Department of Mechanical Engineering

Faculty of Engineering

Coursework Report

Session 2011/2012

HYDRAULIC RAM PUMP

Course Code : KMEM 2110

Course Title : Elemental Design of Mechanical Design

Group Members : Mohammad Danish bin Mohammad Ali KEM 100027

Mohammad Kamal Hariz bin Che Azih KEM 100028

Mohammad Baqir bin Ali KEM 100032

Muhammad Faiz bin Jasni KEM 100033

Muhammad Firdaus bin Zarmani KEM 100035

Lecturer : Dr Mohd Faizul bin Mohd Sabri

Deadline : 20/12/2011

1

ACKNOWLEDGEMENT

In the name of Allah, first and foremost, we would like to thank Dr Mohd Faizul bin

Mohd Sabri for his guidance and support during the time we were working to complete this

project and prepare the report throughout this semester and also not to forget Miss Nurul our

beloved tutor which continuously give us support to complete the task. Besides that, we also

would like to thank our friends that help us throughout the process of this project. We are hoping

that all of you will put best consideration and evaluate this project with your entire heart.

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TABLE OF CONTENT

CHAPTER TITLE PAGE

ACKNOWLEDGEMENT

TABLE OF CONTENT

2

3

1

2

3

4

5

6

7

INTRODUCTION

1.1 Abstract

1.2 Objective

1.3 Problem Statement

LITERATURE REVIEW

2.1 Introduction

2.2 Brief history

2.3 Working principle of hydraulic ram pump

2.4 Theory on hydraulic ramp pump (Hydram)

2.4.1 Energy

2.4.2 Water Hammer Effect

2.5 Applications and limitations of hydraulic ram pumps

METHODOLOGY

3.1 Considerations in hydraulic ram pump system design

3.2 Maintenance and service life considerations

3.3 General considerations

3.4 Basic part of a hydram system

3.5 Pipe consideration

3.6 Snifter valve

CALCULATION

DESIGN

5.1 Suggestion for the future

CONCLUSION

REFERENCES

4 - 5

6 - 12

13 - 15

16 - 24

25 - 39

40

41

3

ABSTRACT

This project report is about designing a hydraulic ram pump to transfer water from a river into a

water tank with given dimensions and conditions. The hydraulic ram pump designed is believed

to be the most suitable and efficient for the given conditions based on the calculations performed.

For the first step of designing, all the related problems are listed and understand. Then, the

specifications, criteria and evaluation of the solutions are developed. This including choosing the

most suitable operational working principals for the hydraulic ram pump (hydram), outline of the

theoretical background behind the operation and its details calculations, which are being referred

to the concept and theory entitles to Fluid Mechanics. This is followed by the details drawing of

the hydraulic ram pump by using the SOLIDWORKS software. From the calculations

performed, the hydraulic ram pump designed with radius of 0.1m and length of 0.5m has high

and reasonable efficiency. Its flowrate to the delivery tank is determined to be 0.00069m3/s and

required about 20 days and 3 hours to fill completely the tank at a height of 20m from river

flow.

4

OBJECTIVES

1. To design a Hydraulic Ram Pump which is able to fill a water tank at height of 20m from

river flow.

PROBLEM STATEMENT

In this project, we are required to design a hydraulic ram pump to fill a water tank at a height of

20m from river flow. The conditions are as follows:

River Water (source): Depth = 0.5m Wide = 1.5m Flowrate = 120 l/sec

Tank (to be filled): Volume = 1200m3

Figure 1: The basic idea of the project.

