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一、各种电流密度的经济比较将一个工厂在不同电流密度下,每吨电铜所负担的(1)电费;(2)金银损失;(3)固定资产折旧和维修费;(4)固定资产和流动资金利息算出后,分别相加。如果在某一电流密度下,上述四项之和为最小时,则此电流密度应该是最经济的电流密度。兹将在各种电流密度下,每吨电铜所负担的电费、金银损失、固定资产折旧和维修费、以及固定资产和流动资金利息,分别计算如下:
First, the economic comparison of various current densities (1) The electricity bill per ton of copper consumed by a factory at different current densities; (2) The loss of gold and silver; (3) Depreciation and maintenance of fixed assets; (4) Interests on fixed assets and working capital are calculated separately and added separately. If at a certain current density, the sum of the above four is the smallest, then the current density should be the most economical current density. We will calculate the cost of electricity, loss of gold and silver, depreciation and maintenance of fixed assets and interest on fixed assets and working capital for each ton of copper at various current densities as follows: