According to the particularity of the open pit, the main influencing factors of mining quantity about mineral resources have been summarized systematically in life cycle and the structured hierarchical relation of its...According to the particularity of the open pit, the main influencing factors of mining quantity about mineral resources have been summarized systematically in life cycle and the structured hierarchical relation of its influencing factors has been constructed. In the light of the production process of open pit, the functional relationships between investment, mining cost and mining quantity have been defined based on the process of mining and loading so that the relation of the life cycle cost and mining quantity can be set up. And what’s more, in order to obtain the maximum economic profit of mining enterprises in life cycle, the planning model of mining quantity has been established based on the life cycle cost. The rational distribution of mining quantity will have been found on the condition of obtaining optimal solution about the planning model so as to determine scientifically the production scale of mining enterprises from the point of view of the sustainable development.展开更多
为了结合海底电缆寿命周期特点、制定适用于近海风电场高压海底电缆的选型标准,以海缆传输容量大于风电场设计向外传输容量为约束条件,构建了包括购置、敷设、损耗、故障损失、运行维护以及回收净投资成本的海缆全寿命周期成本(LCC)模型...为了结合海底电缆寿命周期特点、制定适用于近海风电场高压海底电缆的选型标准,以海缆传输容量大于风电场设计向外传输容量为约束条件,构建了包括购置、敷设、损耗、故障损失、运行维护以及回收净投资成本的海缆全寿命周期成本(LCC)模型,并以LCC等额年值最小作为选型标准。以国内某海上风电场海底电缆选型为案例进行计算分析。结果表明,购置、损耗、故障损失成本与自身LCC占比较重,最高分别达到26.4%、30.8%、62.0%;所有方案前期投资与自身LCC占比≤40%。当电压等级相同时,单芯海缆方案损耗成本至少比三芯海缆方案高出4.68×103万元;而当线芯数相同时,高电压等级故障损失成本至少比低电压等级海缆方案高出8.8×103万元;2回110 k V 3×500 mm2高压XLPE绝缘钢丝铠装海缆方案LCC等额年值(3.08×103万元/a)最小,该方案最优。展开更多
文摘According to the particularity of the open pit, the main influencing factors of mining quantity about mineral resources have been summarized systematically in life cycle and the structured hierarchical relation of its influencing factors has been constructed. In the light of the production process of open pit, the functional relationships between investment, mining cost and mining quantity have been defined based on the process of mining and loading so that the relation of the life cycle cost and mining quantity can be set up. And what’s more, in order to obtain the maximum economic profit of mining enterprises in life cycle, the planning model of mining quantity has been established based on the life cycle cost. The rational distribution of mining quantity will have been found on the condition of obtaining optimal solution about the planning model so as to determine scientifically the production scale of mining enterprises from the point of view of the sustainable development.
文摘为了结合海底电缆寿命周期特点、制定适用于近海风电场高压海底电缆的选型标准,以海缆传输容量大于风电场设计向外传输容量为约束条件,构建了包括购置、敷设、损耗、故障损失、运行维护以及回收净投资成本的海缆全寿命周期成本(LCC)模型,并以LCC等额年值最小作为选型标准。以国内某海上风电场海底电缆选型为案例进行计算分析。结果表明,购置、损耗、故障损失成本与自身LCC占比较重,最高分别达到26.4%、30.8%、62.0%;所有方案前期投资与自身LCC占比≤40%。当电压等级相同时,单芯海缆方案损耗成本至少比三芯海缆方案高出4.68×103万元;而当线芯数相同时,高电压等级故障损失成本至少比低电压等级海缆方案高出8.8×103万元;2回110 k V 3×500 mm2高压XLPE绝缘钢丝铠装海缆方案LCC等额年值(3.08×103万元/a)最小,该方案最优。
