The Calculation on Non-Stable Heat Transfer for Insulated oil Tank Truck

The traditional calculation of type Gl7 insulated oil tank truck was pr esented in the paper.The process of heat transfer is a non-stable process because the oil temperature in truck is decreased with the elapse of time.The calculation is taken oil tank truck as an example, the calculation methods are valuable to some liquid vessel with insulated layer, and large space in which natural heat transfer, and forced heat transfer occure.