How to Calculate the Thermal Transmittance (U-Value) in the Envelope of a Building
When designing the envelope of projects, we must pay special attention to each of the elements that comprise it, since each of these layers has specific qualities that will be decisive in the thermal behavior of our building as a whole.
© ArchDaily
When designing the envelope of projects, we must pay special attention to each of the elements that comprise it, since each of these layers has specific qualities that will be decisive in the thermal behavior of our building as a whole. If we divide 1 m2 of our envelope by the temperature difference between its faces, we will obtain a value that corresponds to the thermal transmittance, also called U-Value. This value tells us a building's level of thermal insulation in relation to the percentage of energy that passes through it; if the resulting number is low we will have a well-isolated surface and, on the contrary, a high number alerts us of a thermally deficient surface.Expressed in W/m²·K, the U-Value depends on the thermal resistance of each of the elements that make up the surface (the percentage in which a building element is opposed to the passage of heat), and this, in particular, obeys the thickness of each layer and its thermal conductivity (ability to conduct the heat of each material). Let's review the formulas necessary to calculate the thermal transmittance of our envelope.Thermal EnvelopeThe thermal envelope is defined as the "skin" of the building, w...
© ArchDaily
When designing the envelope of projects, we must pay special attention to each of the elements that comprise it, since each of these layers has specific qualities that will be decisive in the thermal behavior of our building as a whole. If we divide 1 m2 of our envelope by the temperature difference between its faces, we will obtain a value that corresponds to the thermal transmittance, also called U-Value. This value tells us a building's level of thermal insulation in relation to the percentage of energy that passes through it; if the resulting number is low we will have a well-isolated surface and, on the contrary, a high number alerts us of a thermally deficient surface.Expressed in W/m²·K, the U-Value depends on the thermal resistance of each of the elements that make up the surface (the percentage in which a building element is opposed to the passage of heat), and this, in particular, obeys the thickness of each layer and its thermal conductivity (ability to conduct the heat of each material). Let's review the formulas necessary to calculate the thermal transmittance of our envelope.Thermal EnvelopeThe thermal envelope is defined as the "skin" of the building, w...
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