http://hdl.handle.net/20.500.12283/50 2026-04-03T21:33:13Z 2026-04-03T21:33:13Z Nakeya, Zahara Olupot, Peter Wafula, Simon Peter Kamulegeya, Obed Nakimuli, Naqiyyah Kimuli http://hdl.handle.net/20.500.12283/3759 2025-05-22T12:06:33Z 2023-01-01T00:00:00Z

Development of electronic waste management framework at college of engineering, design, art, and technology Nakeya, Zahara; Olupot, Peter; Wafula, Simon Peter; Kamulegeya, Obed; Nakimuli, Naqiyyah Kimuli The worldwide use of information and communications technology (ICT) equipment and other electronic equipment is growing. There is growing amount of equipment that becomes waste after its time in use. This growth is expected to accelerate since equipment lifetime decreases with time and growing consumption. As a result, e-waste is one of the fastest-growing waste streams globally. The United Nations University (UNU) calculates in its second Global E-waste Monitor 44.7 million metric tonnes (Mt) of e-waste were generated globally in 2016. The objective of the study was to develop a framework for improving e-waste management at the College of Engineering, Design, Art, and Technology (CEDAT). This was achieved by breaking it down into specific objectives, and these included the establishment of the policy and procedures being used in e-waste management at CEDAT, the determination of the effectiveness of the e-waste management practices at CEDAT, the establishment of the critical challenges constraining e-waste management at the College, development of a framework for e-waste management. The study population was 80 respondents, from which a sample of 69 respondents was selected using simple and purposive sampling techniques. This research was carried out to investigate the problem of e-waste and come up with a framework to improve e-waste management. The study reviewed the e-waste regulatory framework used at the college and then collected data, which was used to come up with a framework. The study also established that weak policy and regulatory framework, lack of proper infrastructure, improper disposal of e-waste and a general lack of awareness of the e-waste and the magnitude of the problem are the critical challenges of e-waste management. In order to appropriately address the issue, the policy and regulatory framework should be updated, localized, and strengthened. It will be helpful to launch awareness campaigns, issues. The study suggests a framework for e-waste improvement Keywords E-Waste, Treatment, Disposal, Computers, Model, Management Policy and Guidelines. Research article

2023-01-01T00:00:00Z Wafula, Simon Peter Kirabira, John Baptist Mukasa, Norbert Kamulegeya, Obed Nakimuli, Naqiyyah Kimuli http://hdl.handle.net/20.500.12283/3758 2025-05-22T12:06:33Z 2023-01-01T00:00:00Z

Design review of an Innovated Single Piston Diesel engine in Uganda Wafula, Simon Peter; Kirabira, John Baptist; Mukasa, Norbert; Kamulegeya, Obed; Nakimuli, Naqiyyah Kimuli Engineering designs are important in engine production. This research aimed at incorporating engineering principles and practices into the developed single piston diesel engine at Kevoton. Tests on the already innovated engine were carried out to evaluate the performance of the existing engines in terms of power, torque, rpm and exhaust temperature. Designs of the major components were generated together with material selection, which helped in determining whether the used material was appropriate for engine production. Results showed that the engine runs at a speed of 1800 rpm, a torque of 5 Nm, and a power of 10 HP with 2.4 liters per hour of fuel. The major components of the engine include the engine piston, the crankshaft, connecting rod, cylinder head and the camshaft. The power obtained after carrying out the new design was 13 HP, with a 5 Nm torque as well as 1 liter of fuel consumed per hour. It was realized that some components were not meeting the design specifications and the design was below the minimum required power of 13 HP. Power produced was less than 13 HP that was required to handle the purpose of engine manufacture, the engine was designed to be a prime mover to do most of the local. It was identified that the need of the engine should be considered as a primary requirement when coming up with the designs, the choice of injectors affect the amount of exhaust and engine testing requires consideration while designing an engine. Research Article

