The Impact of Internal Insulation on Heat Transport through the Wall: Case Study

Krause, P.; Nowoświat, Artur; Pawłowski, K.

doi:10.3390/app10217484

Cited by 13 publications

(7 citation statements)

References 36 publications

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“…The authors of works [36,37] present the results of field investigations of external enclosures on the various building facades. They also note that there are increasing heat losses through separate areas of the facade, caused by the negative effect of thermal bridges.…”

Section: Discussionmentioning

confidence: 99%

Full-Fledged Use of Semi-Basement Space by Building Seismic-Resistance, Energy-Efficiency, Microclimate and Preventing Influences of Thermal Bridges and Mold Growth

Boronbaev¹,

Unaspekov²,

Abdyldaeva³

et al. 2022

cea

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The known theory and experience of energy-saving architecture allow solving the article's task and ensuring sufficient insolation, passive solar heating, and occupants contact with nature through semi-basement windows. The goal is a full-fledged use of the semi-basement space achieved for seismically active regions with a moderate, cold, and hot climate by ensuring the normative seismic-resistance, energy-efficiency, and microclimate of the building and preventing influence of thermal bridges and mold growth. The set of recommendations also covers the provision of the required sanitary-hygienic conditions in the semi-basement rooms. The multidisciplinary problem is solved by integrating the methodologies of various fields of science. By means of numerical investigations, it established that the soil adjacent to the semi-basement foundation wall increases the thermal mass and building envelope heat-protection capacity. The isotherms and the intensity of heat fluxes made it possible to eliminate the effect of thermal bridges that interact with the soil and outside air. The expedient thickness and width of the additional layer of thermal insulation of thermal bridge zones in excess of the normative layer of the enclosure's thermal insulation were established. The graphical dependence of the wall's inner corner temperature from this width allows selecting the microclimate level. A multilateral contribution to building improvement is derived from a single-family home example: comfortable microclimate conditions have been created in the semi-basement for placing main rooms there; energy savings for heating this space is 16-20%; saving of monolithic frame and foundation concrete is 10-12% ensuring the higher than normative building seismic-resistance.

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Section: Discussionmentioning

confidence: 99%

Full-Fledged Use of Semi-Basement Space by Building Seismic-Resistance, Energy-Efficiency, Microclimate and Preventing Influences of Thermal Bridges and Mold Growth

Boronbaev¹,

Unaspekov²,

Abdyldaeva³

et al. 2022

cea

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“…The predicted mean vote (PMV) and predicted percentage of dissatisfied (PPD) were proposed by Fanger as comfort indicators [30]. Many studies related to PMV have been performed, including those on insulation performance [31][32][33][34].…”

Section: Analysis On 15 Januarymentioning

confidence: 99%

Evaluation of Thermal Comfort with and without Fill Using a Thermal Environment Analysis Method for Building Envelopes with Thermally Complex Geometry: A Case Study in Hokkaido, Japan

Yamamoto

2023

Buildings

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Recently, the number of buildings with curved surfaces has been increasing. Although these buildings are not complex from a design perspective, they are thermally complex from an environmental engineering perspective. Computational fluid dynamics (CFD) is a tool used in environmental engineering analysis that requires advanced analysis techniques. Its analysis load is high, making its use impractical in design. Therefore, a coupled analysis method was developed using the two-dimensional heat flow calculation tool Hygrabe, energy simulation, and CFD. Using this method, the environmental analysis of a building with fill in Hokkaido, Japan, was performed and the accuracy of the analysis was verified. The results of the coupled analysis model were used to evaluate thermal insulation performance. The high thermostability of the fill contributes to the high degree of freedom of the exterior skin and is highly useful for design. The results show that the thermal performance of the building envelope with and without fill did not change the insulation performance. The results for January 15 were below −3.0 °C for all insulation performance levels but higher than the outside air temperature during the night.

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“…The results demonstrate that the hollow blocks’ low emissivity will contribute significantly to a reduction in construction energy use. The thermal efficiency of hollow bricks has been passively enhanced by filling the holes with insulating materials (Ashouri et al, 2016; Hou et al, 2018; Huang et al, 2020; Hu et al, 2021; Krause et al, 2020; Li et al, 2018; Rosti et al, 2020; Yuan et al, 2017; Zhou et al, 2018). Hu et al (2021) studied the impact of the filling ratio of EPS on the insulation performance of the hollow block.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of combined heat transfers through concrete hollow bricks in a hot climate of Morocco

Jamal

Moutaouakil

Boukendil

et al. 2023

Journal of Building Physics

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The aim of this study is to determine the thermal conductance of concrete hollow bricks, which is crucial for assessing the energy efficiency of buildings. The study focuses on three types of concrete hollow bricks that are frequently used to build walls in Morocco. The three modes of heat transfer by convection, conduction and radiation are taken into account. The thermal behavior of the three types was simulated using a computational model created with the finite volume method. The effect of internal surfaces emissivity and solid wall thermal conductivity on overall heat transfer is investigated using practical values of the thermal excitations. Simulation results of the three types were compared and showed that the concrete hollow brick of Type (C) is the best performing configuration. Indeed, it reduces the thermal conductance ( U-value) by 40% compared to hollow brick of Type (B), which will contribute to improve the thermal resistance of the building walls.

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The Impact of Internal Insulation on Heat Transport through the Wall: Case Study

Cited by 13 publications

References 36 publications

Full-Fledged Use of Semi-Basement Space by Building Seismic-Resistance, Energy-Efficiency, Microclimate and Preventing Influences of Thermal Bridges and Mold Growth

Full-Fledged Use of Semi-Basement Space by Building Seismic-Resistance, Energy-Efficiency, Microclimate and Preventing Influences of Thermal Bridges and Mold Growth

Evaluation of Thermal Comfort with and without Fill Using a Thermal Environment Analysis Method for Building Envelopes with Thermally Complex Geometry: A Case Study in Hokkaido, Japan

Numerical analysis of combined heat transfers through concrete hollow bricks in a hot climate of Morocco

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