Browsing by Author "Ejiga Anthony Ejiga"

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    Assessment of Electrical Energy Consumption in Some Selected Tertiary Institutions Administrative Buildings in Niger State
    (School of Environmental Technology, Federal University of Technology Minna. PMB 65, Minna, Niger State Nigeria., 2024-11-29) Musa Titus Dada; Akanmu Williams Paul; Jimoh Richard A; Ejiga Anthony Ejiga
    High electrical energy consumption in public buildings and institutions poses a significant challenge, particularly in developing countries like Nigeria. Inadequate empirical studies on building energy use have resulted in a lack of electrical energy data, especially in tertiary institutions where bulk metering is common. This study aimed to assess the electrical energy consumption in selected administrative buildings of tertiary institutions in Niger State, with the goal of reducing electrical consumption and improving energy efficiency. Experimental data collection involved direct field measurements using a real-time Efergy wireless energy (EW4500) monitoring device. Current transformer sensors were attached to the main distribution panels of the administrative buildings at the Federal University of Technology Minna, Niger State Polytechnic Zungeru, and Niger State College of Education Minna. The objectives included evaluating electrical energy consumption, comparing total consumption across buildings, and analyzing energy consumption patterns. Results indicated that the Senate building at FUT Minna had the highest consumption rate at 2604.7 KWh/m², followed by Niger State Polytechnic Zungeru at 2579.1 KWh/m², both exceeding the global benchmarks of 128 to 130 kWh/m² set by the Chartered Institute of Building Services Engineers (CIBSE) and the Building Energy Efficiency Guideline for Nigeria (BEEGN). In contrast, COE Minna’s administrative building, with consumption levels averaging 1579.1 KWh/m², generally fell within these benchmarks. The elevated energy consumption at FUT Minna and Niger State Polytechnic Zungeru was primarily attributed to operational inefficiencies, such as the continuous operation of HVAC systems and equipment during non-essential hours, even when buildings were not fully occupied. Hourly consumption patterns revealed peak usage during early working hours, with significant seasonal variations; however, both FUT Minna and Niger State Polytechnic Zungeru exhibited high energy use during off-peak periods, reflecting poor energy management practices. To address these inefficiencies, the study recommends conducting comprehensive energy audits and installing energy-efficient appliances at FUT Minna and Niger State Polytechnic Zungeru. Additionally, implementing smart metering, occupancy sensors, and optimized HVAC controls would significantly enhance monitoring and reduce energy consumption. These measures are critical for improving energy efficiency and ensuring sustainable operations in both institutions.
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    Thermal Comfort Performance of Thermoelectric Peltier Module Refrigeration System in Built Environment
    (School of Environmental Technology, Federal University of Technology Minna. PMB 65, Minna, Niger State Nigeria., 2024-11-29) Musa Titus Dada; Ejiga Anthony Ejiga
    According to data provided by the International Energy Agency, nearly 1.6 billion air conditioning (A/C) systems were operating globally in 2017, accounting for approximately 6% of the overall final energy consumption. To address the energy and economic challenges posed by such extensive use of air conditioning for thermal comfort, it is imperative to identify alternative solutions that can effectively operate in warm-humid environments. This study explored the thermal comfort performance of thermoelectric module refrigeration (TEMR) system in built environment; installed in a single-room facility in Minna, Niger State, Nigeria, over a one-month period. The experimental setup involved a test room measuring 1.3 m x 2.6 m x 3 m, equipped with aluminum roofing, an asbestos ceiling, an aluminum-framed window, and a steel door. The TEMR system was assessed for its ability to regulate indoor temperature and humidity under varying external climatic conditions. The TEMR system operated at a constant current of 6.4A, with data collected at specific intervals throughout each day. Results indicated that the TEMR system significantly reduced indoor air temperature and relative humidity, particularly during peak operational hours (12:00 pm to 2:00 pm). Weekly variations showed temperature drops from 37°C to 22°C and humidity reductions from 60% to 32% within 60 minutes of operation. These findings align with ASHRAE Standard 55-2017 for indoor environmental quality. The study concludes that the TEMR system is effective in improving indoor climatic conditions, offering a sustainable and energy-efficient cooling solution. Its performance, influenced by external climatic factors, demonstrates potential for broader application, particularly in developing regions where long- term, low-maintenance, and environmentally friendly cooling solutions are needed.