of China's domestic research and development.