高流動点油の加熱による溶融と熱拡散について

概要

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Recently, a large quantity of high pour point crude oil is imported into Japan from Indonesia and China. The oil tankers carrying high pour point oil have to equip with the oil heating system taking account of pour point and characteristics of viscosity on temperature. Occasionally, the accident of oil solidification occurs during pumping up cargo oil from an oil tank of tanker to land for the sake of unsuitable oil heating system. In order to investigate the heat transfer with moving solid phase boundary in high pour point oil, spreaded melting zone and oil temperature by using paraffin are measured in quasitwo dimensional tank with heaters. Further, two dimensional numerical analysis is carried out on the condition in which heat convection in liquid phase and heat conduction in solid phase coexist together. The decisive factors governing heat transfer are the arrangement of heating coils, the supplied heat quantity and the surrounding temperature. The relation between these factors and distribution of oil temperature or growth of melting zone are clarified which are useful for design of oil heating system.
社団法人日本船舶海洋工学会の論文