Studies on Energy Utilization and Efficiency Improvement Opportunities of Messebo Cement Factory
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Date
2015-06
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Addis Ababa University
Abstract
Adequate and reliable supply of energy is required to ensure sustainable development of any
country. However, the use and conversion of primary energy results in energy waste, high cost
energy and emission. In addition, developing countries (like Ethiopia) have low awareness on
energy conservation and faced to generate more energy rather than to use the existing energy
efficiently. This studies on energy utilization and efficiency improvement opportunities of
Messebo cement factory. It aims to improve the energy efficiency of the factory by proposing
energy conservation options such as improving energy intensive equipments such as lighting
system and electric motors of the factory.
For the purpose of data analysis, a historical data regarding their energy consumption and energy
intensive equipments, such as electric motors and lighting systems were collected. Energy
efficient cement plants were selected as a benchmark to compare the energy efficiency of the
factory. As the result of data analysis the factory looses 34% of their total energy (electrical and
fuel) due to inefficient consumption and pays 45,197,841.70 birr per annum. The factory
accomplishes its activities with excess and inefficient lamps and also with low efficiency of
electric motor due to under load operating of the motor for the specific application.
By optimizing the illumination of the existing lighting system 49.87MWh of energy is saved per
annum. The respective annual cost saving is 24,936.80 birr. Another way of improving the
lighting system is through replacement of existing lamps with energy efficient lamps 49.02
MWh/year of energy is saved and the respective annual cost saving is 24,510.5 birr.
In this study, MotorMaster + international software used to select a proper electric motor in
terms of efficiency, cost effectiveness & energy saving potential. The simulation result from
MotorMaster + international also shows that through replacing low energy efficiency of electric
motors 275.5MWh of energy is saved and the respective annual cost saving is 218,970 birr per
annum with small payback period.
Key Word: Cement industry, energy utilization, energy efficiency, energy efficiency
improvement opportunities, MotorMaster + international software and energy saving
Description
Keywords
Cement industry, Energy utilization, Energy efficiency, Energy efficiency improvement opportunities, MotorMaster + international software and energy saving