Abstract
The variation of temperature over a pipeline has a major influence over viscous oil pumping.
Viscous oil transportation in non-isothermal regime, through buried pipelines, is a flow process in which intensive energy exchanges occur. Heated oil loses heat in the environment where the pipeline is assembled, but at the same time due to its friction with the pipeline's walls and to dissipated viscosity which produces in turbulent flow mechanical energy, this turns into heat.
Given such a context, the purpose of the paper is to assess the efficiency of oil transportation in non-isothermal state, and in order to achieve it we will make use of the entropic analysis of the process. Entropy is a state measurement of the process that enables the analysis of energy loss.
Entropy generation during a process is directly proportional to the available lost power.
We will show the dynamic variation of pressure and temperature in the transport process, the analysis of hydrodynamic and heat losses, as well as the entropic analysis.
