I wonder if my system is good or bad. My server needs 0.1kWh.

  • MentalEdge@ani.social
    link
    fedilink
    English
    arrow-up
    53
    ·
    edit-2
    16 hours ago

    You might have your units confused.

    0.1kWh over how much time? Per day? Per hour? Per week?

    Watthours refer to total power used to do something, from a starting point to an ending point. It makes no sense to say that a device needs a certain amount of Wh, unless you’re talking about something like charging a battery to full.

    Power being used by a device, (like a computer) is just watts.

    Think of the difference between speed and distance. Watts is how fast power is being used, watt-hours is how much has been used, or will be used.

    If you have a 500 watt PC, for example, it uses 500Wh, per hour. Or 12kWh in a day.

    • cholesterol@lemmy.world
      link
      fedilink
      English
      arrow-up
      2
      ·
      5 hours ago

      If you have a 500 watt PC, for example, it uses 500Wh, per hour. Or 12kWh in a day.

      A maximum of 500 watts. Fortunately your PC doesn’t actually max out your PSU or your system would crash.

    • fool@programming.dev
      link
      fedilink
      English
      arrow-up
      20
      arrow-down
      3
      ·
      edit-2
      55 minutes ago

      I forgive 'em cuz watt hours are a disgusting unit in general

      idea what unit
      speed change in position over time meters per second m/s
      acceleration change in speed over time meters per second, per second m/s/s=m/s²
      force acceleration applied to each of unit of mass kg * m/s²
      work acceleration applied along a distance, which transfers energy kg * m/s² * m = kg * m²/s²
      power work over time kg * m² / s³
      energy expenditure power level during units of time (kg * m² / s³) * s = kg * m²/s²

      Work over time, × time, is just work! kWh are just joules (J) with extra steps! Screw kWh, I will die on this hill!!! Raaah

      • acockworkorange@mander.xyz
        link
        fedilink
        English
        arrow-up
        2
        ·
        edit-2
        3 hours ago

        Power over time could be interpreted as power/time. Power x time isn’t power, it’s energy (=== work). But otherwise I’m with you. Joules or gtfo.

      • catloaf@lemm.ee
        link
        fedilink
        English
        arrow-up
        4
        ·
        13 hours ago

        Could be worse, could be BTU. And some people still use tons (of heating/cooling).