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Joined 3 years ago
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Cake day: June 4th, 2023

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  • A quick lesson on logical reasoning:

    If you want to show that a piece of technology A is inefficient and you know that another piece of tech B is more efficient, then you can use the inefficiency of B as evidence for the inefficiencies of A. Basically, for some inefficiency threshold T where any value above T is poor efficiency, then A>B and B>T means that A>T.

    Here, we’re comparing vapour-compression (A) and solid state (B) heat pumps. Solid states are much more inefficient. So you have A<B and B>T. You can’t use this to make any claims about the relationship between A and T.



  • It makes more sense if you read the context. They’re responding to a comment that said this:

    I guess you don’t understand active cooling then. If the coolest air in front of you is ~160⁰F, well that’s the coolest your batteries are gonna get, at best. Which is way hotter than rated temperatures for lithium batteries…

    A response that says “it’s not X” can be interpreted as “it’s not doing the thing you said it’s doing”. In this case, over_clox is saying that heat transfers directly from the battery to the air.











  • Pressure cook a whole rotisserie chicken (bones, meat, and all) for 20ish minutes for amazing chicken stock.

    Better yet, eat the meat and pressure cook the bones. You still get great chicken stock, and also get to enjoy some good chicken. If one bird doesn’t give you enough bones, freeze it until you accumulate enough.