Undergraduate Completed Research

Top three projects for the year 2011

1. TITLE: Glass Reinforced Plastic Tanks as an Alternative to Galvanized Hot Water Tanks

OWNERS: Nzove S. Nduku and Kilimo Chemeito Moses

ABSTRACT

Over the years, solar heater storage tanks have been made of galvanized steel. The design and fabrication of the solar heater storage tanks from galvanized steel has shown to be totally within the present state-of-art but long term durability of the tank is questionable.

The corrosion of domestic hot water tanks involves destruction by electrochemical action of galvanized steel in presence of water.

Although the galvanized layer prevents corrosion of the underlying steel layer, the tanks are still corroded. Depending on the sunshine intensity, the temperatures of the water in the tank fluctuate and can go as high as 600C. Since corrosion is directly proportional to temperature, therefore, at this elevated temperature, the tank corrodes.

This project was undertaken to evaluate the technical and economic feasibility of design and fabrication of a solar heater water storage tank using Glass Reinforced Plastic (GRP) as an alternative structural components.

2. TITLE: Design and Fabrication of A Simple Vacuum Preservation System for Domestic Application

OWNERS: Meshack Hawi and Bernard Otieno Owiti

 

ABSTRACT

Kenya is an agricultural country. Most of the produce gets spoiled quickly due to lack of proper food/produce preservation facility that can easily and conveniently be accessed by the farmers, traders or consumers. The existing methods of food preservation are either expensive or have certain limitations. These limitations and cost limit the use of these preservation methods.

The methods of food preservation that has been used and still in use range from traditional e.g. smoking, drying, salting and heating to modern methods like pasteurization and refrigeration. Refrigeration which is the most commonly used has certain weaknesses such as prohibitive cost of the equipment and continuous reliance on power for operation. It also causes freezer burn in some food types.

The project involved the design and fabrication of a vacuum preservation machine to address the limitations of the existing and commonly used food preservation methods. The vacuum preservation machine is designed to extract air from a bag or a container in which the product to

be preserved is placed and then sealed to make it air-tight so that an oxygen free environment is created around the product. A vacuum pump is used to extract air from the confined space and then an electric heat sealer used to seal the bags carrying the product.

The machine can be used in the preservation of agricultural products such as cereals and vegetables. Other areas of application include preservation of perishable products such as fish, meat and biological specimens. The vacuum preservation machine can also be used to protect electronic components that are sensitive to oxygen i.e. that corrode in presence of oxygen and moisture.

3. TITLE: Conversion of Electrostatic Precipitator Filter to a Combined Jet Pulse and Electrostatic Precipitator Filter

OWNERS: Auka V. Maureen and Kariuki Samuel Ndegwa

ABSTRACT

Particulate matter is the primary pollutant emitted from the manufacture of Portland cement. Because of the raw materials used, almost every operation in the cement plant has the potential to produce dust. Exhaust from the kilns is the largest source of particulate emission in cement plant. The second and third largest sources are the clinker cooler and the raw mills respectively.

Electrostatic precipitators (ESPs) have been used to reduce particulate emissions from cement kilns, coolers and mills in cement plants. In recent years, several developments have been made as well as significant progress in filtration media such as bag collector, which is a viable alternative to ESPs.

In order to achieve the optimum solution for dust filtration efficiency, Bamburi Portland Cement Company does not have to remove the existing ESPs. However, it is proposed that the invented hybrid technique to be used hand in hand with the existing one. That will enable them to evaluate the performance of both techniques. The new combined filters are fitted with ESP and tetrex filter bag technology and are capable of removing 10t/day of dust from the raw mills. This ensures that the product from the overflow of the raw mills circuit cyclone is removed and that dust emissions from the filter systems are kept well below 30mg/m3 level. Additionally, the filter and the ductwork are covered to avoid condensation.

This system of filtration can in future be installed on site to have a complete walkway, access platforms, fans, and ductwork and dust removal screw conveying systems.

The main advantages of this project are:

* There is greater reduction in overall electric cost necessary to run the filter.

* Increased efficiency of dust filtration.

* The filter system provides high dust holding capacity in conjunction with a slow rise in pressure drop –thus long life times.

* There is minimal risk of explosions i.e. carbon monoxide can be present in the exhaust gases without a risk of explosions unlike in the case of ESPs alone.

* Pulse-jet baghouse have the capability of online maintenance.

