Energy Audit of Ambo Mineral Water Factory
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Date
2019-10
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Addis Ababa University
Abstract
Ambo Mineral water factory is one of energy consuming factories in this country. In the factory,
the thermal energy developed by the boiler goes to bottle washer and energy from electricity is
used to power electrically driven equipments: electric motors and their driving systems, and
lighting. According to 2018(G.C) energy bill data, the factory paid for both thermal energy (oil) and
electric energy 5,953,395.00 Birr and 1,008,685.00 Birr respectively. The energy consuming systems
of the factory such as electric motors, boilers, air compressors, water pumps and steam distribution
systems were audited. To perform the energy audit of these major energy consuming systems,
different data (21-months, October,2017 to June, 2019 GC) were collected and analyzed by using
portable instruments, the instruments installed on systems, nameplate, referring factory log sheet
with the gross calorific value of 44,800kJ/kg of diesel oil. From the detail energy audit, by replacing
the existing electric motors and water pumps annual energy cost of around 46,000birr and
128,700birr can be saved respectively. The energy audit of the boiler indicated that, its overall
efficiency was 72.2% with possible energy conservation measures of repairing feed water treatment
plant(about 267,800Birr can be saved annually) and insulating boiler surface(26,300birr can be
saved annually). Finally, the energy audit on steam distribution lines indicated as around 71,700 birr
can be saved annually.
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Keywords
thermal energy, Energy Audit, t of Ambo Mineral Water Factory