This document discusses energy conversion devices and pumps. It provides classifications of pumps and details about reciprocating pumps. Specifically, it notes that reciprocating pumps are positive displacement pumps that use a piston-cylinder arrangement driven by a crank and connecting rod mechanism to lift liquid to a required height. Reciprocating pumps are used for low discharge and high heads in applications like fire fighting, car washing stations, and as feed water pumps in boilers. The key components of a reciprocating pump include the crank and connecting rod mechanism, piston and cylinder, suction pipe, delivery pipe, and sump. Double acting reciprocating pumps perform both suction and delivery strokes simultaneously.

1. Unit No:02
Energy Conversion Devices
Prof. Yash B. Parikh
M.Tech (Computer Integrated Manufacturing)
B.E.(Mechanical Engineering)
Assistant Professor
Department of Mechanical Engineering

2. Pumps
2

3. Pumps
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4. Applications of Pumps
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 In petroleum installations to pump oil.
 Transfer of raw materials.
 Fire fighting.
 Pumping of water in buildings.
 To pump water from source (river, lake, etc) to fields
for agricultural and irrigation purposes.
 In steam power plants, boilers to circulate feed water
and cooling water.

5. Pumps
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• The normal duty of a pump is to,
 Lift a quantity of liquid from low level to high level
and/or,
 To transfer it from one place to another place.
• In order to carry out these duties, pump has to :
i. Lift the liquid to required height against gravity
ii. To overcome the fluid resistance to flow of liquid
through the pipe.

6. Pumps
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• Pump is defined as a device which converts the
mechanical energy into hydraulic energy of fluid.
Classifications of Pumps
 There are numerous classes and categories of pumps
due to the wide variation of processes and the
distinct requirements of each application.

7. Classifications of Pumps
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8. Reciprocating Pumps
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• A reciprocating pump is a positive displacement
pump.
• Here the liquid is sucked and then displaced by a
piston-cylinder arrangement.
• This mechanism is driven to and fro by a crank and
connecting rod mechanism.
• Resulting in lifting of liquid to a required height.

9. Reciprocating Pumps
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• Used only for low discharge and high heads.
• Applications : fire fighting, car washing station, feed
water pump in boiler.

10. Elements of a Reciprocating Pumps
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It consists of,
i. Crank and connecting rod mechanism
ii. Piston and cylinder
iii. Suction pipe
iv. Delivery pipe
v. Sump

11. Double Acting Reciprocating Pumps
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• Here both suction and delivery strokes occurs
simultaneously.