A Study on Direct Carrying Type of Asphalt Tanker

直运式沥青罐车的研究

• 批准号: 10450378
• 负责人: NOBUKAWA Hisashi
• 金额: $ 1.47万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450378/
• 关键词: Asphalt Tanker; Thermal Styess; Finite Element Method; Phase Change; Solidification; Melting; Natural Convection; Heat Transfer

In the case of ship loading very high temperature liquid (160℃-180℃) such as asphalt, the cargo tank is generally separated from the ship structures by slider supports and thermal insulation materials in order to permit the tank to expand freely and to prevent the heat to transfer to ship structures. In such a case, for example, a 749G/T small ship, the gross tonnage and the construction cost will increase greatly with a separated type tank. In this study, we investigate the feasibility to carry the high temperature liquid cargo with a double hull structure. In the double hull carrier, the cargo tank is integrated with the inner hull to form an integrated hold to carry the high temperature liquid cargo. The, temperature distribution of a hold tank model floating in the sea is measured as it is loaded with the high temperature transmitting oil Some scantlings of the model, such as the breadth of ballast tank, the height of double hull, etc., are taken as the, same as the design ship. The heat transfer among the fluids (transmitting medium, air, etc.) and tank hulls is calculated in the natural convection state. Then the temperature distribution of the model is evaluated by the heat conduction analysis of finite element method. In addition, the numerical results of the model are compared with the measure ones to verify the validity of the numerical analyses. Finally, the thermal stresses of the design ship are computed numerically based on the temperature distribution of the model.

在船舶装载非常高温的液体（160℃-180℃）（例如沥青）的情况下，货油舱通常通过滑动支架和隔热材料与船舶结构分离，以允许油舱自由膨胀并防止热量传递到船舶结构。在这种情况下，例如749 G/T小型船，使用分离式液舱将大大增加总吨位和建造成本。本研究探讨双层船体结构载运高温液体货物的可行性。在双船体运输船中，货舱与内船体一体化，以形成一体化货舱来运输高温液体货物。测量了浮于海中的舱模型在装载高温输送油时的温度分布，并对模型的压载舱宽度、双层船体高度等构件尺寸进行了分析。都被当作是和设计船一样的。流体（传输介质、空气等）之间的传热罐壳在自然对流状态下进行计算。通过有限元法的热传导分析，计算了模型的温度分布。此外，将模型的数值计算结果与实测结果进行了比较，验证了数值分析的有效性。最后，根据模型的温度分布，对设计船的热应力进行了数值计算。