Reciprocating pumps are positive displacement pumps suitable for high heads and low flows. They deliver a pulsed flow that can be smoothed out with accumulators. A reciprocating pump consists of a piston inside a cylinder that moves back and forth, driven by a crankshaft, to draw fluid in through a suction valve and push it out a discharge valve. They are more suitable than centrifugal pumps for high heads, small discharges, and viscous liquids, but require more maintenance due to moving parts. Common applications include oil and gas production, pipelines, refineries, and chemical processing where high pressures are needed.
(disambiguation).
A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action, typically converted from electrical energy into hydraulic energy.
Hello everyone this is N Murali Mohan, working as a assistant professor in JNTUA college of engineering pulivendula, in this chapter covers the all topics, if any topics missing please inform I will correct and then upload.. thank you all
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
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We used HTML/PHP as front end and MYSQL as back end for developing our project. HTML is primarily a visual design environment. We can create a android application by designing the form and that make up the user interface. Adding android application code to the form and the objects such as buttons and text boxes on them and adding any required support code in additional modular.
MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software. It is a stable ,reliable and the powerful solution with the advanced features and advantages which are as follows: Data Security.MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software.
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Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
HEAP SORT ILLUSTRATED WITH HEAPIFY, BUILD HEAP FOR DYNAMIC ARRAYS.
Heap sort is a comparison-based sorting technique based on Binary Heap data structure. It is similar to the selection sort where we first find the minimum element and place the minimum element at the beginning. Repeat the same process for the remaining elements.
4. Reciprocating pumps are self priming and are
suitable for very high heads at low flows. They
deliver reliable discharge flows and is often used for
metering duties because of constancy of flow rate.
The flow rate is changed only by adjusting the rpm
of the driver. These pumps deliver a highly pulsed
flow. If a smooth flow is required then the discharge
flow system has to include additional features such
as accumulators. An automatic relief valve set at a
safe pressure is used on the discharge side of all
positive
5. Pumps are used to increase the energy level
of water by virtue of which it can be raised
to a higher level.
Reciprocating pumps are positive
displacement pump.
The use of reciprocating pumps is being
limited these days and being replaced by
centrifugal pumps.
These are also useful where high heads are
required with small discharge, as oil drilling
operations.
6. A reciprocation pumps consists of a plunger or a piston
that moves forward and backward inside a cylinder with
the help of a connecting rod and a crank. The crank is
rotated by an external source of power.
The cylinder is connected to the sump by a suction pipe
and to the delivery tank by a delivery pipe.
At the cylinder ends of these pipes, non-return valves
are provided. A non-return valve allows the liquid to
pass in only one direction.
Through suction valve, liquid can only be admitted into
the cylinder and through the delivery valve, liquid can
only be discharged into the delivery pipe.
7.
8. When the piston moves from the left to the right, a
suction pressure is produced in the cylinder. If the
pump is started for the first time or after a long
period, air from the suction pipe is sucked during
the suction stroke, while the delivery valve is
closed. Liquid rises into the suction pipe by a small
height due to atmospheric pressure on the sump
liquid.
During the delivery stroke, air in the cylinder is
pushed out into the delivery pipe by the thrust of
the piston, while the suction valve is closed. When
all the air from the suction pipe has been
exhausted, the liquid from the sump is able to rise
and enter the cylinder.
9. During the delivery stroke it is displaced into the
delivery pipe. Thus the liquid is delivered into the
delivery tank intermittently, i.e. during the delivery
stroke only.
10. Piston: Generally made of the mild steel
Liner: Made of Mild steel
Valves: Made of steel but a little improved from
which has the stiffen and less wear and tear are
used and brass can also b used.
11. Following are the main types of reciprocating
pumps:
According to use of piston sides
◦ Single acting Reciprocating Pump:
If there is only one suction and one delivery pipe
and the liquid is filled only on one side of the
piston, it is called a single-acting reciprocating
pump.
◦ Double acting Reciprocating Pump:
A double-acting reciprocating pump has two
suction and two delivery pipes, Liquid is receiving
on both sides of the piston in the cylinder and is
delivered into the respective delivery pipes.
12.
13. According to number of cylinder
Reciprocating pumps having more than one
cylinder are called multi-cylinder reciprocating
pumps.
◦ Single cylinder pump
A single-cylinder pump can be either single or
double acting
◦ Double cylinder pump (or two throw pump)
A double cylinder or two throw pump consist of
two cylinders connected to the same shaft.
14. According to number of cylinder
◦ Triple cylinder pump (three throw pump)
A triple-cylinder pump or three throw pump has
three cylinders, the cranks of which are set at
1200 to one another. Each cylinder is provided
with its own suction pipe delivery pipe and
piston.
