Abstract
Road tankers for liquefied natural gas are designed as double-walled vacuum insulated tanks. The temperature difference between the fluid in the inner vessel and the environmental temperature can reachup to 200 K. Supports holding the internal vessel must be able to transfer complex mechanical loads occurring under operating conditions and at the same time minimize the heat leakage to the tank. In this paper the construction of a steel support with a composite insert for a 25 m3 tank was considered. The proposed design was tested in thermal and mechanical finite element analysis using ANSYS software.
Highlights
The demand for natural gas has been growing in recent years
The temperature distribution and average heat flux were determined for various number and dimension of steel layers under constant pressure
The papers [6,7] presents the results of numerical studies on thermal insulation systems for LNG road tankers
Summary
The demand for natural gas has been growing in recent years. This is mainly due to sustainable development and energy security. In the paper [2] various materials on internal supports for mobile cryogenic container were considered. The numerical results of heat flux and temperature distribution for materials of low thermal conductivity like PTFE, textolite, polycarbonate or polyamide were compared. The main goal of the paper was to experimentally determine the temperature distribution over time inside the polyamide supporting blocks under the constant pressure load. In the paper [5] the design and thermal analysis of multilayered internal support were presented. The papers [6,7] presents the results of numerical studies on thermal insulation systems for LNG road tankers. The authors of paper [8] presented the methodology of fatigue life calculations of LNG tank dedicated for carrier ship application. The application in 25m3 double-walled LNG road tanker was considered
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