2023-01-01T00:00:00Z Wafula, Simon Peter Kamulegeya, Obed Buyondo, Andrew Kasumba Mutebi, Solomon Ogwang, Isaac Mutambo, Michael Kateu, James http://hdl.handle.net/20.500.12283/3541 2025-05-22T12:06:33Z 2023-01-01T00:00:00Z

Thermal comfort in a residential house in Kampala. Wafula, Simon Peter; Kamulegeya, Obed; Buyondo, Andrew Kasumba; Mutebi, Solomon; Ogwang, Isaac; Mutambo, Michael; Kateu, James; Global warming and climate change has been a challenge in the last decades. Buildings are major contributors to energy consumption. This is due to the rise in human comfort needs and services. The residential sector consumes a significant amount of energy worldwide. A NZEB strategy emphasizes closing the gap between energy demand and renewable energy supply. Despite some of the roles that NZEBs significantly contribute to smart cities on the energy efficiency, the potential contribution of NZEB to the residential sector of Uganda has not been documented in literature. The objective of this study was to develop a thermal comfort model in a residential house through an envelope design. CBE tool was used and results indicate; PMV with elevated air speed of residential houses during resting hours in Kampala; at night: -0.75. DBT as 24.1°C, PPD as 17%, the Cooling effect as 2.7°C and SET = 26.3°C. The study realized factors to be considered while building like; air temperature, average radiant temperature, air speed, air humidity. The model developed in this study enables a building to heat up during cold hours and cool down during hot hours by the help of the water pool collected during rainy days. This water cools down the house during the day time while absorbing heat that can be released during the night hours that are somehow cold in Kampala. However, if this isn’t considered, then heat pumps have to be employed to pump heat into rooms to reduce heating in rooms. Recommendations should be put in raising thick walls and ceilings to maintain building temperatures. Keywords: Net Zero, Energy, Buildings, Predicted Mean Vote Journal article

2023-01-01T00:00:00Z Otim, Daniel Smithers, Jeffrey C. Senzanje, Aidan van Antwerpen, Rianto http://hdl.handle.net/20.500.12283/2519 2025-05-22T12:06:33Z 2020-01-01T00:00:00Z

Investigation of system design criteria and the capital cost of varying design return periods for soil and water conservation structures highlights. Otim, Daniel; Smithers, Jeffrey C.; Senzanje, Aidan; van Antwerpen, Rianto Design of conservation structures includes both hydrologic and hydraulic designs. Hydrologic design involves the estimation of design floods which are required for the sizing of the hydraulic structures. The minimum recommended return period for the design of conservation structures is 10 years but due to the projected levels of risk, and the fact that a few large events are likely to be responsible for the majority of the erosion, the 10-year return period currently recommended may be inadequate. This study investigated system design criteria and the capital cost of varying design return periods for soil and water conservation structures in the sugar industry of South Africa. Observed rainfall data and results of runoff, peak discharge, and sediment yield simulated using the Agricultural Catchments Research Unit (ACRU) model were utilized in this study. Relationships between extreme events of sediment yield and the rainfall, runoff, and peak discharge events associated with them were analyzed and the capital cost of varying design return periods was also investigated. The results showed that only 0.2% of sediment yield events contributed up to 95% of the annual sediment yield simulated in the sugar production areas in South Africa and that any event of rainfall, runoff, and peak discharge had the potential to generate an extreme sediment yield event provided the soil surface was not adequately protected. Based on a sustainable soil loss of 5 t ha-1, the 20-year return period was recommended for the design of soil and water conservation structures. Furthermore, the capital cost implication of varying design return periods from the minimum 10-year return period ranged from an increase of 16% to 35% across the sugar industry. Therefore, given that soil erosion is associated with adverse effects on sustainable crop production and also increases in costs of replanting destroyed crops, the 20-year return period is recommended for the design of soil and water conservation structures in the sugar industry in South Africa. Keywords. Capital cost, Design criteria, Erosion, Return period, Risk, Soil, and water conservation. Journal article

2020-01-01T00:00:00Z