The results are based on real data from the operating VOD systems for two of these mines. The third example represents the savings estimated at the feasibility stage to demonstrate improved metrics for a development project.
The net energy savings presented by a VOD system including up-front capital costs typically are on the order of 1% of total mining and milling costs on a per-tonne basis. Therefore, considering the average mine's profitability the implementation of VOD can increase net profit by 10% or more.
In addition, if VOD is considered at the feasibility stage or in concert with a major capital development project involving ventilation, there are often opportunities to reduce project capital costs by reducing fan and airway size.
Howden is an integrated manufacturer of hardware and software for mine ventilation control and automation. The VentSim™ CONTROL product line provides a complete Ventilation on Demand solution to help underground mines be more competitive.
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