SUNConferences, 27th Annual Conference of the SA Institute for Industrial Engineering

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EVALUATION OF ELECTRICAL ENERGY CONSUMPTION BY A HOT-DIP GALVANISING PLANT
Mendon Dewa

Last modified: 2016-10-05

Abstract


The galvanising industry is generally characterised by significant consumption of energy.  Over 75% of South African plants in the galvanising sector use electric furnaces, an approach was originally prompted by the previous low price of electricity. The biggest challenge now is that from year 2008, electricity prices have risen considerably. It is against this background that an energy assessment was conducted on a batch hot-dip galvanising plant in order to identify potential opportunities for the reduction and more efficient use of electrical energy. The methodology which was adopted commenced with an evaluation of the organisation in terms of its awareness to energy management and commitment to improving on energy efficiency. The methodology also entailed compiling a detailed electrical energy balance and identifying the most significant energy users of electricity. An assessment of the results revealed that the galvanising kettle was the most significant energy user. A heat loss calculator was then used for evaluating energy saving initiatives for the significant energy users after which recommendations were made for reducing the energy consumption of the galvaniser.