5

1.5m

0.5m

20.0m

V =1200m3

Q=120l/sec

River

Hydram

Water Tank

2. BACKGROUND RESEARCH

2.1 Introduction

A hydraulic ram pump (also called hydram) is a pump that uses energy from a falling

quantity of water to pump some of it to an elevation much higher than the original level at the

source. No other energy is required and as long as there is a continuous flow of falling water, the

pump will work continuously and automatically. Provision of adequate domestic water supply

for scattered rural populations is a major problem in many developing countries. Fuel and

maintenance costs to operate conventional pumping systems are becoming prohibitive. The

hydraulic ram pump (hydram) is an alternative pumping device that is relatively simple

technology that uses renewable energy, and is durable. The hydram has only two moving parts;

these are impulse valve and delivery valve which can be easily maintained. 6

Ram Pumps have been used for over two centuries in many parts of the world. Their

simplicity and reliability made them commercially successful, particularly in Europe, in the days

before electrical power and the internal combustion engine become widely available. As

technology advanced and become increasingly reliant on sources of power derived from fossil

fuels, the ram pump was neglected. It was felt to have no relevance in an age of national

electricity grids and large - scale water supplies. Big had become beautiful and small-scale ram

pump technology was unfashionable.

In recent years an increased interest in renewable energy devices and an awareness of the

technological needs of a particular market in developing countries have prompted a reappraisal

of ram pumps. In hilly areas with springs and streams, the potential for a simple and reliable

pumping device is large. Although there are some examples of successful ram pump installation

in developing countries, their use to date has merely scratched at the surface of their potential.

The main reason for this being, lack of wide spread local knowledge in the design and

manufacture of ram pumps. Hence, the wide spread use of ram pumps will only occur if there is

a local manufacturer to deliver quickly; give assistance in system design, installation, and

provide an after-sales service.

2.2 Brief History

In 1772 John Whitehurst of Cheshire in the United Kingdom invented a manually

controlled precursor of the hydraulic ram called the "pulsation engine". The first one he installed,

in 1772 at Oulton, Cheshire, and raised water to a height of 16 ft (4.9 m). He installed another in

an Irish property in 1783. He did not patent it, and details are obscure, but it is known to have

had an air vessel.

The first self-acting ram pump was invented by the Frenchman Joseph Michel

Montgolfier (best known as a co-inventor of the hot air balloon) in 1796 for raising water in

his paper mill at Voiron. His friend Matthew Boulton took out a British patent on his behalf in

1797. The sons of Montgolfier obtained an English patent for an improved version in 1816, and

7

this was acquired, together with Whitehurst's design, in 1820 by Josiah Easton, a Somerset-born

engineer who had just moved to London.

Easton's firm, inherited by his son James (1796–1871), grew during the nineteenth

century to become one of the more important engineering manufacturers in the United Kingdom,

with a large works at Erith, Kent. They specialized in water supply and sewerage systems world-

wide, as well as land drainage projects. Eastons had a good business supplying rams for water

supply purposes to large country houses, and also to farms and village communities, and a

number of their installations still survived as of 2004.

The firm was eventually closed in 1909, but the ram business was continued by James R

Easton. In 1929 it was acquired by Green & Carter, of Winchester, Hampshire, who were

engaged in the manufacturing and installation of the well-known Vulcan and Vacher Rams.

The first US patent was issued to J. Cerneau and S.S. Hallet in 1809. US interest in hydraulic

rams picked up around 1840, as further patents were issued and domestic companies started

offering rams for sale. Toward the end of the 19th Century, interest waned as electricity and

electric pumps became widely available.

By the end of the twentieth century interest in hydraulic rams has revived, due to the

needs of sustainable technology in developing countries, and energy conservation in developed

ones. A good example is AID Foundation International in the Philippines, who won an Ashden

Award for their work developing ram pumps that could be easily maintained for use in remote

villages. The hydraulic ram principle has been used in some proposals for exploiting wave

power, one of which was discussed as long ago as 1931 by Hanns Günther in his book in hundert

Jahren.

2.3 Working Principle of Hydraulic Ram Pump

Although hydraulic ram pumps come in a variety of shapes and sizes, they all have the same

basic components as shown in Fig. 2. The main parts of a ram pump are hydram body, waste

valve, delivery valve, snifter valve, air chamber and relief valve. Ram Pumps have a cyclic

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pumping action that produces their characteristic beat during operation. The cycle can be divided

into three phases; acceleration, delivery and recoil.

