Heat vs Cold Protection/Insulation

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The discussion centers on the comparative difficulty and energy consumption of heat versus cold protection in insulation. An example is presented involving a void cube with a specific insulation material, questioning the internal temperature changes when exposed to different external temperatures. It is noted that heat transfer formulas rely on temperature differences, indicating that the principles apply equally in both heating and cooling scenarios. The conclusion drawn is that the behavior of heat transfer is consistent regardless of whether it is heat entering or leaving the insulated space. Understanding these principles is crucial for effective insulation design.
chienphong
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Hi, guys!

First of all, I am no physicist. I am an architect from Vietnam.

A few friends and I just had an discussion regarding heat and cold protection in general. Then came across a question of whether it is more difficult and energy consuming for heat protection or for cold protection, or is it the same. Let's take an example. We have a void cube (with air inside) of a certain peripheral insulation material. Let's say that we somehow adjust the inside temperature of the cube at 10 degrees Celsius and put the cube in a contant air (same type of air as in the cube) environment of 30 degrees Celsius and after 1 hour the temperature inside the cube is 15 degrees Celsius. The question is: if we adjust the inside temperature of the cube at 20 degrees Celsius and put the cube in a constant air (same type of air as in the cube) environment of 0 degree Celsius, what is the temperature inside the cube after 1 hour? Would it be 15 degress Celsius? or higher? or lower?

I would really appreciate the answer and full back up knowledge for that. Thanks a lot!
 
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It is the same in both directions. Formulas for heat transfer use the temperature difference. If the difference is negative, the heat flows in the other direction, but the magnitude is the same.
 
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