Monday, August 3

Op-ed: How I gave up alternating current

The walls are buzzing. I know this because I have a magnet implanted in my hand and whenever I reach near an outlet I can feel them. I can feel fortresses of industry miles away burning prehistoric hydrocarbons by the megaton. I can feel the searing pain and loss of consciousness from when I was electrocuted by exposed house wiring as a boy. I can feel the deep cut of the power bill when I was living near the poverty line. I can feel the cold uncertainty of the first time the power went out due to a storm when I was a child. How long before the delicate veil of civilization turns to savagery with no light nor heat nor refrigeration?

The grid, smart or not, is wasteful. Power generation produces 32% of all greenhouse gases, more than any other economic sector. Most power in the US is generated by burning coal, immediately squandering 67% of its energy, then run through a steam turbine, losing another 50%, then sent across transmission lines, losing another 5%, then to charge a DC device like a cell phone another 50% is lost in conversion. This means for 100 watts of coal or oil burned my phone gets a mere 16. In this light a solar panel that is 18% efficient doesn’t seem that bad.

Instead of ever increasing our energy production, what if we focused instead on reducing our consumption? I expect power will be at a premium in our first space colonies, and DC only from solar cells. So, I embarked on an experiment to see if I could survive without the luxury of alternating current.

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