Energy Efficiency of a Manufacturing Industry: A Case Study Of Nigeria Eagle Flour Mills Limited, Ibadan
Abstract
The use of energy pervades every aspect of modern society but it is not efficiently used in many industries. In view of the fact that there is an incessant increase in fuel costs, energy efficiency studies are thus rapidly becoming more important. Therefore, this study investigates the energy efficiency in Nigerian Eagle Flour Mills Limited, Ibadan. An analysis/audit is made of energy consumption in the company for a period of five years i.e. 1996 – 2000. The results show that energy is not quite efficiently utilized because the energy productivity increased substantially from 0.369 MJkg–1 in 1996 to 0.716 MJkg–1 in the year 2000. An average of 47,810.59 GJ of energy is consumed annually within this period with 44.68%, 0.23%, 42.16% and 12.93% of this energy accruing from electricity, lubricants, diesel and petrol, respectively. The average energy productivity, the average intensity of energy and the average cost of energy input per unit kg are 0.527 MJkg–1, 1.084 GJm–2 and 28 kobo/kg, respectively. The average value of the normalized performance indicator (NPI) obtained is 0.199 GJm–2 which indicates substantial energy consumption for the building type.
References
Aiyedun, P.O., Ologunye, O.B. 2001. Energy Efficiency of a private sector with Cadbury Nigeria Plc, Ikeja, Lagos as a case study. NSE Technical Transactions, Vol. 36, No. 2, pp. 59 – 66.
Aiyedun, P.O., Onakoya, B.A. 2002. Energy Efficiency of a private sector production company. Nigerian Journal of Industrial and Systems Studies, NJISS, Vol. 1, No. 4, pp. 15 – 24.
Albert T. 1991. Plant engineers and managers guide to energy conservation, 5th edition, The Fairmont Press, Inc. UK.
Eastop, T.D., Croft, D.R. 1990. Energy Efficiency, Addison Wesley Longman Limited, England.
Eastop, T.D., McConkey, A. 1996. Applied thermodynamics for engineering technology, Longman Publishers, Singapore.
Esan, A.A. 1998. Electri-energy management in factory. The Nigerian Engineers, NSE Publication Ltd, Lagos.
Fuel Efficiency Booklet, 1993. Energy audit for industry. Department of Environment, Energy Efficiency Office, U.K.
Garba, B. 1999. Mechanisms and biochemistry of methanogenesis in biogas production. Nigerian Journal of Renewable Energy, Vol. 7, No. 1 & 2, pp. 12 – 16.
Garba, B., Sambo, A.S., Danshehu, B.G. 1995. Effect of some operating parameters on biogas production. Renewable Energy, Vol. 6, pp. 343 – 347.
Maurice, J., Wilson, P.E. 1998. Heat energy from waste incineration: cash for trash. Handbook of Energy Conservation for Mechanical Systems in Buildings. Van Nostrand Reinhold Company, New York.
Momoh, S., Soaga, J. 1999. Biomass energy consumption in Nigeria: Integrating demand and supply. Nigerian Journal of Renewable Energy, Vol. 7, No. 1 & 2, pp. 78 – 82.
Payne, G.A., 1997. The energy manager’s handbook. IPC Science and Technology Press Ltd, UK.
Smith, C.B. 1998. Efficient electricity use, 3rd edition. Pergamon Press, Inc. Oxford.
Smith, T.E. 1999. Industrial energy management for cost reduction. Ann Arbor Science Publishers, Inc, USA.
