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614
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2 yr. ago

  • If you charge overnight, the base load is less likely to be fossil fuel. If it is fossil fuel, emission controls on a power plant are far more effective than anything with wheels.

    The average car emits 400g CO2 per mile
    https://www.epa.gov/greenvehicles/greenhouse-gas-emissions-typical-passenger-vehicle#driving

    My power company emits 364g per kWh, which will take an EV about 3 miles. So that's ~120g CO2 per mile, one third of a gasoline car.
    https://www.climatiq.io/data/emission-factor/65ad9f91-28a1-45b2-bbab-3dcdd5de6a46

    That's the total mix- natural gas is the primary peak fuel so charging at night is likely less than 100g/mile

  • They're so fucking myopic. A $50k per year chemical manufacturing operator is going to fuck up $20k worth of equipment and finished product a year compared to a $65k per year.

    A $100k/yr technician will save your bacon twice a month and make it look easy. The $70k/yr parts changer will misdiagnose away that $30k you 'saved' in about 6 months.

  • A 12 oz glass bottle takes roughly 1100 BTUs to melt the glass for. That is conveniently, roughly, 1.1 cubic ft of natural gas.

    60,000 BTU/hr is a very common size for natural gas HVAC furnaces. That's basically a bottle a minute, just to give people an idea.

    There are other inputs of course, but furnace net efficiency is around 2200 BTU/lb

  • It's really more about automated assembly which ultimately is about saving labor cost. A worm clamp is impossible to automate. The crimps are more reliable and easier to automate.

    Here is the manual assembly process, and per usual, disassembly is the reverse

    https://knowhow.napaonline.com/how-to-repair-an-air-hose/