416
Thermal image of a road that was just repaved (thelemmy.club)
submitted 4 months ago by to c/mildlyinteresting@lemmy.world
89 comments fedilink hide all child comments
 

I could feel the heat coming off it when I stood next to the repaved section. They didn't repave the parking area at the edge. Opened to traffic again, seems firm enough to drive on at 160⁰F.

you are viewing a single comment's thread
view the rest of the comments
[–] -3 points 4 months ago (2 children)

If the car isn't using outside air for cooling, where is the heat going?

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 4 child comments
    •
  • [–] 6 points 4 months ago (1 child)

    Based on the image they shared, the heat goes into the refrigerant, which then goes to a radiator to transfer into the outside air.

    It doesn't use outside air in the sense that the battery doesn't transfer heat directly to the outside air. There's the refrigerant between the two.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 2 child comments
    •
  • [–] -1 points 4 months ago (1 child)

    Right, that's what I'm getting at. The heat indeed gets transfered to the outside air.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 2 child comments
    •
  • [–] 3 points 4 months ago

    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.

  • permalink
  • fedilink
  • source
  • parent
  • [–] 4 points 4 months ago (1 child)

    The same way a fridge works

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 2 child comments
    •
  • [–] -1 points 4 months ago (3 children)

    So, where does that heat go?

    Last I checked, a fridge uses the outside air to cool the heat exchanger

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 6 child comments
    •
  • [–] 3 points 4 months ago

    Compressor heats up coolant, coolant exchanges heat with outside, cools down then evaporator cools it further, heat exchanges with cold loop then goes to be compressed again. It's the same principle that freezers and ac use, with the phase changes of the coolant you force them to move thermal energy in the desired direction.

  • permalink
  • fedilink
  • source
  • parent