* Stricter emission regulations (by the government and Portland cement Company) through all operating conditions which leads to lower emissions.

* Advancement in filter media increases a bag life which ensures lower operating cost.

The project was based on the theme Vision 2030 and National Industrialization Policy Chapter 2:16 For Cleaner Production and Environmental conservation.

This project involved development of a Resource Efficient and Cleaner Production (RECP) programs. With the 1st policy statement on cleaner production and environmental conservation being to promote investment in local manufacturing of resource efficient and cleaner production equipment along with other emerging technologies.

BSC. MECHANICAL ENGINEERING YEAR 5 2011/2012

NAME

PROJECT TITLE

SUPERVISOR

KIPROTICH C. Benard Design, Fabrication and Performance Testing of a Vibratory Screen Separator Mr. H. O. Juma
KIPKEMEI O. Maswai
CHIWAI K. Elijah Design, Fabrication and Testing of a Pedal Powered Water Pump Mr. G. Kyove
NGOME M. Adam
MAKANYENGO Julius O. Design and Fabrication of a Juice Extraction Machine Prof. S. M. Maranga
NGERU T. Ngigi
KEMBOI G. Kiprotich Design and Fabrication of a Manual Powered Chipper Mr. R. M. Mutevu
OKWARO C. Wangala
GACHERU C. Kariuki Design and Fabrication of a Pedal Operated Drilling Machine Mr. R. M. Mutevu
LUSIGE Alex Nanyeso
MUSAMALI B. Wafula Redesign and Fabrication of a Moped Mr. J. K. Kimotho & Mr. J. Mutua
NAWERA E. Wegulo
NDERITU Kelvin Gitonga Redesign and Fabrication of a Biomass Powered Food Drier Mr. H. O. Juma
KOO D. Nyanganka
MURANO N. Elisha Design and Fabrication of a Wind Powered Lagoon Aerator Mr. J. K. Kimotho
NDERITU P. Mathenge
NG’ETHE John Establishment of Capacity and Performance Characteristics of the Fruit Juice Extracting Machine Mr. R. M. Mutevu
ONYANGO J. Atieno
NGUGI Philip Kuria Design and Manufacture of Charcoal Bricket Making Machine Mr. H. O. Juma
KYULE Festus Nguvi
MARY Edwin Maina Design and Fabrication of a Fruit Grading / Sorting Machine Mr. R. M. Mutevu
NJOROGE J. Thandi
KIARIE Samuel Kamau Design and Fabrication of a Simple Soap Extrusion Machine Mr. H. O. Juma
MWANGI Julius Kinuthia
NZOVE S. Nduku Glass Reinforced Plastic Tanks as an Alternative to Galvanized Hot Water Tanks Mr. K. Kiragu
KILIMO Chemeitoi Moses
OBIKO Japeth Oirere Design and Manufacture of a Stove for Making Coke and Other Products from Coal – Operations and Testing Prof. S. M. Maranga
KIURA M. Kennedy
KAHIGA W. Miriam Packaging of Biogas Dr. B. W. Ikua
MACHARIA N. Wanjeri
BOIT K. Samuel Design and Fabrication of a Cross Flow Turbine for Mini Hydro Schemes Prof. S. M. Maranga
KIBET Denis
KIPLAGAT Eric Kimayo Design and Construction of a Hydraulic Ram Pump Using Foundry Technology Prof. S. M. Maranga
MAINA Kago Paul
OCHIENG M. Hawi Design and Fabrication of a Simple Vacuum Packer for Domestic Application Mr. H. Ndiritu
OWITI O. Bernard
KINUTHIA John Design and Fabrication of an Injection Molding Machine for Plastic Recycling Mr. K. Kiragu
MACHARIA Dennis Murigi
APUTSA J. Ken Design of a Safety and Productivity Enhancement System for Cadbury Kenya Limited Dr. S. M. Wanjii
NTONGAl P. Muchui
MRAMBA Joseph Sampuli Design and Fabrication of an Ice Cube Making Machine Dr. S. M. Wanjii
TUNGA Tunje Davis
ONSONGO Michael Mosiere Compressorless Solar Powered Refrigerator Dr. B. B. Gathitu
IDI Moses Odhiambo
MAKAU M.Fredrick Optimization of Exhaust Gas Heat: Case Study of Iberafrica Nairobi South Power Plant Dr. B. B. Gathitu
MUMENE Humphrey
AUKA V. Maureen Conversion of Electrostatic Precipitator (ESP) to a Combined Jet Pulse and ESP Filter Mr. H. Ndiritu
KARIUKI Samuel C. Ndegwa
GAKUO Anthony Ndung’u Design and Fabrication of a Small Scale Steam Boiler for the Waste Oil Burner Mr. H. Ndiritu
MACHARIA Franco M.
NYAMBANE Onesmus Okemwa Design and Fabrication of an Interlocking Block Press with Hydraulic Components Mr. R. M. Mutevu
MUNALA Alphayo

