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Wild thought about HVAC

Discussion in 'Model 3' started by Torinyao, May 25, 2020.

  1. Torinyao

    Torinyao New Member

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    I had the most random thought; say it’s a hot day, and you park in your garage; would it be possible to turn on the AC to help cool down the garage and maybe the adjacent rooms as well?
     
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  2. Avendit

    Avendit Member

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    No. AC moves heat from one place to another, in the case of a car, from the cabin to outside. In a garage you would just move the heat from in the cabin to in the garage, adding a couple of kw in the process and actually overall adding heat to the system.

    You need an AC system setup to move heat from your house to the outside. A car isn't it.

    You should also probably remove your -actual- address from your profile. Its meant for a general area (Fremont), not your specific house address.
     
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  3. JulienW

    JulienW Active Member

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    #3 JulienW, May 25, 2020
    Last edited: May 25, 2020
    Only if powered by wind turbines on the hood.:eek:

    Reminds me of the old "If I leave the fridge door open can I cool off the kitchen" 2ed law of thermodynamics question. :D:D
     
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  4. holmgang

    holmgang Member

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    what if you run the car on a dynamo so it generates electricity to charge the car. free charging forever!
     
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  5. Saghost

    Saghost Well-Known Member

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    It’s possible, but not without some extra effort. As noted above, the car’s AC moves heat from the air entering the cabin to the air moving through the lower part of the car’s nose.

    So the do what you described, you’d need to set up ducting from outside to the front of the car and back out again. It’s an option for extreme situations, but probably not worthwhile for the typical user and circumstances.
     
  6. Avendit

    Avendit Member

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    Bit like the answer to whether a fridge can cool the kitchen: yes if you can shove it's back side
    Outside somehow while maintaining an air tight seal.
     
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  7. KenC

    KenC Active Member

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    Why not just get a cheap DIY minisplit? It's for a garage, so installation would likely be easier, with more room for error. The lines and heat pump are precharged, etc.
     
  8. SammichLover

    SammichLover Banned

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    The Model Y could theoretically do this by turning up the interior heat.

    That of course would be temporary, and would begin reverting as soon the interior of the Y reached some maximum heat capacity where the heat pump could at best keep up with outward radiation from the Y cabin. But then the laws of thermal dynamics, "you can never win, you can't even break even, only the House can", means moving heat around is always temporary to some extent. :)
     
  9. snailboat

    snailboat Member

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    Seriously had to explain why this wouldn't work to my father-in-law about 5 times.
     
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  10. bbell

    bbell Member

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    That is similar to the argument that I get from people about putting a windmill on the car to generate power while driving. If you put a big enough windmill it might even generate extra power!
     
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  11. holmgang

    holmgang Member

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    im in! kickstarter?
     
  12. TMThree

    TMThree Member

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    I once went to a local cheesesteak plate and the guy had 4 window ac units inside, on tables running at full speed. It was hot in there.

    I didn't tell the guy that this was a stupid idea, but I did laugh at the situation.
     
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  13. Gray468

    Gray468 Member

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    If the air is cooler outside the garage than inside, an extraction fan near the peak of the roof is quite efficient and effective. Look for the “quiet” ones if the garage is next to a living space. Same goes for the attic.
     
  14. dazizmor

    dazizmor Member

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    Wait a second, so you're telling me Homer Simpson lied to me about living in the refrigerator? :)

    Homer Simpson GIF - Find & Share on GIPHY
     
  15. Knightshade

    Knightshade Well-Known Member

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  16. SlimJim

    SlimJim Member

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    Lower all 4 windows. Turn on CC and set the temp.
     
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  17. PeteC

    PeteC New Member

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    I assume from your question that your home doesn’t have A/C. Only one person mentioned your best option which is a ductless heat pump. They seemed to think that cooling the garage was your goal. That wasn’t my impression. I think I paid less than $3K for a single unit installed.
     
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  18. EmOne

    EmOne Member

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    Truly hilarious! I'm trying to guess what state...Texas and Louisiana are my picks.
     
  19. KenC

    KenC Active Member

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    Haha, you're right. I re-read the OP's comment, and it seems clear he does want to cool off his place, not his garage. I self-installed a 4-unit 36k btu LG mini split. It was about $5000 for the compressor and 4 head units and line sets. Not the easiest DIY project, but also not the hardest. Had a professional vac the lines for $200.
    IMG_3632.jpeg
     
  20. JulienW

    JulienW Active Member

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    I don't where it says that. OP says garage and MAYBE other.

     

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