Acceleration - When the waste valve is open as shown in figure 2, water accelerates down the

drive pipe and discharges through the open valve. As the flow increases it reaches a speed where

the drag force is sufficient to start closing the valve. Once it has begun to move, the valve closes

very quickly.

Delivery - As the waste valve slams shut as shown in figure 3, it stops the flow of water through

it. The water that has been flowing in the drive pipe has considerable momentum which has to be

dissipated. For a fraction of a second, the water in the body of the pump is compressed causing a

large surge in pressure. This type of pressure rise is known as water hammer. As the pressure

rises higher than that in the air chamber, it forces water through the delivery valve (a non-return

valve).The delivery valve stays open until the water in the drive pipe has almost completely

slowed and the pressure in the pump body drops below the delivery pressure. The delivery valve

then closes, stopping any back flow from the air vessel into the pump and drive pipe.

9

No Pressure

High Velocity

Figure 2: Showing the flow of water in the hydram body.

Recoil - The remaining flow in the drive pipe recoils against the closed delivery valve - rather

like a ball bouncing back. This causes the pressure in the body of the pump to drop low enough

for the waste valve to reopen. The recoil also sucks a small amount of air in through the snifter

valve. The air sits under the delivery valve until the next cycle when it is pumped with the

delivery water into the air vessel. This ensures that the air vessel stays full of air. When the recoil

energy is finished, water begins to accelerate down the drive pipe and out through the open waste

valve, starting the cycle again. Throughout the cycle the pressure in the air vessel steadily forces

water up the delivery pipe. The air vessel smoothes the pulsing in flow through the delivery

valve into an even outflow up the delivery pipe. The pumping cycle happens very quickly,

typically 40 to 120 times per minute. During each pumping cycle only a very small amount of

water is pumped. However, with cycle after cycle continuing over 24 hours, a significant amount

of water can be lifted. While the ram pump is operating, the water flowing out the waste valve

splashes onto the floor or the pump house and is considered' waste' water. The term' waste' water

needs to be understood. Although waste water is not delivered by the ram pump, it is the energy

of this water that pumps the water which is delivered.

Figure 3: Flow of water when waste valve is closed.

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No Velocity

Very High Pressure

2.4 Theory on Hydraulic Ramp (Hydram) Pump

2.4.1 Energy

Cars, airplanes, light bulb, water pumps, computers, the human body have all something in

common: they need energy to work. This energy can come from many sources such as

electricity, fuel, manpower, food. Different technologies are used to transform one source of

energy to another. For example, car engines transform the chemical energy of the fuel into

mechanical energy allowing wheels to rotate. Another example related to water supply projects is

electric pumps: they use electricity to transform electrical energy into potential energy of the

lifted water. The potential energy is the energy of every object due to its altitude. The object

needs another source of energy to be lifted and will lose its potential energy if it falls. Hydrams

are designed to lift water (i.e. give potential energy to the water) from a low cost source of

energy. Avoiding using fuel and electricity, the water hammer effect has shown to be efficient

and is the principle of hydrams.

2.4.2 Water Hammer Effect

The water hammer effect is a phenomenon that increases the pressure of water in a pipe over a short period of time.

11

Figure 4: Water hammer effect.

If the velocity of the water in a pipe is high enough, a fast closure of the pipe will cause a water

hammer effect as shown in Figure 4. The water flowing will be compressed to the valve which

has been closed suddenly. As a comparison, if a hundred people run very fast in a corridor and

suddenly, they face a closed door, the space between them will be reduced, everybody will touch

each other. In the same way, with velocity, water has kinetic energy. By closing quickly the pipe,

this kinetic energy will be transformed into pressure. This effect is characterized by a loud noise

that is similar to a hammer banging a metal component.

