> 175 low cost machines @131KWh in household settings: USD $37 per day.
> Industrial machine @80KWh in industrial setting: USD $52.87 per day.
> The industrial machine cost a little more to run (power) but it produces 175 times more product per machine.
Wait a minute here, you multiplied the electrical cost per cheap machine by 175 since it makes 175 times less, then compared the cost of the 175 times more, then claimed it made 175 times less, but you already adjusted it to be 1 to 1. Are you double compensating here?
This is correct; there is some double compensation.
746W per machine => 7.46KWh per day. Multiply by $0.03 USD/KWh (=1.5 INR) to get $0.22/day or $0.00022 per napkin, slightly cheaper than the industrial solution. In other words, the household machines are about half as efficient with power but their cheaper rates on power more than compensates.
In terms of overall efficiency, other factors like raw materials, transportation, etc. are likely to dominate--the power expenditure is small for both options.
Wait a minute here, you multiplied the electrical cost per cheap machine by 175 since it makes 175 times less, then compared the cost of the 175 times more, then claimed it made 175 times less, but you already adjusted it to be 1 to 1. Are you double compensating here?