The Influence of Linear Thermal Transmittance of Thermal Bridges on the Energy Performance Class of Buildings – Simplified Method

Vunjak, Danilo; Čeh, Arpad; Đurić, Neđo; Karaman, Golub; Hegediš, Ivan

doi:10.7251/afts.2016.0814.073v

Cited by 4 publications

(4 citation statements)

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“…Numerous studies in colder countries highlight that balcony slabs are one of the thermal bridges that have a significant negative impact on the energy efficiency of buildings [28][29][30][31]. They affect thermal comfort [32,33] and contribute to increased condensation issues [34,35].…”

Section: Of 26mentioning

confidence: 99%

Influence of Balcony Thermal Bridges on Energy Efficiency of Dwellings in a Warm Semi-Arid Dry Mediterranean Climate

Pérez-Carramiñana,

de la Morena-Marqués,

González-Avilés

et al. 2024

Buildings

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Thermal bridges significantly influence the energy performance of buildings. However, their impact varies depending on the type of thermal bridge, climate conditions, construction methodologies, and geometric characteristics of the building. On the Spanish Mediterranean coast, buildings with large balconies are predominant. Nevertheless, the Spanish energy efficiency regulations do not adequately specify the thermal bridges at the junctions of balconies with facades, leading to a lack of consideration for their influence in the majority of architectural projects. The objective of this study is to qualitatively and quantitatively assess the impact of such thermal bridges on the energy efficiency of buildings in a dry Mediterranean climate (BShs) within a warm semi-arid climate (BSh). As a case study, the influence of this thermal bridge is analyzed in two residential buildings located on the Mediterranean coast of southeastern Spain. The study also examines the modification of various construction parameters of this thermal bridge and determines the optimal design parameters to reduce its thermal transmittance. The results demonstrate that the energy needs caused by thermal bridges account for approximately 40% of the total annual energy needs of the studied residential buildings. Balcony thermal bridges account for 25% to 40% of the energy needs caused by all thermal bridges. The lack of differentiation in Spanish standards between balcony–facade and facade–slab edge junctions causes an imprecision in calculations equivalent to 12% of the total annual energy needs of dwellings. The novelty of this research lies in highlighting that current regulations and calculation programs need improvement to better characterize balcony thermal bridges and enhance the accuracy of building energy efficiency calculations.

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Section: Of 26mentioning

confidence: 99%

Influence of Balcony Thermal Bridges on Energy Efficiency of Dwellings in a Warm Semi-Arid Dry Mediterranean Climate

Pérez-Carramiñana,

de la Morena-Marqués,

González-Avilés

et al. 2024

Buildings

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“…The mentioned models are used in different occasions, for example: controlling the air quality, developing the advanced strategies in traffic management, interpretation of measurements results, studies drafting about exposure of the urban population with different pollutants, foreseeing of contamination, etc. When the profiles of the streets are according to the space characteristics of the canyon type, i. e. when the buildings are sequentially directly along the street, the problem are multiplying because of the weak circulation [35].…”

Section: Modelling Of the Canyon Type Of Streets And Increase Of The mentioning

confidence: 99%

Theory and smart practice in the reduction of negative effects of urban heat island

Stevovic¹,

Lj.²,

Djuric³

2018

THERM SCI

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Urban environment could be considered as a complex biotechnical system. Multidisciplinary, interdisciplinary, and intradisciplinary analyses are required in order to achieve sustainable urban communities and healthier cities, especially in the era of climate changes. The main goal of this paper is to investigate, select, and review the theories and smart practices in negative effects of urban areas heat problems reduction and to define the objective function of the issue. The objective function could be treated as the force, with magnitude and direction of influence that operates in a certain space, which is considered to control certain factors and parameters, including time as a dimension. Spatial and temporal gradient of canyon effect are defined with nodes canyon effects interaction. The thermal islands are analyzed by its volume, sources of heat, thermal gradient, with the goal to select strategies to reduce the negative effects of heat islands. Positive smart practice in the world is discussed. The purpose of this study is to find, by literature review and by holistic methodological approach application, better practice and adequate solutions for building, energy, water, and carbon balance in urban environment. The results are expected in the movement towards the blue and green cities.

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“… analysis of thermal losses in buildings [3,4,9,14,18];  analysis of energy efficiency and flexibility of the air conditioning and heating [1,15];  creating and improving calculation methods, algorithms to achieve optimal and effective energy consumption during peak hours [7,8,13,17];  experimental research using modern materials and studying their impact on increasing energy efficiency of buildings [11,16];  developing heat indicators and energy efficiency class limits in buildings [2,5,10,12]. The research papers analyzed point to a lack of studies on the impact of the microclimate of residential buildings on their efficiency.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Study of the Microclimate Parameters in the Residential Building

et al. 2021

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The relevance of the research lies in the development of the current question about the influence of microclimate quality on the efficiency of residential units. The aim of the study is to examine how the microclimate parameters affect the efficiency of residential buildings. Findings. The results obtained are essential for the design of energy-efficient and comfortable residential buildings. The scientific novelty and practical importance of research resides in the thorough study of microclimate in low-rise residential buildings. Microclimate deviation charts for residential buildings have been produced.

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The Influence of Linear Thermal Transmittance of Thermal Bridges on the Energy Performance Class of Buildings – Simplified Method

Cited by 4 publications

References 0 publications

Influence of Balcony Thermal Bridges on Energy Efficiency of Dwellings in a Warm Semi-Arid Dry Mediterranean Climate

Influence of Balcony Thermal Bridges on Energy Efficiency of Dwellings in a Warm Semi-Arid Dry Mediterranean Climate

Theory and smart practice in the reduction of negative effects of urban heat island

Comprehensive Study of the Microclimate Parameters in the Residential Building

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