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Time Lapse Infrared Video Of Steam Moving Through A Radiator In A Counter-Intuitive Way

Gordo
Gordo Member Posts: 826
For your viewing pleasure, wherewith is presented a time lapse infrared video (6 min. compressed) of a hot water type radiator heating up where the steam shoots along the bottom tappings first and shuts off the vent (not visible).
At the last few seconds of the video, the customer's hands can be seen touching where the vent is and verifying that the steam has shut the hot vent.

https://www.youtube.com/watch?v=SZLfkKD0fM4
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ethicalpaulErin Holohan HaskellHap_HazzardPrecaud

Comments

  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,787
    Great video, but I'm not sure what's counter-intuitive about it. Aside from the 4th and 5th sections being slow to heat, it looks about like I'd expect.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24
  • ethicalpaul
    ethicalpaul Member Posts: 4,187
    I would guess that the counter-intuitive part might be the idea (common in people's minds) that "steam rises" which, all things being equal it definitely does--however steam rising is trumped by steam (and air) going to low pressure every time. And the low pressure path was clearly along the bottom.

    That's how I read his meaning.

    And to correct myself a little bit...it's so easy to speak imprecisely! In open air steam doesn't really rise much. It gives up its heat to the air surrounding it, turns to condensation (becoming visible) and then that warmed air is what rises, taking the condensation with it. I'm just thinking out loud here to remind myself :)
    1 pipe Peerless 63-03L in Cedar Grove, NJ, coal > oil > NG
    Gordo
  • Precaud
    Precaud Member Posts: 369
    I knew steam was reasonable... but intuitive? That's a new one :wink:
    1950's Bryant boiler in a 1-pipe steam system at 7,000 ft in northern NM, where basements are rare.
    Gordo
  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,787
    If your intuition is informed by basic Newtonian mechanics, is it still intuition?
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24
  • ethicalpaul
    ethicalpaul Member Posts: 4,187
    I would say there are lots of things in basic mechanics that many people, including people who work with them every day, don't consider intuitive.
    1 pipe Peerless 63-03L in Cedar Grove, NJ, coal > oil > NG
  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,787
    edited February 2020
    To me things are counter-intuitive if they go against your understanding of how the world works. As your understanding increases over time, fewer things are counter-intuitive. The only things that are persistently conter-intuitive are paradoxical things you just can't get your head around no matter how hard you try.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24
  • ethicalpaul
    ethicalpaul Member Posts: 4,187
    Of course, @Hap_Hazzard, because you are a rare logical person!
    1 pipe Peerless 63-03L in Cedar Grove, NJ, coal > oil > NG
    Hap_Hazzard
  • Intplm.
    Intplm. Member Posts: 1,417
    @Gordo Nice vid. Thanks for sharing.

    And hey ! The infrared shows that you look pretty hot too 👀


    (Is that what's counter intuitive?)🙂
    Hap_HazzardGordo
  • PRR
    PRR Member Posts: 68
    Looks just like most of our radiators felt. Steam heats the first section, the top header, then the bottom header. Steam then rises in each section, but all that cold iron condenses the steam and it did not quickly rise all the way up. Also it takes time for heat to come through the iron. You can have internal steam all the way to the vent (shut-off) and the inside of the casting is 212 but the outside doesn't warm right away.

    Still a good movie. Better than most of YouTube.