CONCLUSIONS

 

After completing this report we conclude that the experiment is a success, with all the objective set is achieve with flying colors. This is done with the aid of the lab instructor and the lab assistant.

 

The conclusion that we made that with an increased of speed of the pump it will cause the properties and characteristic to varied accordingly which in turn effect the overall efficiency, and with the increased of speed it is relevant that the efficiency also increased. The maximum operating condition is at 90% pump speed, where the efficiency is 40% at 1.7 m³/s capacity this is called BEP.

 

We need to keep in mind that this is an experiment and the value could not be achieved due to some unavoidable factor such as the condition of the experiment where the apparatus is not in a good working  condition and the experiment is conducted not under a standardize condition.

 

Overall the students that participate in the experiment got the general idea of the experiment.

 

 

 

PERSONAL CONCLUSION

 

 

The performance of a centrifugal pump can be shown graphically on a characteristic curve. A typical characteristic curve shows the total dynamic head, brake horsepower, efficiency, and net positive Suction head all plotted over the capacity range of the pump.

 

Non-dimensional curves which indicate the general shape of the characteristic curves for the various types of pumps. They show the head, brake horsepower, and efficiency plotted as a percent of their values at the design or best efficiency point of the pump.

 

The head curve for a radial flow pump is relatively flat and that the head decreases gradually as the flow increases. Note that the brake horsepower increases gradually over the flow range with the maximum normally at the point of maximum flow

 

The performance or characteristic curve of the pump provides information on the relationship between total head and flow rate. There are three important points on this curve.

 

1. The shut-off head, this is the maximum head that the pump can achieve and occurs at zero flow. The pump will be noisy and vibrate excessively at this point. The pump will consume the least amount of power at this point.

 

2. The best efficiency point B.E.P. this is the point at which the pump is the most efficient and operates with the least vibration and noise. This is often the point for which pump’s are rated and which is indicated on the nameplate. The pump will consume the power corresponding to its B.E.P. rating at this point.

 

3. The maximum flow point, the pump may not operate past this point. The pump will be noisy and vibrate excessively at this point. The pump will consume the maximum amount of power at this point.

 

Sometimes the characteristic curve will include a power consumption curve. This curve is only valid for water, if the fluid has a different density than water you cannot use this curve. However you can use the total head vs. flow rate curve since this is independent of density.

Typical centrifugal pump characteristic curve.

 

If your fluid has a different viscosity than water you cannot use the characteristic curve without correction.