BSC. MECHANICAL ENGINEERING YEAR 5 2010/2011

NAME

PROJECT TITLE

SUPERVISOR

MUEMA F. MADARAKA Design and Fabrication of a Biomass Powered Cereal Drier: Focus on Maize Mr. H. J. Onyango
MUSAU S. KIMAYU
MWANGI AUSTIN GACHIENGO Renewable Energy: A Wind Turbine Generator Model Dr. B. B. Gathitu
ELIUD KOOME
AONGO W. OTIENO Redesign and Manufacture of Pico Hydro Turbine Prof. S. M. Maranga
KIRUI K. EDWARD
EVANS CHARLES Design, Fabrication and Assembly of a Single Axis Solar Tracking System Mr. O. M. Muvengei
WANYONYI M. JOSEPH
KINUTHIA SOLOMON MUNGAI Improving of Locally Mined Bentonite for use as a Drilling Mud for Well Drilling Mr. P. M. Weramwanja
NGUGI JOHN MBURU
MURIITHI M. WAWERU Design and Fabrication of a Solar Powered Waste Oil Burner Dr. B. B. Gathitu
IRUNGU N. FREDRICK
KIHARA K. JORAM Design and Fabrication of a Spade Making Press Machine Mr. R. M. Mutevu & Mr. G. Kyove
NG’ANG’A EUTYCUS KIONGO
MBUGUA E. KARANJA Design of an Automatic Bottle Capping Machine Mr. J. K. Kimotho
OGUNDA O. ALLAN
KIBIWOTT K. DAYNICIOUS Determination of the Performance Characteristic of the JKUAT Plant Mill Eng. B. K. Kariuki & Eng. Nduati
KIPTOO C. PHILIP
KIPRONO BETT HOWARD Design and Fabrication of a Molding Machine Prof. S. M. Maranga
THUO JOSEPH MBURU
NYAMBANE NAHASHON Design and Fabrication of a Coconut Shell Crusher to produce Chips for manufacture of Particle Boards Mr. C. A. Adenya
NYARIKI O. WYCLIFFE
ANDOLO GRACE VIHENDA Lubrication Optimization: A Case Study of Bamburi Cement Limited Dr. B. B. Gathitu & Eng. S. Wachira
KAARIA F.  MWENDWA Design and Fabrication of Cross Flow Turbine: For Mini-Hydro Schemes Prof. S. M. Maranga
MOYWAYWA A. BEN Redesign, Fabrication and Testing of a Soya Milk Processing Machine Mr. J. K. Kimotho
OLOO C. OCHIENG
MAVU L. MWAINGO Design of an Interlocking-Block Press Mr. R. M. Mutevu & Mr. G. Kyove
ORINDA A. TOLBERT
BAKARI A. HASSAN Design and Fabrication of an Involuntary Flush Toilet Model Mr. J. K. Kimotho
MWANYIRO  J. KASSIM
MWEBIA G. MWIRIGI Re-Design and Fabrication of a High Speed Manually Operated Drilling Machine Mr. R. M. Mutevu
RUCHAGO J. KAIRUTHI

BSC. MECHANICAL ENGINEERING YEAR 5 2009/2010

NAME

PROJECT TITLE

SUPERVISOR

KASAON Stephanie Jepng’etich Uses of Geothermal Waste Heat

Mr. E. Kipyego

WANDIBBA John Macharia
OKETCH Obara Peter Design and Manufacture of Pico-Hydro Turbines.

Prof. Maranga

MWANGI Gideon Gichuhi
MURAYA Beth Wanjiru Wind Energy as an Alternative Energy Source and its Application

Dr. K. Kibicho

NYANGWARIA M. Cheruto
OTIENO  Bernard Okoth Design and Fabrication of a Biofuel Steam  Engine

Dr. K. Kibicho

NDIVA Joseph Mungai
MBUTHIA Boniface Gakumo Testing the Diesel Engines for Compatibility with Biofuels and Soot Density.

