| Content | Abstract
This engineering project looks at the Design of an indirect evaporative cooling system for preserving perishable farm produce. An indirect evaporative cooling system for preserving the shell life of perishable farm produce was designed using locally available materials such as copper tubes, fiber glass, galvanized mild steel, stainless steel and foam (pad). The system is divided into four parts viz Heat exchanger, cooling chamber, body frame, and electrical part. The cooling chamber was constructed with galvanized metal steel, stainless steel, and polystyrene foam which were used for lagging. Upon completion of the system, it was tested for 10days using fresh tomatoes to evaluate its performance and efficiency. From the test, an efficiency of about 70.37% was obtained for the designed system. It was shown that the average cabinet temperature (21.6oC) drops when compared to the average ambient temperature (31oC) while the relative humidity of the cabinet increases from 40% (ambient condition) to 75%. Hence, the conditions in the chamber, therefore, can be considered very conducive for storing fruits and vegetables because the storage temperature and the relative humidity were kept within the optimum level thus keeping the fruits and vegetables fresh. Experiments need to be performed to identify more locally available materials that can successfully be used as absorbents. | Abstract
This engineering project looks at Modern washing machine, principles of operation and maintenance. The goal was to design, build and test a prototype modern washing machine that incorporates its principle and maintenance as a mechanical safety feature. The main problem was to develop an ergonomic and low cost solution while ensuring the safety and reliability of the system through-out it full range of motion. The purpose of this study is to gain information related to its development, to aid the removal of dirt’s and stains and in carrying out repairs and maintenance on modern washing machines. A modern washing machine structure includes, peddles or fingers to automatically agitate the clothing. Inside the cloth washer drum, the paddles turn the clothes through the water, the hole let the water in (from above) and out (from below). The rubber seal stops the water leaking out through the door.. | Abstract
This engineering project focuses on the Design and fabrication of groundnut shelling machine. Groundnut shelling machine was designed and fabricated at the Department of Mechanical Engineering, Institute of Technology, Kwara State Polytechnic Ilorin aimed at increasing shelling/decorticating efficiency and eliminating drudgery associated with the traditional method of -shelling groundnut and other developed methods such as pedal-operated methods. The machine is powered by a 1.5 horsepower motor at a speed of 1440 revolution per minute. Performance investigation carried out show a good performance of the machine with decorticating efficiency, undecorticating efficiency, machine damage efficiency, cleaning efficiency and output capacity of 92%, 7.5°k, 3%, 85% and 120kg/hour respectively. It is recommended that a motorized oscillating decorticator for commercial production for human and even animal consumption be fabricated using stainless steel material for critical parts. | Abstract
This engineering project focuses on A project report on the design and construction of adjustable drawing table and stool. Engineering drawing as a language of engineers, technicians and technologist involves the use of drawing sets like erasers, set squares protractors, tee-square, divider, French curves etc. in other to produce an accurate drawing quickly and conveniently, there is need for drawing tables and stools. Tables are constructed so that it remains flat throughout its surface and has a straight edge each ends. This project is mainly concerned about the designs and construction of a simple drawing table and a stool suitable for use in citadel of higher learning. This construction is made from assemble of metallic frame or structure and a flat rectangular wooden top. This project report only talked about the design and construction of a simple drawing table and stool. However, new developments in the designs of drawing table including the adjustment of the top board to an inclination angle that suits the users comfort and a stool for proper sitting for accurate drawing to be enhanced. Other included fittings are of a parallel motion mechanism which keeps the tee-square, attached to the board and parallel to the top boards. We may also have those with flat aluminum tops. The top boards of modern drawing tables vary in accordance to the size of paper they are used with. The one discussed in this report was designed to accommodate a full sized cardboard. | Abstract
This engineering project focuses on the design and fabrication of deep freezer for the preservation of items/products and making the items to cool. The project is able to develop a simple efficient economical and environmentally friendly refrigeration system (A freezer) towards better technological advancement in Nigeria. This project modifies the existing refrigeration system with the use of R-600a which is ozone friendly and non-contaminant like the previous refrigerant of the hydrofluoric-carbon, HFC and CFC like R-12, and R22 which has been phased out according to the general convection at Britain in 1996. The cooling load obtained was 10682KW, and co-efficient of performance be minimized. The material used was mild steel and the inner pipe of the cabinet i.e. evaporator in order to minimize corrosion. For the better improvement of this work, low power consumption of the compressor refrigeration was used so as to maintain the rate of cooling and freezing of large items/products. And the outer dimensions are: length-1245mm, breadth-895mm-0. 895m, Height-906mm-0.96m and the inner dimensions are Iength-1225mm-1.225m Breadth-895mm-0.895m, Height-886mm- 0.886m.. | Abstract
This engineering project looks at Design, construction and testing of beans threshing machine. The main objective of this project is to design construct and test of beans threshing machine at Bayero University Kano, Nigeria, to determine its performance and ease the drudgery problems associated with threshing of beans by a small scale farmers as well as large farmers. Evaluation was carried out with IT08K-150-27 soybeans variety at different level of moisture contents, 14.5%, 10.5% and 14% and at different drum speed 360 r/min, 466 r/min and 633 r/min with mass inputs of 1.5kg, 2.35kg and 2.0kg. the overall mean results obtained for performance indicators in terms of threshing efficiency are 95.3%, 97.0% and 92.46%,percntage of grain damage2.53%, 2.11% and 3.10% are and grain recovery are 98.1%, 98.37% and 98.09%. The evaluation results indicated the highest output of threshing efficiency of 97.0% at threshing speed 466rpm with an output of 120k/hr was achieve. The beans threshing machine is simple to operate and maintain simple without formal education. The unit cost of this threshing machine was 96,000(ninety six thousand naira only). |
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