Comment on Why is there steam coming out of the streets in New York

• lord_ryvan@ttrpg.network ⁨5⁩ ⁨days⁩ ago

  Wouldn’t it cool off in the sewer, though?

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  • Coreidan@lemmy.world ⁨5⁩ ⁨days⁩ ago

    Yes but hot water continues to flow in.

    And it doesn’t need to stay very hot. It just needs to be warmer than the outside air temperature in order for vapor to form.

    The ground and continuous hot water input keeps everything insulated.

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    • dysprosium@lemmy.dbzer0.com ⁨5⁩ ⁨days⁩ ago

      But cold water is also continuously flowing in. And as someone said, it perhaps cools down quickly. Is that all and all enough for such a dense vapor cloud to appear as in pic?

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      • Coreidan@lemmy.world ⁨5⁩ ⁨days⁩ ago

        More hot water than cold water is flowing in. It’s a simple thermodynamics problem

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      • AngryCommieKender@lemmy.world ⁨5⁩ ⁨days⁩ ago

        If it is colder than the ambient temperature of the ground, IIRC that’s somewhere in the 50° F range, and less humid than the sewers, sure.

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