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BACKGROUND
A reciprocating pump is a type of positive displacement pump that works on the actual displacement principle. It states that in a closed cylinder, there will always a reciprocating force will be generated whenever the pushing force of liquid takes place due to the action of a piston or cylinder. This liquid is fed to the suction side after drawing from the pump and then transferred to the discharge side of the cylinder, where it gets emptied to the delivery pipe. Both of these pipes are provided with a non-return valve, thus unidirectional flow takes place in the system. The reciprocating motion of the piston or plunger takes place due to the action of a crank or connecting rod mechanism. Both the suction and the delivery action takes place simultaneously in a double acting reciprocating pump.1
The main parts of the experimental set up of a double acting reciprocating pump are the piston and plunger which moves to and fro in the cylinder which is responsible to perform the suction and delivery strokes. Due to the unidirectional flow of liquid through the non-return valve, suction valve only allows the liquid to enter to the cylinder. Similarly, a delivery valve only permits the liquid to take discharge from the cylinder.2
The central objective of this experiment is to study the performance test of a reciprocating pump.
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REQUIREMENTS
Materials: Reciprocating pump with driving unit
Pressure Gauges
Stop Watch
Collecting Tank
Metre Scale
Tachometer
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PROCEDURE
First of all, measure all of the internal plan dimension of the collecting tank, and suction and pressure gauge level difference. After this, evaluate the speed of the pump and the energy meter. Now, start the driving unit of the experimental setup. Ensure that the delivery valve is fully closed during this process. Due to the starting of the driving unit, the water gets sucked into the suction pipe where it will lift upwards by the centrifugal action. After this, vary the delivery head by varying the pressure gauges which is fitted to the delivery pipe. The discharge will also get varied due to the variation in pressure head. Now, note down the readings of the vacuum gauge, pressure gauge, the time taken for the energy meter disc revolution, and the time taken for the rise of height (H) in the collecting tank. Alas, calculate the efficiency of the pump by using the required formula in which value is inserted from the observation table.
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CONCLUSION
The process of performing the performance test of a reciprocating pump has been discussed. These pumps are a type of positive displacement pump in which reciprocating action takes place due to the to and fro action of the piston in the cylinder.
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REFERENCES
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B. Y. C. W. B. Z. Q. Gao, “Experimental investigation on refrigeration performance of a reciprocating active magnetic regenerator of room temperature magnetic refrigerationEtude expérimentale sur la performance d’un réfrigérateur magnétique à piston fonctionnant à la température am,” International Journal of Refrigeration, vol. 29, no. 8, pp. 1274-1285, 2006.
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N. T. R. R. P. H. S. C. Arnaud Landelle, “Performance investigation of reciprocating pump running with organic fluid for organic Rankine cycle,” Applied Thermal Engineering, vol. 113, no. 3, pp. 962-969, 2017.