2.5 Applications and limitations of hydraulic ram pumps

For any particular site, there are usually a number of potential water lifting options. Choosing

between them involves consideration of many different factors. Ram pumps in certain conditions

have many advantages over other forms of water-lifting, but in others, it can be completely

inappropriate. The main advantages of ram pumps are:

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Use of a renewable energy source ensuring low running cost

Pumping only a small proportion of the available flow has little environmental impact.

Simplicity and reliability give a low maintenance requirement

Automatic, continuous operation requires no supervision or human input.

The main limitations are:

They are limited in hilly areas with a year-round water sources

They pump only a small fraction of the available flow and therefore require source flows

larger than actual water delivered

Can have a high capital cost in relation to other technologies

Are limited to small-scale applications, usually up to 1KW, but this requires economical and

other considerations.

Specific situations in which other technologies may prove more appropriate are:

In terrain where streams are falling very rapidly, it may be possible to extract water at a point

above the village or irrigation site and feed it undergravity. If the water requirement is large

and there is a large source of falling water (head and flow rate) nearby, turbine-pump sets can

provide the best solution. Many ram pumps could be used in parallel to give the required

output but at powers over 2KW, turbine-pump systems are normally cheaper.

In small-scale domestic water supply, the choice can often be between using a ram pump on

a stream or using cleaner groundwater. Surface water will often need to be filtered or treated

for human consumption, increasing the cost of a system and requiring regular filter

maintenance. Under these conditions, to select a hydram pump, economical considerations

compared to other technologies have to be looked at.

3. DESIGN METHODOLOGY FOR HYDRAM PUMP

3.1 Considerations in hydraulic ram pump system design

The following factors need to be considered in hydraulic Ram pump system design.

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Area suitability (head and flow rate)

Flow rate and head requirement

Intake design

Drive system

Pump house location

Delivery pipes routing

Distribution system

3.2 Maintenance and service life considerations:

The critical parts that require frequent maintenance are bolts, studs and nuts. Therefore, it is

usually preferable to have stainless steel bolts, studs and nuts, even though they are costly and

difficult to source.

3.3 General considerations

Shape of hydram has little effect on performance

Valve design considerations. The correct design of valves is a critical factor in the overall

performance of ram pumps. Hence, this needs special consideration.

Strength considerations. This determines thickness of hydram body and air chamber.

3.4 Basic Part of a Hydram system

From the figure it shows a typical hydraulic ram installation that comprises

Supply

Supply pipe (drive pipe)

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Impulse valve/ waste valve/snifter valve

Delivery valve

Air chamber

Delivery pipe

Figure 5: Sketch on basic part of hydram.

3.5 Pipe consideration

For all pipes being used and the hydram body, the material that we suggested is commercial

steel pipe based on the following reason:

Strength and flexibility

high resistance to direct heat

15

Resistant to very high pressures

Easy to install, maintain, operate and connect

Perfect for the extension work in pumping stations, riverbanks, steep sloping crossings

and reservoirs

Feature of withstanding traffic vibrations and shocks

Specifically, the types of steel pipe we suggest to use is Galvanized steel since this type of steel

is coated with zinc layer to protect steel pipes from corroding. This form of steel provides

resistance to corrosion and rust thereby making it highly preferred to make pipes. This also helps

in increasing the overall life term of the pipe fittings as well.

3.6 Snifter valve

It is a device to allow the air to enter the air vessel located above delivery valve but below

delivery pipe. Is it very important for air to enter because air in the air vessel mixes with water

while hydram is running. As a result, the volume of air in the air vessel decreases and this will

bring about the reduction in the pump’s efficiency, thus it is important to have snifter valve. In

short, snifter valve enable the maintenance of a necessary air level inside the air vessel.

