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example 20.2
depreciation rate 0.01235
total fixed charge rate 0.142350
annual cost of efficiency motor Rs7.118000e+005per year
total electrical bill with present motors Rs2.050000e+007per year
total electrical bill with efficiency motor Rs.1.845000e+007
total annual cost if motors are replaced by high efficiency motors Rs1.916180e+007 per year
annual saving Rs1338200 per year
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present worth factor 0.14235
present worth of annual cost with existing motors Rs1.440100e+008
present worth of annual cost with new motor Rs1.296100e+008
total present worth 1.346100e+008 per year
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