Browsing by Author "Eshetu, Wondimu"

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    Improvement of Energy Efficiency of Addis Ababa Bottle & Glass Share Company
    (Addis Ababa University, 2010-09-20) Eshetu, Wondimu; Tesfaye, Dama (PhD)
    Addis Ababa Bottle & Glass Share Company purchases furnace oil and electricity from National Oil Company (NOC) and Ethiopia Electric Power Corporation respectively to satisfy its primary energy demand. The prices of a liter of furnace oil and a kWh of electricity are 9.49Birr and 0.5778 Birr respectively. The objective of the thesis is to suggest cost effective measures to improve the efficiency of energy use. The scope is to identify energy conservation opportunities to reduce energy costs and prepare an energy & documentation to implement cost effective energy utilization changes. The methods employed to achieve the objectives of the research are: Literature review, Preliminary data collection of the company, Inspection of company energy consuming systems and equipment, Perform desktop analysis, Identify feasible Energy Conservation Opportunities (ECOs), Perform technical feasibility of the identified (ECOs), Perform economic analysis of the identified (ECOs), Prepare list of recommended energy conservation measures (ECOs) & Prepare action plan. To evaluate the performance analysis of these major energy consuming systems, different data were collected by using portable instruments, the instruments installed on major energy systems, nameplate and referring to company log sheet and record book. The instruments are: Portable Combustion Analyzer (PCA) analyze combustion air, Infrared and dual K contact thermometer measure the surface temperature, Tape meter measure the length of the object & Vernier's calliper measure the internal pipe diameter. Using these data pre-energy audit analyses on heating value of furnace oil, combustion property of the furnace and some of the results obtained including NCV of furnace oil is 39262.6kJ/kg & the excess air in the furnace is 136% . To conclude that using standard methods the energy balance was conducted to determine the first law efficiency of the furnace and the corresponding energy Sankey diagram. The first low efficiency of the furnace on heat balance method is found to be 42%.