油船货油粘温特性的加热控制策略

针对目前采用油温控制的方法油船货油无法真正反映油品运动特性的问题，搭建油船货油加热模拟实验台，运用货油粘度随温度变化的拟合公式，实现测取温度对粘度的实时转换，并以此提出货油加热控制策略。结果表明:货油粘度在初始加热阶段的下降幅度较大，加热中期变化平缓，后期经短暂波动后再缓慢下降，采用高负荷加热方式可降低加热能耗；依据加热过程粘度变化趋势及耗能可以控制货油加热量。

Viscosity Temperature Characteristics Based Heating Control Strategy for Cargo Oil in Tanker

In this paper,a test rig for determining the controlling strategy on heating the cargo oil was established to overcome the weakness of the heating method for cargo oil temperature control that cannot really reflect the characteristies of heat conveation of the oil.The fitting formula,which can accurately describe the relationship between the oil viscosity and the temperature,was employed to determine real time viscosities as per the measured temperatures.Comparison tests were then performed for evaluating the controlling strategy for heating the cargo oil in terms of temperature distribution as well as the power consumption of heating.Results show that,in the initial stage of heating,the viscosity decreases greatly,but the variation trend becomes gently in the middle heating stage,and in the later heating stage,after a short fluctuation,the viscosity decreases slowly.Results also reveal that the heating under a higher load can reduce energy consumption.It suggests that the change trend of viscosity in heating process combined with the energy consumption can be used as one of the bases for controlling the heating load.