Studies into structural and thermal properties of building envelope materials

Gourav, K.; Balaji, Nallaval Chinnaswamy; Reddy, B. V. Venkatarama; Mani, Monto

doi:10.1016/j.egypro.2017.08.037

Cited by 11 publications

(4 citation statements)

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“…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. The coordinate system can be described in terms of wall coordinate x, time t and temperature T (x,t).…”

Section: Methodssupporting

confidence: 78%

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: 78%

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

Owczarek

2021

Energies

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“…It discusses promoting thermal comfort via the use of passive design strategies and envelope components [8]. This research investigates the association between outdoors temperature and indoor thermal comfort, taking into account the effect of building materials on comfort perception [10]. Thermal comfort is critical in houses for various reasons:…”

Section: Literature Reviewmentioning

confidence: 99%

“…Thermal properties of the building envelope play an important role in providing thermal comfort and lowering energy demand and consumption [16]. The responsiveness of the original building architecture to seasonal climate variations accounts for comfortable indoor conditions [10]. In 2018, India's Bureau of Energy Efficiency (BEE) introduced the voluntary Energy Conservation Building Code-Residential (ECBC-R), commonly known as the Eco Niwas Samhita (ENS), a collection of energy efficiency standards and guidelines [6].…”

Section: Introductionmentioning

confidence: 99%

Indicative Direction in Construction Materials for Indian Suburbs

Tyagi,

Bhyan,

Shrivastava

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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In the recent past, it is anticipated that construction materials and technologies that promote thermal comfort would become more popular. In order to safeguard potential populations from the risks of thermal stress, study attempts to include traditional construction material solutions. To meet the comfort needs of the occupants, a thorough understanding of the fundamentals of building construction and the pertinent properties of the materials used is essential. This study aims to integrate traditional and contemporary materials in residential zone, and particularly emphasis on the issue of meeting thermal comfort requirements. The study conducted a descriptive-analytical approach to analyze roofing and wall materials used in residential buildings in Uttar Pradesh, India, for thermal comfort. The study area was chosen based on the state with the highest population and the suggested building materials and construction methods in “Pahal” by the Ministry of Rural Development. The climate was analyzed using Climate Consultant® Software based on the availability of weather data files. The comparison between suggested roof and wall materials and methods was done using U value and RETV value calculations. The space RETV value, the wall and roof U-values were compared to suggest values in Eco-Niwas Samhita 2018. The study provides a comprehensive description of the area’s geography, climate, and residential structures. The results of the study can help policymakers and designers regarding the selection of appropriate roofing and wall materials for thermal comfort in residential buildings in Uttar Pradesh.

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“…While incorporated in concrete, the leaching metals which were otherwise present in fly ash were also found diminished. Gourav et al. (2017) had studied different envelop materials about their structural and thermal properties.…”

Section: Introductionmentioning

confidence: 99%

Reuse of fly ash and bottom ash in mortars with improved thermal conductivity performance for buildings

Ghosh

Neogi

2018

Heliyon

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An approach towards effective utilization of fly ash and bottom ash in the construction of energy efficient buildings has been presented in this paper. Two masonry mortar grades MM3 and MM5 were considered for trial mix. Portland pozzolana cement with substitution of sand by fly ash and bottom ash separately in different substitution ratios (SR) were adopted for preparation of test samples. Fly ash and bottom ash with lime dust and marble dust combinations were also tested as sand free mortars. 28 days compressive strength, apparent porosity, bulk density and thermal conductivity parameters were evaluated for all such samples. By analysing the test results, it was observed that all the SR combinations satisfied the minimum masonry mortar grade MM0.7, as per IS 2250. Both the MM3 and MM5 grade mortars could be produced at 60% SR by fly ash, and corresponding reductions in thermal conductivity values were 69%, and 54% respectively, while compared with conventional mortar. Sand less mortar for both the grades resulted around 57% reductions in corresponding thermal conductivity values. Overall heat transfer co-efficient (U-value) for both side plastered and rendered brick masonry wall panel was found to be reduced by 15.58%, while comparison made between conventional mix of MM5 grade and corresponding 50% fly ash substituted mix. Thus such ash blended mortar mix appears to be advantageous in building envelop application for lowering the overall cooling/heating demand of building, besides utilizing the coal ash up to largest extent and saving natural mineral sand from depletion.

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Studies into structural and thermal properties of building envelope materials

Cited by 11 publications

References 1 publication

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

Indicative Direction in Construction Materials for Indian Suburbs

Reuse of fly ash and bottom ash in mortars with improved thermal conductivity performance for buildings

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