Evaluating in situ thermal transmittance of green buildings masonries—A case study

By Francesco Asdrubali, F. D’Alessandro, G. Baldinelli, F. Bianchi. 2014

162 citations recorded by the source corpus.

Abstract The determination of the thermal properties of a building envelope is fundamental for the correct design of energy efficient constructions. Opaque walls can be easily modeled as parallel and homogeneous layers, being characterized by a monodimensional thermal flux which allows to evaluate the thermal transmittance with analytical models. These procedures are well established and they lead to reliable results; however, it is important to verify the actual performance with in situ thermal transmittance measurements. This analysis is more important when the wall performance is high, being closely linked to economic assessments. The paper presents the results of a measurement campaign of in situ thermal transmittance, performed in some buildings in the Umbria Region (Italy), designed implementing bio-architecture solutions. The analyzed walls were previously monitored with thermographic surveys in order to assess the correct application of the sensors. Results of the investigation show that in situ thermal transmittance measurements and theoretical calculated U -value are not in perfect agreement. The mismatch becomes important for monolithic structures such as walls made of thermal blocks without insulating layers.

Subfields: Building and Construction, Environmental Engineering, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/a4029ea3a3a19623fae79b82fd3f4ef9937062ee

How researchers see this paper

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In Building and Construction

1. Francesco Asdrubali
2. S. Schiavoni
3. F. D’Alessandro

Citations in the corpus

• A review of unconventional sustainable building insulation materials (2015, methodology): “Thermal transmittance can also be estimated with the ISO 6946 calculation method [25], but several comparative studies demonstrated that the calculated U-values are usually lower than the measured ones [26,27].”