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4. CALCULATION

Specification of the hydram pump

1. From the given condition, we know that the flowrate, Qr and the area, Ar of the river is given

as below,

Flowrate of river, Qr = 120 l /s

= 0.12 m3/s

Area of river, Ar = 0.5 m ×1.5 m

= 0.75 m2

2. Using the information earlier we can find the velocity, vr of the river using continuity

equation.

Qr=A r vr

0.12 m3/s=(0.75 m2 ) vr

v=0.16 m /s

Where,Qr = flowrate of the river (m3/s ¿ Ar = cross sectional area of the river (m2¿vr = velocity of the river (m/s)

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Description Details

Available Flow rate (Q) 120l /s

Supply Head (h) 4m

Expected Lift from river (H d) 20m

Height of Tank from pump (H) 24m

Diameter of supply pipe (d s) 0.1 m

Diameter of delivery pipe (dd) 0.06m

Length of supply pipe (Ls) 20m

Length of delivery pipe (Ld) 30m

3. We also know that the velocity, vs entering the supply is same with the velocity, vr of river.

From that, we can use continuity equation to find the flowrate in the supply pipe.

vs=vr=0.16 m /s

d s=0.1 m

Qs=A s v s

Qs=π4

(0.1 )2 (0.16 )

Qs=1.257 ×10−3 m3/s

Supply flow rate, Qs=1.257 ×10−3 m3/s just 1% from river flowrate

Where,vs and vr = velocity in supply pipe and in river respectively (m /s)d s = diameter of supply pipe (m)Qs=¿ flowrate in the supply pipe

4. Next we are going to find the number of beats in the process. Number of beats is the frequency

of closing and opening of valve. We assume that both waste and delivery valve has the same

frequency i.e. they both open and close at the same amount of time.

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Figure 6: The velocity-time relationship in the driveline of a hydram.

But first we need calculate vmaxthe max velocity of water in hydram,

vmax=√ 2 g hs

M

Where

hs = height of supply tank (river) from hydram, 4m

M = head loss coefficient, 0.104

g = acceleration due to gravity, 9.81 m/s2

vmax=√ 2 ( 9.81 ) ( 4 )0.104

vmax=27.47 m/ s

t 1=L1 xvmax

( H d−h ) g

based on the empirical relation between head of supply and the length of supply, it is suggested

that L1 = 2.5 H

L1 = 2.5m x 4 = 10m

19

t 1=10 x27.47

(20−4 ) 9.81

t 1 = 1.75 s

t 2=L2 xv max

( H d−h ) g

t 2=0.5 x27.47

(20−4 )9.81

t 2 = 0.18 s

Where,

L1 = length of supply based on empirical head and the length of supply

L2 = length of hydram

t 1 = time take for impulse valve to close or delivery valve to open

t 2 = time taken for delivery valve to close

H d = height of tank from river

h = supply head

vmax = maximum velocity

One beat is equal to t 1+ t 2

1 beat = 1.75 s + 0.18 s

= 1.92 s

≈ 2 s

Since n is the number of beat per minute

n=602

n = 30 beats

20

5. We then calculate the flowrate of the water flowing at waste valve.

Qw=π r2 Ln60

where

Qw = flowrate of waste water

r=¿ the radius of waste valve

L=¿ The length of hydram

n=¿ Number of beat

r=0.026 m

L=0.5 m

n=30

Qw=π (0.026 )2 (0.5 ) 3060

Qw=0.0005 m3 /s

6. Next we calculate the head loss coefficient.

M= fLd

v2

2 g

where

M=¿ head loss coefficient

f =¿ Darcy-Weibach Formula friction factor

L=¿ length of supply pipe line

d=¿ diameter of supply pipe

v=¿ velocity in supply pipe

g=¿ acceleration due to gravity, 9.81 m /s2

21

We have decided to use commercial steel pipe for both supply and delivery pipe. From that we

find that the commercial steel has sand roughness, e=4.5 ×10−5 (m). Thus with 0.1 m diameter

of supply pipe and sand roughness of the pipe, we get

ed=4.5 x10−5

0.1=4.5 x10−4

Then we calculate the Reynolds’s Number,

ℜ= ρvdμ

Where,

Re = Reynolds’s number (dimensionless number)

