Benefit of the integration of visible and thermal infrared images for the survey and energy efficiency analysis in the construction field

Abstract

Infrared thermography is a non-invasive and non-contact technique that provides surface temperature distribution by measuring infrared radiation emitted by a body. The instrument that can determine the surface temperature of the object indicated is the thermal-camera. Nowadays, the use of thermal imaging is increasingly widespread and its application fi elds are numerous, especially in the construction environment. In this way, using a modern thermal-camera, it has showed in this paper the high performance of temperature map generated by these instruments. The integration of thermal camera with optical sensors allows to obtain, by a suitable methodology, a high quality of thermal image. Indeed, taking in account large building, it is impossible to cover the whole building and at the same time acquire with a high geometric resolution in relation to the modern thermal camera. In order to identify anomalies temperature on large and modern structure, a case study of the use of thermal images building is showed in the manuscript. Indeed, the knowledge of temperature distribution on the facade of the building provides very useful information to discover many hidden conditions related to the building performance, maintenance and energy effi cient. Because the construction fi eld accounts for 40% of energy demand in Europe, the use of thermal images in this environment provides an important contribute in the analyses process of temperature archived on the buildings.

Method and experimental investigation of surface heat dissipation measurement using 3D thermography

“…Orthothermograms (distortion-free and true to scale 2D thermal images) are created from the data and segmentation is used to calculate the heat loss of walls and windows separately. In González-Aguilera et al (2013) as well as Parente and Pepe (2019), these orthothermograms are generated for building facades. In Parente and Pepe (2019) the objective of the study is the detection of different window qualities, whereas in González-Aguilera et al (2013) the transmission heat losses of the building walls are estimated by additionally measuring the interior temperature.…”