project proposal for kutadza alimon
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DEVELOPMENT OF A HIGH SPEED ELECTRIC
GENERATOR AS A RENEWABLE ENERGYTECHNOLOGY (RET) MODEL FOR
COMMERCIAL AND RURAL COMMUNITY
APPLICATIONS.BY
KUTADZA ALIMON
ELECTRICAL ENGINEERING LEVEL 4
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1:INTRODUCTION
1.1:BACKGROUNDAccording to the IEA-Energy outlook 2004 some
1.6 billion people about one quarter of the world'spopulation,have no access to electricity.80% of
these people live in rural areas of the developing
world.
Without adequate supplies of affordable energy,it
is virtually impossible to carry out productive
economic activity or improve health and
education.Zimbabwe is currently experiencing serious power
shortages and having excessive load shedding.
A wide range of factors are of course responsible
for the power shortages.
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BACKGROUND Cont'dIn as much as the entire nation is blaming the
national utility,Zimbabwe Electricity Supply
Authority,(ZESA),for the powershortages,emphasis needs to be shifted on howwe can find ways that more electricity can beproduced as well as utilizing that which is alreadybeing produced.
Zimbabwe has an installed capacity to produceabout 2100MW of electricity.
Electricity is generated locally at
Hwange(920MW),Kariba(750MW),Harare(135MW),Bulawayo(120MW) and Munyati (120MW )
As the supply falls far short of thedemand,electricity supply is sometimes
augmented by imports.
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BACKGROUND Cont'dAs the power supply falls far short of the
demand
However ,electrical machine design in the21st century has been made even more
possible because of the advent of fast,
efficient computer software and the ability tocarry out much iteration quickly and cheaply.
The impetus is now on the design Engineer
to arbitrarily design and perform calculationsrather than actually performing them. These
latest developments in design have enabled
the solving of many design problems.
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BACKGROUND Cont'dThe acute shortage of electricity in
Zimbabwe has heightened the need to
consider alternative generation modes.Some companies like Triangle Ltd
produce their own power while othershave resorted to using diesel and petrolgenerators to supplement the nationalgrid.
However this has proved to be very
costly for companies leading todiscussions on less costly and morerealistic approaches to electricitygeneration.
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1.2:PROBLEM STATEMENTThe desire to come out with alternative
generation modes involves utilizing some of
the nation's idle lying biomass points in theSouth eastern lowveld and in the Eastern
highlands.
For the points to be utilized correspondinglysmall scale electric power plants need to be
designed which leads to the
DEVELOPMENT OF HIGH SPEEDELECTRIC GENERATORS AS A
RENEWABLE ENERGY TECHNOLOGY
MODEL FOR COMMERCIAL AND RURAL
APPLICATIONS
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1.3:JUSTIFICATION
Previously electrical machine design and attempts to
disseminate RETS have encountered unforeseen
barriers,The 21st century has seen the advent of fastand efficient computer software and design
techniques which help in the realizations of these
ventures.
Barrier removal work like this project which aims at
design and construction are very important so that
future projects will avoid pitfalls experienced by
earlier initiatives. If successful this project promises to be a model for
the integration of large scale and
community/household scale sustainable biomass
energy management.
1 4 OBJECTIVES
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1.4:OBJECTIVES
Learn relevant design skills including
production of design drawings using relevantcomputer software.
Establish production methods for the RET
model with the help of a localcompany,organization and or institution using
locally available resources.
Perform calculations,develop detaileddrawings and design sheet for RET model.
And evaluate performance
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2:LITERATURE REVIEW
2.1IntroductionRETs have over the years become an
integral part of the energy supply chainin most developed countries. Recent
projections show that 13.5% of the
world's primary energy supply comesfrom renewable resources and that this
figure has an aggregated growth rate of
16%.Although the continent Zimbabwe has
abundant renewable resources,these
have not been fully utilized.
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Literature review cont'dSmall hydro projects producing power in
the output ranges of 1-10KW are gaining
popularity in Africa particularly as isolatedpower supply schemes for village
electrification.
However few biomass power plants existespecially in Zimbabwe where we have
Triangle Ltd as one of the biomass power
plant points.These companies have not extended their
electricity supply to neighboring
communities.
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2.2:DESIGN PROCESS
The design process is a series of steps that are
used as guidance in problem solvingThe design process is cyclical and is
fundamentally a process that is highly
computational and iterative.
The initiation of design of the high speed electricgenerator requires specification of performance
The main areas of design are the magnetic
circuit,the electric circuit and the heating andcooling circuit. A simple generalized design
process of electric generators has been
developed and outlined below
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3 METHODOLOGY
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3:METHODOLOGY
In carrying out this project variousmethods of gathering reliable datasuch as interviews, deskresearches and internet researcheswill be used.
Oral interviews will be carried outwith companies whose input inresources and information areessential to the success of the
project in Zimbabwe.The internet and literature from
the university library will also be
used. A design of the lab model
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METHODOLOGY-GAUNTT CHART
TASK DATES1 Introduction 10/10/2011-17/10/20112 Literature review 10/10/2011-31/10/20113 Design process 17/10/2011-30/11/20114 Design sheet 05/12/2011-12/12/20115 Construction of labmodel/Implementation
13/11/2011-28/03/2012
6 Testing of lab model 29/03/2012-05/04/20127 Discussions(limitations andrecommendations)
05/04/2012-12/04/2012
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4:EQUIPMENT AND MATERIALSThe initial stage in design procedure is the
selection of suitable basic materials to
use.Conducting materialCopper is the most suitable material to use
for electrical machines. Availability of
copper is fast becoming compromised asa result of dwindling deposits of copper aswell as its price fluctuations. Thereforecopper is fast being replaced by
aluminum.Magnetic materialSilicon steel is the most important for
construction of electrical machines.Insulating material
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Equipment and materials contd
For the synchronous generators the
desirable characteristics of the magneticcircuits are shown in the table below.
A variety of other construction materialsand equipment like windings, ball bearings,drilling machines, centre lathes and othermachining equipment are required. Most ofthe stator and rotor construction materials
would be supplied by Relmo.
PART MATERIAL NORMALLYUSED
Stator core Silicon steel
Stator tooth Silicon steel
Gap Air(in cooled machines)
Pole Silicon steel(for salient polemachines)
Rotor core Silicon steel
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BUDGET
SUBMITTED COST ENQUIRES AND
AM STILL TO RECIEVE A
RESPONSE.ALTHOUGH FOR THE
LAB MODEL STATOR AND ROTOR
CONSTRUCTION WILL BE PROVIDED
BY RELMO.
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