ρ = density of the fluid (kg/m³)

v = mean velocity (m/s)

d=¿diameter of pipe (m)

μ = dynamic viscosity of the fluid (kg/ms)

Here we have,

ρ = 1000 kg/m³

v = 0.16 m/s

d=¿0.1m

μ = 0.000798 kg/ms for water at 30oc

22

Therefore,

ℜ=1000 x 0.16 x0.10.000798

Re = 20050

So using the value obtained, we then find the friction factor for the pipe by referring the value of

Re and the ratio of sand roughness to diameter of pipe in moody’s diagram and we find that f in

this case to be 0.4.

Finally we can now calculate head loss coefficient, M.

M=fLd

v2

2 g

f =0.4

Ls=20 m

d s=0.1 m

vs = 0.16 m/s

g = 9.81 m /s2

M=(0.4 ) 200.1 [ (0.16 )2

2 (9.81 ) ]M=0.104

7. Next, we will find volume of waste water (Vol )w

(Vol )w=Ls A s

Mlog( 1

1−μ )We have,

H d = height of delivery tank from water source (river), 20m

Ld=¿ length of delivery pipe from hydram, 30m

dd=¿ diameter of delivery pipe, 0.06 m

23

Ls = length of supply pipe, 20m

d s = diameter of supply pipe, 0.1m

vmax = 27.47 m/s

M = head loss coefficient, 0.104

μ=M vmax

2

2 gH d

μ=(0.104 ) (27.47 )2

2 (9.81 ) (20 )

μ=0.2

(Vol )w=(20 )( π

4(0.1 )2)

0.104log( 1

1−0.2 )(Vol )w=0.146 m3

8. Then we calculate the volume of delivered water (Vol )d,

(Vol )d=Ld Ad

Mln (1+β )

β=M vmax

2

2 g H d

β=(0.104 ) (27.47 )2

2 ( 9.81 ) (20 )

β=0.2

(Vol )d=(30 )( π

4(0.06 )2)

0.104ln (1+0.2 )

(Vol )d=0.202 m3

9. The delivery flowrate can be calculated as below,

24

Qd=Qw× (Vol )d

(Vol )w

Where,

Qd = delivery flowrate (m3/s ¿

Qw = waste flowrate (m3/s ¿ obtained earlier, 0.0005 m3/s

Qd=(0.0005 ) (0.202 )

0.146

Qd=0.00069 m3/s

10. The efficiency of hydram can be defined as below using D’Rankine formula,

E ( Rankine )=Q∗hd

(Q+Qw ) ( H )

Q=Q d=0.00069m3/ s

Qw=0.0005 m3 /s

H d=20m

H = (hd+ hs) = (20 +4) = 24m

E=0.00069(20)

(0.00069+0.0005 ) (24 )

E = 0.483

Therefore the efficiency of hydram is 48.3 %.

Size of Tank = 1200 m3

25

Pumping rate = 1200 m3

0.00069 m3 /s

= 1739130.435 s

= 20 days∧3 hours∧6 minutes

5. DESIGN

When we design a water system using ram pumps, we like to know before we build it,

how much water it will deliver to how much head and with what efficiency manually

manipulating these parameters using design methodology for different input parameters. After

that, we then design the hydram using SOLIDWORKS software which a CAD (computer aided

design) software as below.