Dr. S.Wanjii

MAINA George Kinyua
DIO  Mdzomba Dzombo Design and Fabrication of a Biogas Lamp.

Dr. S.Wanjii

BARAWA Maurice Mwanjenje
MWANGI  Isaac Nderitu Design and fabrication of an axial flow irrigation pump.

Mr. G. Kyove

KANGOGO Timothy Kiptanui
NDUNE Khalfan Mbaya Design and Fabrication of Hydraulic ram pump for use in improved pumped storage hydro-power station.

Mr. M. Muvengei

BOSIRE Duke Kimaiga
WACHIRA Charles Kirungui Design and Fabrication of a Soya Milk Processing Machine.

Mr. K. Kimotho

MUNYALO Muthoka Jotham
KARIUKI Dickson Mburu Automatic Gate Operable by Mobile Phone.

Dr. K. Kibicho

OKATCH Obuya Henry
ASARIA Ongesa Onsoti Design and Fabrication of an Economical Stone Crusher.

Dr. K. Kibicho

OBWOGI O Enock
KIBII  K Daniel Improvement of Wire Drawing Machine

Prof. Maranga

OUMA Eddy
OTIENO Ignatius Ochanjo An investigation of Tool Geometry on Cutting Forces when Using Negative Tool Rake

Mr. H. Juma

Sang K. Duncan
BETT Kiprono Alvins Quality Control in Casting Operation of Recycled Aluminium Alloy

Prof. Maranga

KILAKA Wilfred Mutuku
OTIENO Amos Onyango Casting of Identified Components for Food Machinery: Tomato Processing

Prof. Maranga

GICHUHI Lenny Njenga
KHIBALI Linda A Stove for Processing Identified Raw Coal to Produce Coke and Coal Dust (II).

Prof. Maranga

ALUNDA O Bernard

BSC. MECHANICAL ENGINEERING YEAR 5 2008/2009

NAME PROJECT TITLE
Mathew Ndeto Mini hydro power plant
Christopher Odhiambo Onyango Fluidized bed combustion of biomass fuel
Willy Kirgat Processing of raw coal to get coke and other useful products
Andimu Christopher Otanga Design of juice extractor
Alfred Biketi Simiyu Combustion properties of biodiesel
Derek Mutungi Algae as a source biofuel
Gatheru Sammy Nyiri Traditional metal working
Amisi Jared Development of a gas cooker burner
Okong’o Collins Velocity profile in the wake of an aerofoil
Mutua James Energy audit for East African Breweries Ltd, Nairobi
Bernard Kosgey Effects of additives on the fatigue and impact properties of recycled aluminium alloy
Munyao Musango Design and fabrication of a briquette making machine
Sarah W. Ngure Design of Biogas Plant for Large scale application
Ngetich Bernard Magnetic fuel saver
Otieno Odhiambo Plastic Molding machine
Charles Okoth Improvement of wire drawing machine and analysis of wire drawing process
Luka Mbugua Mbau Crushing of the kernel of oil seeds
Samuel Ngugi Design and fabrication of  a peanut roasting machine
Kenneth Kariuki Mini hydro power plant
Arnel K. Ndiwa Fluidized bed combustion of biomass fuel
Munyerere I. Fedha Processing of raw coal to get coke and other useful products
Cyrus Gitonga Design of juice extractor
Hezekiah Odhiambo Ayieke Combustion properties of biodiesel
Paul W. Imbo Algae as a source biofuel
Sikuku Misiko Traditional metal working
Binyenya Authur Development of a gas cooker burner
Okong’o Collins Velocity profile in the wake of an aerofoil
Shikuku Simon Energy audit for East African Breweries Ltd, Nairobi
Abraham Khaemba Effects of additives on the fatigue and impact properties of recycled aluminium alloy
Mise Evans Design and fabrication of a briquette making machine
Kevin Mbundu Design of Biogas Plant for Large scale application
Odhiambo J. Hezekiah Magnetic fuel saver
Jennifer Asigwa Plastic Molding machine
Onesmus Kipngetich Improvement of wire drawing machine and analysis of wire drawing process
Calvince Otieno Crushing of the kernel of oil seeds
Michael Wanja Design and fabrication of  a peanut roasting machine