Time to warm a volume of air to room temperature in a container

AI Thread Summary
To determine how long it takes for 30F air to warm to 50F in a static 50F environment, one must consider the thermal properties of the container walls and the heat transfer mechanisms involved. Buried air tubes can effectively collect mean Earth temperature for ventilation purposes, as they have been used successfully in various projects. Resources like the green building forum and information on "Google earth tubes" can provide valuable insights and experiences from others who have implemented similar systems. Understanding the specific heat capacity and thermal conductivity of materials is crucial for accurate calculations. Overall, exploring these resources can enhance the effectiveness of using buried air tubes for temperature regulation.
RecoveringMoron
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Positing an empty container, underground, with a static temperature of 50F (both container, earth, and air temperature) and a volume of X...

and introducing (and displacing) into this container a parcel of 30F air of volume Y (which is less than the volume of X)...

Is there any way to determine how much time it would take the 30F degree air Y to warm to 50F?

Thanks much. Just trying to think about if buried air tubes to collect mean Earth temperature might be useful for a project. Thanks much for any help.
 
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You need to know the thermal properties of the container walls. Pretty sure buried air tubes have been used before to preheat ventilation air. Try asking on the green building forum...

http://www.greenbuildingforum.co.uk/newforum/
 
Google earth tubes for much good information. There is a lot of experience out there with them.
 

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