Experimental determination of thermal properties of brick wall for existing construction in the north of France

Sassine, Emilio; Younsi, Zohir; Chérif, Y.; Chauchois, Alexis; Antczak, Emmanuel

doi:10.1016/j.jobe.2017.09.007

Cited by 20 publications

(10 citation statements)

References 26 publications

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“…The obtained parameter values correspond to medium weight clay brick [22], however, a significantly higher thermal conductivity coefficient was recorded. A similar value of the coefficient was recorded in [23] by making measurements for the entire wall, both bricks and binder (mortar). Dry and saturated state brick parameters were measured in [24], the average value of these results corresponds to the value obtained in this study.…”

Section: Methodssupporting

confidence: 64%

Thermal Fluxes and Solar Energy Storage in a Massive Brick Wall in Natural Conditions

Owczarek

2021

Energies

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The thermal state of building elements is a combination of steady and transient states. Changes in temperature and energy streams in the wall of the building in the transient state are particularly intense in its outer layer. The factors causing them are solar radiation, ambient temperature and long-wave radiation. Due to the greater variability of these factors during the summer, the importance of the transient state increases at this time. The study analysed heat transfer in three aspects, temperatures in the outer, middle and inner parts of the wall, heat fluxes between these layers and absorption of solar energy, heat transfer coefficient on the wall exterior was also calculated. The analysis is based on temperature measurements at several depths in the wall and measurements of solar radiation. The subject of research is a solid brick wall. The results show that the characteristics of heat flow in winter and summer for the local climate show distinct differences. In the winter, the maximum temperature difference between the external and internal surface of the wall was 10 °C and in summer, 20 °C. In the winter, the negative flux on the internal surface reached 10 W/m2 and on the external 40 W/m2 and was constant throughout the day. The mean heat transfer coefficient on the exterior surface for winter week was 8 W/(mK). A Nusselt and Biot number for dimensionless convection analysis was calculated. The research contributes to the calculation of the variability of heat or cold demand in a daily period and to learn about the processes of energy storage in the wall using sensible heat.

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Section: Methodssupporting

confidence: 64%

Thermal Fluxes and Solar Energy Storage in a Massive Brick Wall in Natural Conditions

Owczarek

2021

Energies

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“…Studies have already been carried out on this type of construction. [54,55]. This type of house has low insulation and in some cases no insulation.…”

Section: Study and Analysis Of A Detached Housementioning

confidence: 99%

Impact of green walls occultation on energy balance: Development of a TRNSYS model on a brick masonry house

Kenai¹,

Libessart²,

Lassue³

et al. 2021

Journal of Building Engineering

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“…Therefore, the literature review shows that the calibrated hot box is the most used [3,4,6,13,17,19,20,[23][24][25][26]28,30,32,33,36,37] followed by the guarded hot box [5,7,14,15,18,21,22,29,31,34,35] and the simple hot box [16,27,38]. The measuring systems always employ analog probes and the thermocouples are more widely used [3][4][5][6][13][14][15][16]18,[21][22][23][24][25][26][27]29,31,[33][34]…”

Section: Common Systems and Literature Backgroundmentioning

confidence: 99%

“…The measuring systems always employ analog probes and the thermocouples are more widely used [3][4][5][6][13][14][15][16]18,[21][22][23][24][25][26][27]29,31,[33][34][35][36][37][38] with respect to the thermoresistances [17,19,20,28,34]. The number of probes installed that, as mentioned, depends on the size of the hot box, is very variable: some cases have less than 20 probes [13,16,19,20,27,28,38], most cases have a number of probes between 20 and 100 [4][5][6]14,15,[23][24][25]33,36], while in three cases there are more than 100 probes [34,35,...…”

Section: Common Systems and Literature Backgroundmentioning

confidence: 99%

“…The number of probes installed that, as mentioned, depends on the size of the hot box, is very variable: some cases have less than 20 probes [13,16,19,20,27,28,38], most cases have a number of probes between 20 and 100 [4][5][6]14,15,[23][24][25]33,36], while in three cases there are more than 100 probes [34,35,37]. The measuring and control systems are mainly commercial [3,6,7,16,[19][20][21][23][24][25]27,28,31,33,37] except for one customized system [17].…”

Section: Common Systems and Literature Backgroundmentioning

confidence: 99%

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Integrated Measuring and Control System for Thermal Analysis of Buildings Components in Hot Box Experiments

et al. 2019

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In this paper, a novel integrated measuring and control system for hot box experiments is presented. The system, based on a general-purpose microcontroller and on a wireless sensors network, is able to fully control the thermal phenomena inside the chambers, as well as the heat flux that involves the specimen wall. Thanks to the continuous measurements of air and surfaces temperatures and energy input into the hot chamber, the thermal behavior of each hot box component is analyzed. A specific algorithm allows the post-process of the measured data for evaluating the specimen wall thermal quantities and for creating 2D and 3D thermal models of each component. The system reliability is tested on a real case represented by a double insulating X-lam wall. The results of the 72 h experiment show the system’s capability to maintain stable temperature set points inside the chambers and to log the temperatures measured by the 135 probes, allowing to know both the U-value of the sample (equal to 0.216 ± 0.01 W/m2K) and the thermal models of all the hot box components. The U-value obtained via hot box method has been compared with the values gathered through theoretical calculation and heat flow meter measurements, showing differences of less than 20%. Finally, thanks to the data postprocessing, the 2D and 3D thermal models of the specimen wall and of the chambers have been recreated.

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Experimental determination of thermal properties of brick wall for existing construction in the north of France

Cited by 20 publications

References 26 publications

Thermal Fluxes and Solar Energy Storage in a Massive Brick Wall in Natural Conditions

Thermal Fluxes and Solar Energy Storage in a Massive Brick Wall in Natural Conditions

Impact of green walls occultation on energy balance: Development of a TRNSYS model on a brick masonry house

Integrated Measuring and Control System for Thermal Analysis of Buildings Components in Hot Box Experiments

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