Can Prairie Dog Tunnels Inspire Natural Home Air Conditioning?

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Discussion Overview

The discussion explores the concept of using natural designs, specifically prairie dog tunnels, as inspiration for creating natural air conditioning systems in homes. Participants examine various methods of enhancing airflow and cooling through architectural features and natural phenomena.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant notes that prairie dog tunnels create low pressure to facilitate airflow, suggesting a design for a home air conditioning system that mimics this effect using windmills.
  • Another participant argues that the proposed system might be better described as enhanced convection rather than true air conditioning, suggesting the use of window placement based on wind direction.
  • A participant shares an observation from old buildings in India, where perforated doors created a cooling effect through air passage.
  • One participant proposes a mechanism for cooling based on adiabatic processes, where compressed air is cooled before expanding, potentially leading to lower temperatures than ambient.
  • Another participant comments on the perception of coolness, noting that a breeze can feel cool even if the air temperature is not low.
  • A historical example from Iran is provided, describing a cooling system that uses underground tunnels and a chimney to enhance airflow and cooling through thermal dynamics.

Areas of Agreement / Disagreement

Participants express a range of ideas and examples regarding natural cooling methods, but there is no consensus on the effectiveness or classification of the proposed systems. Multiple competing views remain on the best approaches to natural air conditioning.

Contextual Notes

Some claims rely on specific assumptions about air behavior and thermal dynamics, which may not be universally applicable. The discussion includes various anecdotal examples that may not be directly comparable.

Who May Find This Useful

Individuals interested in sustainable architecture, natural cooling methods, and innovative design inspired by nature may find this discussion relevant.

shadowofman
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I was reading in my physics book about the way prairie dogs design their tunnels so as to produce one entrance with a low pressure in order to create air flow through the system. And it was described as being the result of air velocity over a hill.

Has anyone developed something that would create a natural air conditioner for a home? Maybe something like a windmill that would rotate with the wind outside, compressing the air and increasing the velocity, and therefore creating a low pressure moment and pulling air through a home or room?
 
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That's neat, though I don't know that I'd call it air conditioning. It's enhanced convection to replace a fan. You can do it to your house by selectively opening windows based on wind direction and height.
 
A very long time ago, I was in some very old buildings in India. They had a series of doors, perforated with holes in such a manner that once the air passed through several of them, it felt like a very cool breeze.
 
True enough. Maybe I was overthinking the possibilities.
 
Here is a possible explanation of the India cooling. If air flows into a hole and gets compressed (even slightly), then it gets heated (adiabatic compression). If the hole now conducts the heat away from the compressed air and cools the air to ambient temperature, and is then allowed to expand to ambient pressure (like in a room), it cools to below ambient temperature (adiabatic expansion). Just a thought...

Bob S
 
A breeze doesn't have to actually be cool to feel cool.
 
Many years ago Scientific American had a description of how some houses in Iran were built to stay cool in summer. The entrance for air into the house was through a tunnel which may contain water. The exit for the air was through a tall chimney that the sun heated. As the air inside the chimney got warm and rose, it pulled in cooler air through the underground passageway.
 

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