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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Dear all,
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<div><span style="font-size: 10pt;">I am modeling a residential building with the above ground floor modeled as a single zone, and a single zone basement, and I intended to use Type 1244 to confirm whether or not my first assumption to use Type 77 instead was
valid.</span></div>
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<div><span style="font-size: 10pt;">However, using type 1244, after about 2600 hours into the simulation, the boundary temperature of the soil spikes rapidly, eventually reaching unrealistic values (in the thousands of °C!). </span></div>
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<div><span style="font-size: 10pt;">I have mapped the single zone basement based on the TESS tutorial, and I have left most of the parameters for the soil unchanged, except for the Deep earth temperature (10 °C) and Amplitude of surface temperature (20 °C).
The set point in cooling for the zone is 26 °C.</span></div>
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<div><span style="font-size: 10pt;">I am running a 0.5h time step, and 0.1 °C convergence temperature, tough this last parameter did not seem to have a lot of effect on the results.</span></div>
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<div><span style="font-size: 10pt;">If anyone ever encountered this issue and could direct me to a possible solution, it would be greatly appreciated!</span></div>
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<div><span style="font-size: 10pt;">Thanks!</span></div>
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<div style="font-family:Tahoma; font-size:13px">Olivier Quevillon
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<div>Étudiant à la maîtrise en Génie Mécanique</div>
<div>École de Technologie Supérieure</div>
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