Abstract
The use of cryogenic liquefied gasses in industry is constantly increasing both for process purposes and for power supply needs. The liquefied natural gas (LNG) is stored at cryogenic temperature and its immediate use in gaseous form requires its evaporation. The heat needed to cause a phase change is usually delivered by means of vaporizers. This paper presents a numerical analysis of the influence of the fins number and frost accumulated within the fins surface on the heat transferred through the aluminum finned tubes of LNG ambient air vaporizers. The calculations were carried out applying finite element thermal analysis within Ansys software as well as using an analytical approach. As a result, the heat rate per unit length of the finned tube was obtained. The results were compared for different numbers of longitudinal fins both without frost and for total frosting of the tubes.
Highlights
Natural gas in liquid form is commonly known as liquefied natural gas (LNG)
computational fluid dynamics (CFD) analysis results of the ambient air vaporizer finned tube of the one meter length were presented by the authors of paper [9]
In the paper [10], the CFD analysis was involved in order to verify the experimental results concerning heat transfer through the outer surface of longitudinal finned tube made of aluminum
Summary
Natural gas in liquid form is commonly known as LNG. It has a number of advantages and its use continues to increase both for stationary and mobile applications. CFD analysis results of the ambient air vaporizer finned tube of the one meter length were presented by the authors of paper [9]. In the paper [10], the CFD analysis was involved in order to verify the experimental results concerning heat transfer through the outer surface of longitudinal finned tube made of aluminum. Longitudinal finned tubes of ambient air vaporizers are placed at specific distances from each other This distance provides a space for the airflow, and is a space where the frost is accumulated. The layer of frost which covers the tube ca Longitudinal finned tubes of ambient air vaporizers are placed at specific distances from irregular outline of the outer surface.
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