A Solar Collector In The Application Of Liquefied Natural Gas

With the development of our society, a large number of imported. LNG which play an important role in optimizing the energy structure of China. Special storage and gasification equipments,which are LNG-related equipments, have also become a hot academic. There are some types of LNG receiving station, but solar energy is rarely usd to gasifiy LNG directly. Compared with the traditional vaporizer. U-tube all-glass vacuum tube solar gasifier has many advantages, like has a light structure, easy be installed and unloaded,be fit for the occasion of a small gas consumption; but also has some specificities. For example, the absorption rate and thermal efficiency of all-glass vacuum tube under solar radiation intensity, U-tube structural arrangement, U-tube have a dynamic balance with the phase transition process, and the rate of gas of the exit, etc.First, the thesis Theory established model of U-tube solar collector, the use of thermal resistance figure was to determine the equation of the thermal efficiency of collector, the total heat loss coefficient and efficiency factor of the collector, phase change phenomena of U-tube, and the enhancement Boiling heat transfer phenomenon may exist flow pattern, and the changing of heat transfer coefficient to the influence of gasification process.Analyzed the fluid flow and heat transfer process of the solar U-tube in the vaporizer, a multi-phase flow mathematical model was established,made sure fluid parameters and boundary conditions and UDF program of phase transition, provided basis of the numerical calculation for the next step.By numerical simulation of U-solar vacuum tubes vaporizer, Analysis of the tube fluid flow and heat transfer conditions gasification, the influence of the structure and operating parameters of U-tube solar gasification were discussed, described two-phase distribution and flow of the U-tube, and obtained the factors which affecting the rate of gas.Through comprehensive analysis of the gasification system, and consummated the process of LNG from gasification to heating, ultimately, gained the gas of room temperature for users. In the model of the process, used the method of variable physical properties parameters to consider the influence of uplift. Finally, analyzed its economic and environmental benefits.