◦ There can be four-cylinder and five cylinder
pumps also, the cranks of which are arranged
accordingly.
16. According to existence of air vessels
◦ With air vessels
◦ Without air vessels
17. Let
A = cross sectional area of cylinder
r = crank radius
N = rpm of the crank
L = stroke length (2r)
Discharge through pump per second=
Area x stroke length x rpm/60
This will be the discharge when the pump is single
acting.
60
N
LAQth
18.
19. Discharge in case of double acting pump
Discharge/Second =
Where, Ap = Area of cross-section of piston rod
However, if area of the piston rod is neglected
Discharge/Second =
60
)(
60
LNAAALN
Q P
th
60
)2( LNAA
Q P
th
60
2ALN
20. Thus discharge of a double-acting reciprocating
pump is twice than that of a single-acting pump.
Owing to leakage losses and time delay in closing
the valves, actual discharge Qa usually lesser than
the theoretical discharge Qth.
21. Slip of a reciprocating pump is defined as the difference
between the theoretical and the actual discharge.
i.e. Slip = Theoretical discharge - Actual discharge
= Qth. - Qa
Slip can also be expressed in terms of %age and given by
10011001
100%
d
th
act
th
actth
C
Q
Q
Q
QQ
slip
22. Slip Where Cd is known as co-efficient of
discharge and is defined as the ratio of the actual
discharge to the theoretical discharge.
Cd = Qa / Qth.
Value of Cd when expressed in percentage is
known as volumetric efficiency of the pump. Its
value ranges between 95---98 %. Percentage slip is
of the order of 2% for pumps in good conditions.
23. It is not always that the actual discharge is lesser
than the theoretical discharge. In case of a
reciprocating pump with long suction pipe, short
delivery pipe and running at high speed, inertia
force in the suction pipe becomes large as
compared to the pressure force on the outside of
delivery valve. This opens the delivery valve even
before the piston has completed its suction stroke.
Thus some of the water is pushed into the delivery
pipe before the delivery stroke is actually
commenced. This way the actual discharge
becomes more than the theoretical discharge.
Thus co-efficient of discharge increases from one
and the slip becomes negative.
24. Centrifugal Pumps Reciprocating Pumps
1. Steady and even flow 1. Intermittent and pulsating flow
2. For large discharge, small heads 2. For small discharge, high heads.
3. Can be used for viscous fluids e.g. oils,
muddy water.
3. Can handle pure water or less viscous
liquids only otherwise valves give frequent
trouble.
4. Low initial cost 4. High initial cost.
5. Can run at high speed. Can be coupled
directly to electric motor.
5. Low speed. Belt drive necessary.
6. Low maintenance cost. Periodic check
up sufficient.
6. High maintenance cost. Frequent
replacement of parts.
7. Compact less floors required. 7. Needs 6-7 times area than for centrifugal
pumps.
8. Low head pumps have high efficiency 8. Efficiency of low head pumps as low as
40 per cent due to the energy losses.
9. Uniform torque 9. Torque not uniform.
10. Simple constructions. Less number of
spare parts needed
10. Complicated construction. More
number of spare parts needed.
25. Oil and gas production
Pipeline
Refinery
Chemical processing
Power
Primary metals processing
Mining
General industry
Hydro testing
26. There is no doubt that these pump are best when it
comes to providing us with high pressure. Bus as
we have seen that there are lost of maintenance
which are required in the pump.so we can say
these pump are used in places where there is a
specific purpose of them to be used. So this was all
about the reciprocating pump.
Editor's Notes
There is a relatively large body of literature from education, psychology, and the private sector that talks about the ways that teams develop (e.g., Friend & Cook, 2003; Tuckman & Jenson, 1977). Most researchers agree that teams generally move through four stages of development. While authors assign some different names to the stages, this module uses the terms that are best known in the field: forming, storming, norming, and performing. Forming refers to the first stage of development in which teams come together and begin to identify what they want to accomplish and how they will work together. Storming refers to the second stage, in which teams encounter some differences of opinion that occasionally lead to a more uncomfortable form of conflict. In stage three, norming, teams develop strategies for working through conflict and using it in more positive and creative ways. Finally, stage four, or performing refers to the highest stage of team development in which teams are highly effective and make excellent use of creative problem solving. It is important to note that teams develop at different rates, and that not all go through the four stages in a linear way. Many effective teams develop their own identities, so that a high performing team may not use all of the structures that we typically see in a newly forming team. Finally, it is important to note that leadership is critical in team development. The leader of a stage one or two team may need to play a stronger role in helping the team establish its structure and processes. By the time a team gets to stage four, however, there is less need for one person to take responsibility for leading the team. At this stage, leadership may be shared by all team members. If possible, slides 5 – 9 should be printed as handouts so that participants can take notes on the presentation.