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Figure 7: Isometric view of the hydraulic ram pump

27

Figure 8: Side view of the hydraulic ram pump

28

Figure 9: Cross-sectional view of the hydraulic ram pump

29

Figure 10 (a): Sectional view of delivery valve

30

Figure 10 (b): Sectional view of delivery valve

31

Figure 11: Outer view of delivery valve

32

Figure 12: Cross-sectional view of waste valve

33

Figure 13 (a): Sectional view of waste valve

34

Figure 13 (b): Sectional view of waste valve

35

Figure 13(c): Outer view of waste valve

36

37

Parts Descriptions Quantity

Formed Hex Screw

ANSI B18.2.3.2M

M10

1) Length : 100 mm

3 Pieces

2) Length : 80 mm

4 Pieces

3) Length : 70 mm

10 Pieces

4) Length : 35 mm

1 Piece

Total : 18 Pieces

Hex Jam Nut

ANSI B18.2.3.5M

M10

23 Pieces

Total : 23 Pieces

Narrow Flat Washer

ANSI B18.22M

M10

38 Pieces

Total : 38 Pieces

38

39

Parts Material Quantity

Rubber 2 Pieces

Total : 2 Pieces

Rubber 2 Pieces

Total : 2 Pieces

40

Rubber 2 Pieces

Total : 2 Pieces

Rubber 2 Pieces

Total : 2 Pieces

Steel 2 Pieces

Total : 2 Pieces

5.1 SUGGESTION FOR FUTURE

One of the suggestion that can be apply is to use a bigger supply pipe to obtain a large

amount of water so that more water can be delivered to tank. In this report we use supply pipe

with diameter of 0.1m, and we get only about 1.257 ×10−3 m3/ s flowrate and it is just about 1%

of compared to the river’s flowrate. Bigger supply pipe will increase the flowrate, but we also

need to increase size of hydram to cope with bigger force that the water carries. It is not

necessary to increase the delivery pipe because referring to continuity equation, the flowrate

across a pipe is same. Since we already increase the flowrate of water by increasing the diameter

of supply pipe, thus with the same diameter of delivery pipe we can get achieve a higher velocity

of water flowing to the tank. But if we increase the diameter of supply pipe tremendously we

may also need to increase the delivery pipe diameter so that more water can be delivered with

high velocity.

We can also try to build a tank near the river to store the water collected from river. This

is for us manipulate the velocity of water flowing since we cannot do anything to the river. We

know from continuity equation that the property that is shared between the river, and water

flowing to supply pipe is the velocity. So if we find any solution to increase the velocity, we

could increase the flowrate in the pipe thus increasing the pumping rate of the hydram.

For the most optimum performance of the hydram is to apply both of the suggestion but

we need first to consider the necessity of such high pumping rate according to usage of the water

delivered. If we were able to deliver a lot of water to the tank, but later we will only just use

some of it, then it will be a waste and will cost us high. Thus we first need to identify the

necessary amount of water needed. From there we try to adjust so that we can fulfill the demand

with the minimum cost.

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6. CONCLUSION

From the objective stated, we have come out the solutions from the study of our hydraulic ramp

pump (hydram), the modifications and assumptions made were counted and the calculations give

the exact answers for this project.

From the results obtained, we have found out that:-

a) The best design for our hydram is as shown above in the report.

b) In order to obtain the best efficiency for this hydram, the optimum supply head and

delivery and supply pipe length is chosen. The efficiency of the hydram is about 48.3%.

c) By theory we found that the pumping rate has been found out that is to be 0.00069 m3/s.

d) And finally, the time taken for the whole tank to be filled is estimated to be 20 days, 3

hours, and 6 minutes.

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7. REFERENCES

1) DTU Ram pumps program publication published by university of Warwick.

2) Phyo Min Than, 2008, GMSARN International Conference on Sustainable Development:

Issues and Prospects for the GMS, Construction and Performance Testing of the

Hydraulic Ram Pump.

3) Prof. Ma Chi of zhejiang University of Technology and Dipl. Eng. Peter Diemer of

Bremen Overseas Research and Development Association, 2002, Hydraulic Ram

Handbook.

4) David, J.P. and Edward, H.W., 1985, Schaum's Outline of Theory and Problems of Fluid

Mechanics and Hydraulics, SI (Metric) Edition, McGraw-Hill Book Company,

Singapore.

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