高流動点原油積タンカーの船底凝固層と熱貫流について : その2 船底部の熱貫流

概要

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The supplied quantity of heat energy for keeping in low viscosity of loading oil is necessary to be estimated with accuracy in a tanker carrying high pour point oil or high viscous oil. It is difficult to assume it exactly, because the heat transfer coefficient through tank bottom is various due to depending on the configulation of bottom structure and the physical properties of loading oil. In order to investigate the heat transfer through tank bottom, the measurement of heat flux is carried out using the tank in the shape of bottom structure on the scale of one-third in which the paraffin as one kind of high pour point oil and the high viscous lubrication oil are heating up with three heaters, The predicting formulae on variable thickness of solidified oil and heat flow at bottom as time proceeds are derived from the theory and the experimental values. These formulae are applied for estimating the heat transfer coefficient of actual ship. As the results, the heat transfer coefficients through tank bottom excepting the effect of ship oscillation are assumed to be 7-8W/m^2K for high viscous oil and 4.7W/m^2K for high pour point oil.
社団法人日本船舶海洋工学会の論文
1987-06-00