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Thermal Performance

 

Temperature evolution, as measured in floor window (rock corridor output, E1 sensor, in red) and in shaded external area (D1 sensor, in black), during the period of May 2011 to November 2012, taken every one hour.
Note that, due to its higher thermal inertia, the daily and seasonal fluctuation of the E1 signal is much smaller for the rock corridor, between 8 and 20°C, whereas the external air D1 variation lies between 5 and 35°C. In addition, the difference between E1 and D1 daily averages is minimum in typical winter days and maximum in typical summer days, then reaching around 10°C. This is a clear evidence of the significant cooling in the house interior by natural convection.

 

Temperature evolution, as measured in a shaded external area (D1 sensor, in black) and in the living room of the house interior (F3 sensor, in red), during the period of May 2011 to November 2012, taken every one hour and averaged over 24 hours. Note that the difference between D1 and F3 signals is a minimum in typical winter days (southern hemisphere winter, between June and August; without use of fireplace or wood stove) and up to 5°C in summertime (cooling achieved).

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