Modeling the Thermal Behavior of Egyptian Perforated Masonry Red Brick Filled with Material of Low Thermal Conductivity

Bassiouny, Ramadan; Ali, Mohamed R.; NourEldeen, El-Sadek H.

doi:10.1016/j.jobe.2015.12.002

Cited by 21 publications

(6 citation statements)

References 13 publications

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“…This has been confirmed in steady state heat transfer by some experimental and numerical studies, such as those of Zukowski and Haese [16], Tang et al [17], Pavlík et al [18], and Bassiouny et al [19].…”

Section: Introductionsupporting

confidence: 54%

Dynamic Thermal Features of Insulated Blocks: Actual Behavior and Myths

2017

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Abstract:The latest updates in the European directive on energy performance of buildings have introduced the fundamental "nearly zero-energy building (NZEB)" concept. Thus, a special focus needs to be addressed to the thermal performance of building envelopes, especially concerning the role played by thermal inertia in the energy requirements for cooling applications. In fact, a high thermal inertia of the outer walls results in a mitigation of the daily heat wave, which reduces the cooling peak load and the related energy demand. The common assumption that high mass means high thermal inertia typically leads to the use of high-mass blocks. Numerical and experimental studies on thermal inertia of hollow envelope components have not confirmed this general assumption, even though no systematic analysis is readily available in the open literature. Yet, the usually employed methods for the calculation of unsteady heat transfer through walls are based on the hypothesis that such walls are composed of homogeneous layers. In this framework, a study of the dynamic thermal performance of insulated blocks is brought forth in the present paper. A finite-volume method is used to solve the two-dimensional equation of conduction heat transfer, using a triangular-pulse temperature excitation to analyze the heat flux response. The effects of both the type of clay and the insulating filler are investigated and discussed at length. The results obtained show that the wall front mass is not the basic independent variable, since clay and insulating filler thermal diffusivities are more important controlling parameters.

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Section: Introductionsupporting

confidence: 54%

Dynamic Thermal Features of Insulated Blocks: Actual Behavior and Myths

2017

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“…[10] Thermal insulation blocks make a non-negligible contribution to the built environments because they are considered green construction materials that achieve renewable, recyclable, and reusable materials and can be used indefinitely without negatively affecting the surrounding environment. [2] [6] [9] [12] So, this study is concerned with recognizing and analysing the capabilities of using thermal insulation blocks in building envelope construction materials to enhance whole-building performance and conserve natural, economic, and social environments.…”

Section: Introductionmentioning

confidence: 99%

Energy Efficiency Optimization in Residential Buildings Using Thermal Insulation Blocks Case Study in Cairo, Egypt

Moraekip

2023

JES. Journal of Engineering Sciences

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Thermal insulation blocks have recently been highly considered in hot weather countries -where temperature can reach high levels -according to their low thermal conductivity that can result in a considerable reduction in the demand for building HVAC systems energy and its related negative impacts to the surrounding environments. The paper concerns recognizing the capabilities of applying thermal insulation blocks in building envelopes in Cairo, Egypt to enhance whole-building performance and conserve environments. The study opted for making a comparative performance analysis on six types of building envelopes of a prototype residential building located in Cairo, Egypt by simulating the building model using building performance simulation software (Design Builder Software Ltd -V. 7.0.0.116 -Educational Version). Four use conventional bricks and blocks; the fifth type uses advanced light sand blocks. The sixth type uses thermal insulation blocks to detect the effects of using thermal insulation blocks on a building's thermal performance and energy consumption. The performance comparative analysis results referred to a huge amount of heat transfer from and to building interior spaces caused by building external walls in the conventional building envelopes that should be treated to improve building thermal performance; by using thermal insulation blocks study observes a reduction of heat transfer from 41.61% to 65.08% that results in a reduction of energy consumption from 4.27% to 13.32%. Because of the study approach, the study proves that using thermal insulation blocks in a building's envelope can enhance the building's thermal performance and thus reduce the building's energy consumption and related CO2 emissions, operating costs, environmental pollution, and other negative impacts on the surrounding environments. Therefore, researchers are encouraged to evaluate the proposed propositions further.

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“…Globally, more than 40% of the total consumption of electrical energy is utilized by the residential sector. One-third of this proportion is used for space heating and cooling in buildings [1][2][3][4]. Unfortunately, the estimated heat losses through conventional building envelopes are approximately 60% [5].…”

Section: Introductionmentioning

confidence: 99%

Effects of Metal Fasteners of Ventilated Building Facade on the Thermal Performances of Building Envelopes

et al. 2021

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Thermal bridging in the building envelope is one of the main causes of energy losses, even in high-efficiency ventilated building façades. In this study, the effects of point-thermal bridges attributed to metal fasteners on the heat transferred through different types of bricks were predicted. All the structural details of the substrate wall were included as well. This was accomplished with a multi-scale, finite element modelling approach used to enhance the thermal insulation efficiency of the building envelope. The effects of the metal fastener length, diameter, density and location were examined to elucidate any opportunity to minimize the heat losses caused by thermal bridging. The results demonstrated that increases in the lengths of fasteners yielded higher energy losses compared with those generated when the diameter increased. Additionally, metal fasteners caused higher energy losses by up to 30% when fixed on mortar, compared with the energy losses incurred when they were fixed on bricks.

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Modeling the Thermal Behavior of Egyptian Perforated Masonry Red Brick Filled with Material of Low Thermal Conductivity

Cited by 21 publications

References 13 publications

Dynamic Thermal Features of Insulated Blocks: Actual Behavior and Myths

Dynamic Thermal Features of Insulated Blocks: Actual Behavior and Myths

Energy Efficiency Optimization in Residential Buildings Using Thermal Insulation Blocks Case Study in Cairo, Egypt

Effects of Metal Fasteners of Ventilated Building Facade on the Thermal Performances of Building Envelopes

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