centrifugal pump solved examples|centrifugal pump catalogue pdf : retailer The document contains 5 solved problems related to centrifugal pumps. The problems cover topics like calculating head, power required, efficiency, … In this method, hydraulic losses are mainly divided into impeller losses and volute losses in a pump. The losses in the impeller are divided into shock losses at inlet, friction loss, .
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The pump direction of rotation is specified as clockwise or anti-clockwise and is separate to the defined direction of rotation of the impeller, which, . Larger centrifugal pumps (e.g. cooling water pumps for power stations), however, are typically mated to slow-running electric drives that are very costly. Reduction gears between the drive .
Centrifugal pumps are widely used in various industries for fluid transportation and are known for their efficiency and reliability. In this article, we will explore a centrifugal pump example to understand how these pumps work and how to calculate important parameters.
The document contains 5 solved problems related to centrifugal pumps. The problems cover topics like calculating head, power required, efficiency,
Example:
A centrifugal pump has an outlet diameter equal to two times the inner diameter and is running at 1200 rpm. The pump works against a total head of 75 m. We need to calculate the velocity of flow through the impeller.
Solution:
To calculate the velocity of flow through the impeller, we can use the formula:
\[ V = \frac{Q}{A} \]
Where:
- \( V \) = Velocity of flow (m/s)
- \( Q \) = Flow rate (m\(^3\)/s)
- \( A \) = Area of the impeller (m\(^2\))
First, we need to calculate the flow rate using the formula:
\[ Q = \frac{\pi \times D^2 \times N}{4 \times 60} \]
Where:
- \( D \) = Diameter of the impeller (m)
- \( N \) = Pump speed (rpm)
Given that the outlet diameter is two times the inner diameter, we can calculate the diameter of the impeller:
Inner diameter, \( D_i = D \)
Outlet diameter, \( D_o = 2D \)
Area of the impeller, \( A = \frac{\pi}{4} \times (D_o^2 - D_i^2) \)
Substitute the values and calculate the flow rate:
\[ Q = \frac{\pi \times (2D)^2 \times 1200}{4 \times 60} \]
Next, we calculate the area of the impeller:
\[ A = \frac{\pi}{4} \times ((2D)^2 - D^2) \]
Now, we can calculate the velocity of flow using the formula mentioned earlier.
Dimensionless performance curves for a typical centrifugal pump from data given in Fig. 14.9 Fig. (14.10)
Two symmetrical inlet straight thick guide vanes were arranged in the inlet section of the centrifugal pump, and the schematic diagram of the guide vane is shown in Figure 2.The length of the vane a is 40 mm, the width b is 50 mm, the thickness c is 2 mm, the distance of the vane from the impeller inlet is 60 mm, and the offset angle between the vane and the axial .
centrifugal pump solved examples|centrifugal pump catalogue pdf