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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Meeting the reduced availability and rising costs of electrical power: Anglo Platinum ventilation and cooling strategies
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Meeting the reduced availability and rising costs of electrical power: Anglo Platinum ventilation and cooling strategies

机译：满足降低的可用性和不断上​​涨的电力成本：盎格鲁铂金通风和冷却策略

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摘要

The reality of rising electrical power costs and the haunting prospect of decreasing electrical power availability are a threat to the growth of new projects and expansion programmes that could negatively affect the sustainability of mining operations. These threats require the adoption of effective power saving measures aimed at three principal objectives: the elimination of wastage, the reduction of power usage particularly during peak demand periods and, more importantly, improving the efficiency of high power-demand processes. It is reasonable to assume that the greatest impact will be achieved by concentrating on those processes that are large electrical power consumers. For Anglo Platinum operations, mine ventilation and, currently to a lesser extent, mine cooling are two continuous processes that fall in this category. It is estimated that these may consume fifteen to thirty-five per cent of the power delivered to the shaft head-depending on the shaft's design. Mine ventilation systems suffer from inherent, historical inefficiencies that lead to excessive power consumption. Air cooling systems are designed to be energy-wise in terms of modulating refrigeration plant operation to meet the underground requirements while maximizing use of 'free' cooling from surface conditions. Currently about ninety-five per cent of the refrigeration capacity used in Anglo Platinum mines is dedicated to surface bulk air coolers. The net thermal efficiency of these systems is compromised as mines expand in depth and on strike. Looking to the future, this practice will be complemented by more energy demanding underground cooling tactics requiring considerably higher electrical power consumption per unit ton produced. To counter this increase in power consumption, more energy-efficient systems and advantageous transient strategies such as thermal storage and the use of ice-on surface and possibly even underground-are being considered. This paper describes work currently undertaken and planned by Anglo Platinum operations to reduce power consumption by main fans during off-shift periods, the associated efforts currently introduced to reduce underground air leakage, the possibility of introducing more efficient auxiliary ventilation systems, the feasibility of thermal storage, and a brief look at energy recovery system as a means of countering the anticipated power demand associated with underground cooling.
机译：电力成本上涨的现实和电力供应减少的潜在前景对新项目和扩建计划的增长构成了威胁，可能对采矿作业的可持续性产生负面影响。这些威胁要求采取针对三个主要目标的有效节能措施：消除浪费，减少电力使用，尤其是在高峰需求时期，以及更重要的是提高高电力需求流程的效率。可以合理地假设，通过专注于那些消耗大量电能的过程，可以实现最大的影响。对于盎格鲁白金矿运营而言，矿井通风和目前较小程度的矿井冷却是属于此类的两个连续过程。据估计，根据轴的设计，这些功率可能消耗传递到轴头的功率的15％至35％。矿井通风系统存在固有的历史效率低下的问题，导致效率过高。空气冷却系统在调节制冷设备的运行以满足地下需求的同时，从能源角度而言设计得当，同时最大限度地利用了地面条件下的“免费”冷却。目前，盎格鲁铂金矿使用的制冷能力中约有百分之九十五专用于地面散装空气冷却器。这些系统的净热效率会随着地雷的扩展和罢工而受到损害。展望未来，这种做法将辅之以对能源的更高要求的地下冷却策略，这些策略要求每生产一单位吨的电耗要高得多。为了应对这种功耗的增加，正在考虑采用更节能的系统和有利的瞬态策略，例如蓄热，使用冰上表面甚至可能使用地下表面。本文介绍了英美资源集团铂金业务目前为减少轮班期间主风扇的能耗而进行的和计划的工作，目前为减少地下空气泄漏而采取的相关措施，采用更高效的辅助通风系统的可能性以及热力发电的可行性。存储，并简要介绍了能量回收系统，以应对与地下冷却相关的预期电力需求。

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