Eskom is under increasing pressure to provide reliable and sustainable electricity. Demand Side
Management (DSM), offers a short– to medium–term solution to this problem. During 2009, the mining
sector consumed approximately 16% of the domestic electricity supplied by Eskom. This made the
mining sector one of the major targets for Eskom–initiated DSM programmes.
The mining industry uses compressed air for a wide variety of applications and production purposes. This
creates many opportunities to reduce electricity consumption and operating costs. Reducing the airsystem
demand may however not result in significant electrical energy savings, unless the compressed–air
supply is accurately managed to meet the reduced demand.
Until recently, compressor control in the mining sector generally consisted of operating the compressors
continuously, regardless of the actual demand for compressed air. Excessive compressed air is blown off
into the atmosphere resulting in energy loss. This usually occurs when the compressors are operated
manually.
A computer–controlled compressor management solution, which optimises the efficiency potential of the
compressed–air supply, is required to obtain significant electrical energy savings. The need for such a
solution was addressed by the development of an energy management solution for mine compressor
systems. This solution is referred to as Energy Management System (EMS) and is capable of starting,
stopping, loading and unloading compressors. In addition to this, compressor output can be controlled to
maintain a desired pressure set–point.
In this study, the development and implementation of EMS on ten different mine compressor systems is
presented. Automatic compressor capacity control was implemented, while an operator manually initiated
compressor starting; stopping; loading and unloading, according to EMS control schedules.
Centralised compressor control is one of the main advantages offered by EMS, especially for
compressed–air systems with multiple compressor systems at different geographic locations. EMS
facilitated effective and sustainable electrical energy reductions for all these compressed–air systems. / Thesis (M. Ing. (Computer and Electronical Engineering))--North-West University, Potchefstroom Campus, 2011.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:nwu/oai:dspace.nwu.ac.za:10394/4695 |
| Date | January 2010 |
| Creators | Du Plessis, Johan Nicolaas |
| Publisher | North-West University |
| Source Sets | South African National ETD Portal |
| Detected Language | English |
| Type | Thesis |
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