Science Engineering Entrepreneurship Design (SEED) Journal

Infrared Sensor-Based Object Counting System with LED Display

Gabriel Domoninge Naa — 2024-11-17

This paper presents a novel approach to object counting using an infrared (IR) sensor network. The system employs IR sensors to detect the presence of objects, accurately counting them in real-time. The counted values are then visually displayed through Light Emitting Diodes (LEDs), providing a simple and effective means of conveying the object count information. This low-cost and efficient solution finds applications in diverse fields, such as inventory management, occupancy monitoring, and traffic analysis, contributing to the advancement of smart sensing technologies.

Design and Implementation of a Three-Phase Automatic Changeover Switch Using CAD Electrical Simulation

Enoch Aho — 2024-11-17

The advantages of using an automatic changeover switch, which involves switching power from one source to another, is enormous. An automatic change-over switch system ensures a continuous power supply to load in case the mains supply is faulty. Manual power switching from one source to another takes time and may delay some processes, rendering it disadvantageous. In this project, we designed and implemented a three-phase automatic changeover switch system for Ashesi University to ensure an uninterrupted power supply to the institution's electrical infrastructure. The ECG is the system's primary power source, with a generator set as an alternate power supply in the event of ECG power failure. When the ECG power source fails, the system automatically switches to the generator set within a specified time limit and then returns to the ECG power supply when it becomes available. The system was designed using a combination of contactors, relays, timers, starters, and switches. This project has a substantial impact since it assures that Ashesi University's electrical infrastructure has an uninterrupted power supply, eliminating the risk of data loss, service disruption, and life endangerment.

Miscrostructural Analysis Of Ores Using USB and Metallurgical Microscopes

Keziah Enyonam Noamesi — 2024-11-17

In this paper, Metallurgical and USB microscopes are used to analyze the microstructure of different materials. Examining the interior structures of samples—with an emphasis on grain boundaries and sizes—and talking about how these microstructures affect material properties are its main objectives. Important results show that material qualities like strength, toughness, ductility, hardness, and diffusion rates are strongly influenced by microstructure. The study emphasizes how using a variety of imaging techniques is essential to gaining a thorough grasp of material properties because each technique displays distinct microstructure features. Finally, the findings highlight the significance of microstructural analysis in the fields of materials theory and engineering.

Terminal Characteristics Studies of a MATLAB Simulink-Based Model of Shunt DC Motor

Jonathan. Baraka — 2024-11-17

This paper comprehensively investigates Shunt DC motors, using MATLAB/Simulink for modeling and simulation. The emphasis lies in understanding the magnetization curves, terminal characteristics, and speed control methods inherent to these motors. The simulation results encompass the analysis of the magnetization curve, terminal characteristics, and the consequential effects of speed control methods on motor performance. The outcomes affirm the reliability and versatility of shunt DC motors, providing valuable insights for the broader understanding of electromechanical systems.

Green Hydrogen Production - A Potential Sustainable Solution to Zimbabwe's Cooking Fuel Shortage

Charlton Mandaza — 2024-11-17

Access to clean cooking energy remains a significant challenge, particularly in sub-Saharan Africa, where reliance on traditional biomass fuels contributes to deforestation, health risks, and environmental degradation. This paper investigates the feasibility and advantages of adopting hydrogen-powered cookstoves as a sustainable solution for Zimbabwe. Hydrogen, known for its zero-emission combustion and potential for renewable production, presents a promising alternative to conventional cooking fuels. Utilizing abundant solar resources, solar-powered electrolysis emerges as a viable method for producing green hydrogen. The paper evaluates current cooking technologies, highlighting hydrogen's efficiency and environmental benefits compared to solid fuels, kerosene, and electricity. It emphasizes the necessity for further research and experimentation to establish sustainable hydrogen production. This includes exploring the potential of decentralized hydrogen production through standalone cookstoves capable of on-demand hydrogen generation or centralized production, possibly in the Namib Desert.

Design of a Rectifier and DC-DC Buck Converter

Mohammed Elmir — 2024-11-17

As the world's energy demands continually increase, the role of power electronics in reducing the variabilities and constraints on the power grid has become increasingly important. Key power electronics components, such as the power converter, are interfaced between a power source and load to control power parameters. Power converters, mainly rectifiers and DC- DC buck converters play important roles in transforming electrical energy from one form to another while minimizing losses. Rectifiers are key in converting alternating current into more stable direct current, as needed in systems that require constant DC power. On the other hand, DC-DC converters are instrumental in voltage regulation as they can step down (buck converters), step up (boost converters), or perform both operations (buck-boost converters). This paper details a comprehensive analysis of the design of a full-wave power rectifier and a buck converter and their performance. The core investigation involves theoretical calculations, simulation-based assessments, and the use of key components to meet predetermined specifications.