design and analysis of pipeline and distribution system

8/8/2019 Design and Analysis of Pipeline and Distribution System

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DESIGN AND ANALYSIS OF

PIPELINE AND DISTRIBUTION

SYSTEM

PRSENTED BY

PRASANNA KUMAR


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INTRODUCTION

TRUNK MAINS

PRINCIPAL FEEDER MAINS DISTRIBUTION MAINS


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FACTORS SIZE OF MAIN

FUTURE DEMAND AND ITS RATE OF RISE

ROUTES ARE POSSIBLE FOR 2 PIPELINES WHETHER 2 PIPELINES WOULD OFFER

BETTER SECURITY FOR MAINTENANCE OFSUPPLIES

PIPELINE PLANNIG

DESIGN OF PUMPING MAIN

USE OF DISCOUNTING


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X+X/(1+r)n < 1.3 X

THIS SHOWS THAT

1/(1+r)n < 0.3

DISCOUNT RATE n (years)

8% >15

10% >1212% >10


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PIPELINE PLANNING


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DESIGN OF A PUMPING MAIN

A PUMPING MAIN DELIVERS WATER FROM

PUMPING STATION TO A SERVICE RESERVOIR

IT IS OPERATED AT A CONSTANT FLOW RATE AIM IS TO FIND THE DIA OF MAIN,CAPITAL

EXPENDITURE ON PUMPING PLANT AND

PIPELINE(INCLUDING POWER

CONSUMPTION,OPERATING COST).AND

KEEPING THAT TO MINIMUM


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USE OF DISCOUNTING

HIGH RATE OF DISCOUNT

DEVALUES FUTUTE EXPENDITURE

MORE THAN A LOW RATE OF

DISCOUNT

BECOMING LESS USED THESE

DAYS


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SOURCES AND PIPELINE

LAYOUTS

Service reservoir should be located as nearas technically feasible to the distributionarea it serves

If the service reservoir cannot be sitedclose to the distribution area , at least twomajor delivery lines connected at extremitiesto form a ring main thru the distribution area

A rise and fall main can be adopted wherethe only possible siting of service reservoiris further away from the distribution systemthen the source of water


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DISTRIBUTION SYSTEM

CHARACTERSTICS Minimum pressure at peak demand times

should not be less than 15-20 mts in themain at the highest supply point a systemcan serve

Static pressures at night time should be aslow as practicable

Consistent water quality must be maintained

thru the system Spare flow capacity must exist in the system

sufficient to meet foreseeable rises ofdemand over the next few years


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DESIGN OF PRINCIPAL

FEEDER MAINS

Matters to be considered

Optimum engineering route

Proposed mode of operating the

system

Location and capacity of storage

Capital Vs operating cost

Confidence in demand projections


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DESIGN OF NETWORKS Mains most frequently used for local distribution are

100 or 150 mm Dia

The dia of pipe mainly depends upon populationdensity of the area and how the pipe is supplied

At any time, t, of the day ,the demand

avg day avg day

domestic * Dt1 + non domestic * Dt2+ allowance

demand demand for leakageVelocity in the pipe should be within the range


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CONCLUSION PIPELINE PLANNING COMPRISES OF FINDING A

STRATEGY THAT BEST COVERS ALL REASONABLY

FEASIBLE DEMAND OPTIONS,MAINTAINGFLEXIBILITY IN CASE DEVELOPMENT DOES NOT

FOLLOW THE CURRENT PREDICTIONS

RING MAIN FORMATIONS AND AVOIDANCE OFANY

NEED TO DUPLICATE MAINS BACK TO THE

SOURCE LATER ARE USEFUL PRECAUTIONS


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THANK U

design and analysis of pipeline and distribution system

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