Adino Eba, Abewaa Mikiyas, Tiruneh Amare
Department of Environmental Engineering, Addis Ababa Science and Technology University, 16417, Addis Ababa, Ethiopia.
Department of Chemical Engineering, School of Mechanical, Chemical and Materials Engineering, Adama Science and Technology University, Adama, Ethiopia.
Heliyon. 2024 Mar 16;10(6):e28300. doi: 10.1016/j.heliyon.2024.e28300. eCollection 2024 Mar 30.
Industrial development in Ethiopia is rapidly increasing, leading to a growing gap between energy supply and demand. To address this, efficient energy utilization in existing industries is crucial. Energy audits identify energy losses and recommend saving measures. Therefore, this study evaluates energy efficiency through an audit and estimates greenhouse gas emissions for a Meta Abo brewery. The indirect method of energy audit and the greenhouse gas protocol of carbon footprint estimation were used to evaluate the energy efficiency and carbon emissions of Meta Abo brewery. The boiler efficiency for Bono Energia and Cochran boilers was found to be 79.2% and 80.9%, respectively. Poor insulation caused an estimated annual fuel loss of 35,350 l (638,768 Ethiopian birr) for steam pipes, while steam leakage resulted in a loss of 31,614 l (571,265 Ethiopian birr). The factory's high electricity expense was attributed to a diesel generator consuming 6000 l/d. Greenhouse gas emissions raised from 9156 to 22,697 tons of CO equivalent between 2014 and 2018. Implementing the proposed energy-saving measures could save 20.4 TJ of thermal and electrical energy annually, costing approximately 8.5 million Ethiopian birr, and reduce boiler emissions by 455 tons of CO equivalent. Therefore, implementation of these measures is recommended.
埃塞俄比亚的工业发展迅速增长，导致能源供需差距不断扩大。为解决这一问题，提高现有工业的能源利用效率至关重要。能源审计可识别能源损失并推荐节能措施。因此，本研究通过审计评估了一家梅塔阿博啤酒厂的能源效率，并估算了温室气体排放量。采用能源审计的间接方法和碳足迹估算的温室气体协议来评估梅塔阿博啤酒厂的能源效率和碳排放。发现博诺能源锅炉和 Cochr an 锅炉的效率分别为 79.2%和 80.9%。保温不良导致蒸汽管道每年估计燃油损失 35350 升（638768 埃塞俄比亚比尔），而蒸汽泄漏导致损失 31614 升（571265 埃塞俄比亚比尔）。工厂高昂的电费归因于一台柴油发电机每天消耗 6000 升。2014 年至 2018 年期间，温室气体排放量从 9156 吨二氧化碳当量增加到 22697 吨。实施建议的节能措施每年可节省 20.4 太焦耳的热能和电能，成本约为 850 万埃塞俄比亚比尔，并减少锅炉排放量 455 吨二氧化碳当量。因此，建议实施这些措施。
