Pump head

Head is not calculated; the pump has its own head, and the appropriate pump should be selected based on the process conditions

How to select the pump head given flow rate, pipe diameter, pipe length, etc

Calculating the head of a pump is the responsibility of the pump manufacturer; the parameters that influence this value may include electrical power, rotational speed, the size and shape of the impeller, etc. What you need to do is to determine the required head based on factors such as the flow rate and density of the medium, as well as the length and height of the pipes, and then select an appropriate pump

Head is experimental data. Reference.

First, select the flow rate and pipe length; once the flow rate is determined, the flow velocity can be fixed. After the flow velocity is set, the pipe diameter can be determined. With both the pipe diameter and length known, the resistance can be calculated, and only after that can the head requirement be determined.

The parameters of the pump itself are designed; values such as flow rate and head are not calculated. The outlet diameter of the pump is determined by the manufacturer based on the flow rate and head.

Transport height; add pipe resistance to obtain head

The original poster should first understand that the characteristics of pipelines are different from those of pumps. Corresponding to this are the pipeline characteristic curve and the pump characteristic curve. What we generally require are parameters such as flow rate and head, which are used to determine the characteristics of the pipeline. First, the flow velocity of the material within the pipe is determined using the known flow rate and pipe diameter. Then, the head loss, static head, dynamic head, and pipe resistance are calculated; the sum of these four values represents the head required to operate that pipeline. As for the characteristic parameters of the pump, they are generally determined by the manufacturer through experiments conducted at a constant speed, using clean water at 20°C as the medium and under normal pressure. The flow rate, head, and efficiency of a centrifugal pump do not change with the density of the liquid being transported. When actually selecting a pump, it is necessary to ensure that the pump is suitable for the pipeline; therefore, an appropriate pump with the right parameters must be chosen based on the known flow rate and the calculated head. Of course, the choice of model depends on the process requirements and the medium to be transported. Regarding the algorithm specifically, it is still recommended that the original poster first study chemical engineering principles on their own. If you really need reference materials, you can come to me again.

Bernoulli’s equation, as well as pipe losses, frictional losses, and inlet and outlet pressures. . . .