The pipeline characteristic equation of the conveying system is usually expressed as
H=A+BQ
Where:
H represents the total energy required by the pipeline system for a unit mass of fluid, including potential energy and static pressure energy.
A represents the coefficient of change in resistance loss caused by changes in the inner diameter of the pipe, usually taken as
A=1.
B is the local resistance loss coefficient of the pipeline system, representing the kinetic energy required to increase per unit mass of fluid.
Physical meaning of the equation
This equation describes the total energy demand of the conveying system at a given flow rate. As the flow rate increases, the pressure head (i.e., lift) required by the pipeline will also increase, because the increase in flow rate will lead to an increase in resistance in the pipeline, which requires more energy to overcome these resistances.
Application scenarios
This equation is very important in fluid conveying systems, especially when designing and optimizing conveying systems. By analyzing this equation, the energy demand at different flow rates can be determined, so that appropriate pumps and other conveying equipment can be selected. In addition, this equation can also be used to predict and solve pressure loss problems in pipelines.
