What is head in a pump?

Head is the height to which a pump can raise water straight up. Water creates pressure or resistance, at predictable rates, so we can calculate head as the differential pressure that a pump has to overcome in order to raise the water. Common units are feet of head and pounds per square inch.

What is meant by pressure head and velocity head?

In fluid mechanics, energy per unit weight of fluid is termed as head. Now this energy can be in the form of pressure energy, kinetic energy or gravitational potential energy. Hence it is termed as pressure head. Similarly, the second term represents kinetic energy per unit weight. Hence it is termed as velocity head.

What does head mean in pressure?

In fluid mechanics, pressure head is the height of a liquid column that corresponds to a particular pressure exerted by the liquid column on the base of its container. It may also be called static pressure head or simply static head (but not static head pressure).

What is velocity head?

Velocity head is the kinetic portion of the head. In accordance with EN 12723, it is the kinetic energy of the fluid handled per unit weight. Alongside pressure head and geodetic height, the velocity head is determined in the Bernoulli equation (see Fluid mechanics) as follows: See Fig.1 and Fig. 2 Velocity head.

How does head relate to pressure?

In simple terms, the mathematical constant 2.31 converts a unit of energy against gravity into a unit of force against any other area. This constant converts a foot of head of water into pressure: Head in feet of water divided by 2.31 equals pressure in psi, and pressure in psi times 2.31 equals head in feet.

What is a velocity head?

Velocity head is the kinetic portion of the head. In accordance with EN 12723, it is the kinetic energy of the fluid handled per unit weight. Alongside pressure head and geodetic height, the velocity head is determined in the Bernoulli equation (see Fluid mechanics) as follows: See Fig.1 and Fig.

What is the meaning of velocity head?

Definition of velocity head : the vertical distance through which a liquid would have to fall to attain a given velocity.

What is the velocity head?

Velocity head is the kinetic portion of the head. In accordance with EN 12723, it is the kinetic energy of the fluid handled per unit weight.

What is the head pressure of a pump?

Head pressure is a specific type of pressure used in pump systems. It is a measurement of the height difference between the fluid being moved and the discharge point. For example, let’s say you have a well of water that is 2 metres underground, and you have a tap and pipe system half a metre above ground.

What is the formula of pressure head?

hp—the pressure head = u/γw—the fluid pressure divided by the unit weight of the fluid. ht—the total head = he + h.

What is velocity head measured in?

The term ½(v2/g) commonly is referred to as the velocity head and has units of height of the flowing fluid. It can be thought of as the amount of potential energy required to accelerate a fluid to its actual flowing velocity. It also is the amount of head generated when fluid velocity drops to zero.