No abstract

It is well known that at a European level, a large building fund must be retrofitted by 2050 to meet the climate and energy targets defined by a reduction of greenhouse gas emissions up to 80 - 95% compared to 1990 levels. In this regard, the proposed recast of the energy performance directive defines a new path: going from nearly Zero Energy Buildings to Zero Emission Buildings for residential and non-residential buildings. Thus, practitioners need more adequate instruments to perform reliable field measurements that can later be used for providing retrofit solutions. In recent years it was observed that infrared thermography could be an excellent substitution for already used techniques that require a significant number of sensors or various equipment. The paper presents an overview of the aerial and terrestrial thermography applications and a description of the THERMOG research project, which focuses on using the thermal imaging approach as both a qualitative and a quantitative approach. The project aims to develop a methodology accompanied by software that evaluates the thermal performance of the building envelope under actual operating conditions using aerial and terrestrial thermography methods. The calculation methodology and the associated software will also be used in the structural and energy expertise activity of buildings, as well as in assessing the energy performance of a new building before the reception phase.

It is well known that the thermal performance of a building is influenced by the solutions that define the building’s envelope. In the case of industrial buildings, due to the use of different envelope solutions (e.g. sandwich panels, prefabricated concrete panels etc.), the types of thermal bridge details are often different in comparison to those currently found in residential, office and administrative buildings. Thus, several numerical simulations were performed by analysing details of envelope elements identified at industrial buildings, especially the areas prone to intensified heat flow (joint areas, intersections, glazed surfaces, and others.). Therefore, the paper will present the assessment of thermal bridge details for four industrial buildings having various destinations. The effects of two-dimensional heat transfer in envelope elements, such as windows, walls, foundations, roofs and doors, will be evaluated. The impact of the thermal bridges will be measured by verifying to what extent the level of thermal performance of each envelope component meets the thermal resistance requirements, as well as the building envelope ensures the global heat transfer coefficient for each of the studied cases. A series of conclusions and recommendations will be provided for specialists and designers in the building energetics field.

The present paper is focused on the assessment of industrial buildings from their thermal and energy performance perspective, driven by the need to reduce energy consumption and CO2 emissions on a worldwide level. A state of the art will be elaborated regarding the environmental impact of buildings that led to an increased pressure on a more energy efficient design. The focus will afterwards turn on the constructive solutions of industrial buildings for a better understanding of their elements and materials used. Aspects regarding the national and international stock of industrial and logistics spaces, demand, price range and future evolution of this sector, are also presented. Description and comparison is conducted on the building envelope thermal performance and its impact on the energy performance of buildings. Several conclusions will be drawn based on the obtained energy indexes and future research paths will be suggested.