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Heat Insulating Materials and Application of Large-scale LNG Storage Tank

Author: MaXiaoHong
Tutor: ChenShuPing
School: Lanzhou University of Technology
Course: Refrigeration and Cryogenic Engineering
Keywords: Large-scale LNG Storage Tank Heat Transfer Calculation NumericalSimulation Heat-insulating Material
CLC: TE972
Type: Master's thesis
Year: 2012
Downloads: 451
Quote: 1
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China’s national economy has developed at a high speed, which makes thedemands of modern industry and civil use for LNG are increasingly rising. Meanwhile,the markets for LNG storing and transporting have witnessed a great development andthe tank volume used for LNG storage is developing into large size accordingly. SinceLNG has the property of being low in boiling point,small in latent heat of vaporization,inflammable,explosive and so on, to ensure that LNG is not due to the endothermic tohave much evaporation and be consumed away,it is imperative that an effective wayfor heat insulation should be adopted with a view to reducing evaporation andminimizing the loss or no-loss. The insulation technology study on large-scale LNGstorage tank aims to get a solution for high-efficiency insulation and energy-saving.The paper analyzed and researched the performance of heat-insulating materials,and compiled the commonly used heat-insulating materials in respect of thepreparation method, the performance, the advantages and disadvantages and theapplication.It has expanded on the special requests of large-scale LNG storage tank forheat-insulating materials. In addition, it has enumerated some material that are up tothe requirements but not yet applied such as VIP, EPS, XPS, silicon dioxide aerogeland so on.The paper elaborated the whole structure of large-scale LNG storage tank. Whatcomes into the focus is the analytical study on the structure, design, construction gistsof insulation. The insultion consists of three parts,that is,mineral wool at thetop,assembly of elastic mineral wool and perlite for the cylindrical shell, and perliteconcrete and foam glass brick at the bottom. The heat transfer for the tank parts wascalculated individually.Based on the analysis of the mechanism of heat insulation and the formula ofthermal leakage in each part, this paper has made theoretical calculation and numericalsimulation to the heat transfer of large-scale LNG storage tank with40000m~3, andthere is a little difference for the two methods. It shows that accurate theoreticalcalculation is difficult for complex insulator, and by contrast, numerical simulation ischaracterized by simplicity and effectiveness.

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CLC: > Industrial Technology > Oil and gas industry > Oil machinery and equipment and automation > Oil and gas storage and transportation machinery and equipment > Oil and gas database, oil and gas tank
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