Analyzing Thermal Images to Evaluate Thermal Protection in Residential Structures: Lessons from Russian Practices

¹ Research Engineer, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia
² Senior lecturer of the department of Heat, Gas and Water Supply, Vologda State University, Vologda, Russian Federation
³ Associate professor, associate professor of the Department of Heat, Gas and Water Supply, Vologda State University, Vologda, Russian Federation
⁴ Peter the Great St. Petersburg Polytechnic University, Saint Petersburg 195251, Russian Federation
⁵ Lovely Professional University, Phagwara, Punjab, India
⁶ Department of EEE, GRIET, Bachupally, Hyderabad, Telangana, India
⁷ Uttaranchal University, Dehradun 248007, India
⁸ Centre of Research Impact and Outcome, Chitkara University, Rajpura 140417, Punjab, India
⁹ Chitkara Centre for Research and Development, Chitkara University, Himachal Pradesh - 174103 India

^* Corresponding author: abhinav.mishra.orp@chitkara.edu.in
Scopus ID: 58675942000 vafaeva.khm@gmail.com
Scopus ID: 57210325021 karpovdf@vogu35.ru; karpov_denis_85@mail.ru
Scopus ID: 57204361039 pavlovmv@vogu35.ru; pavlov_kaftgv@mail.ru
sauravarambol@gmail.com
sri.davu@gmail.com
jt.registrar@uumail.in
rahul.thakur.orp@chitkara.edu.in

Abstract

Building thermography is a non-destructive and effective method for diagnosing the thermal insulation of buildings with various purposes. Regardless of the specifics of conducting thermographic surveys, the obtained thermal images (thermograms) can be analyzed both qualitatively and quantitatively. The first method of analyzing thermal images is implemented using specialized software typically provided with the thermal imaging camera. The second method is carried out based on the results of thermographic surveys following the methodologies regulated by the country’s normative documents. Using the example of thermographic inspection of enclosing structures in a multi-story residential building constructed from reinforced concrete panels, a qualitative assessment of thermal images was conducted to identify potential thermal defects. Thermal bridges were detected in the area of vertical joints of panel plates, and excessive heat losses were identified in the region where the heating device niche is located.Quantitative assessment of thermal images revealed that the thermal resistance in the temperature anomaly area is nearly twice as low as the thermal resistance in the baseline section of the thermogram. One of the variations for evaluating the error of indirect measurements of relative thermal resistance is presented, taking into account the range of measuring instruments used. Verification of the thermal resistance of the enclosing structure of the external wall of the residential building was conducted to ensure compliance with sanitary and hygienic requirements. According to the results of in-situ measurements, it was determined that the temperature on the inner surface of the enclosure was lower than the specified value.