Experimental Verification of Thermal Insulation in Timber Framed Walls

Michálková, Daniela; Ďurica, Pavol

doi:10.3390/ma15062040

Cited by 7 publications

(7 citation statements)

References 19 publications

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“…The green roof also protects the membrane against UV radiation. There is also time shift in the temperature peaks, which is not such significant nowadays with highly insulated structures [25][26][27]. The temperature course for the G membrane is supported by the other findings [12,13].…”

Section: In-situ Temperature Measurementsupporting

confidence: 61%

Increasing thermal protection with use of green roof

Juráš¹

2022

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The use of green roof is a great choice in case of climate change mitigation and reduction of urban heat islands. Positive aspects of green roofs during winter or the whole year round balance are often overlooked. The surface of highly insulated flat roof is overcooled during the night by the long wave sky radiation. This radiative cooling increases the thermal losses that are reduced by the existence of additional layers. The green roof composition layers also have their thermal resistance, which is not usually included within the calculation of thermal resistance using the EN ISO 6946. The presence of snow on the roof can also increase the resistance. This paper analyzes the measurement results of various experimental green roof fragments in Central Europe.

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Section: In-situ Temperature Measurementsupporting

confidence: 61%

Increasing thermal protection with use of green roof

Juráš¹

2022

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“…However, a frame filled with sheep wool did not reveal an accumulated moisture problem. The insulations made of glass or basalt wool were almost dry [1]. Georgescu et al investigated frame wall elements filled with reed straw.…”

Section: Introductionmentioning

confidence: 99%

Moisture Transport in Loose Fibrous Insulations under Steady-State Boundary Conditions

Kosiński

2023

Materials

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This research aimed to compare the transport capacity of loose-fill mineral wool, cellulose fibers, and wood wool to transfer moisture under steady-state conditions. The tests were carried out in the heat flow meter apparatus, which created a constant thermal field, limiting samples of sorptive moistened materials. The thermal conductivity, stabilization time, and moisture content of the samples were measured. Based on the variation in the results, the dynamism of moisture transport in the materials was determined. Mineral wool samples showed the lowest sorption. As a result, the moisture transport in this material stopped the fastest. In the case of cellulose and wood fibers, moisture transport continued throughout the whole test procedure. It was noted that the amount of moisture transport is influenced primarily by the structure of the fibers, the moisture content, and the possible presence of air in the pores. The wetter the material, the faster the transport. The dynamism of moisture transport according to trends of thermal conductivity changes over time was analyzed. The greater the slope of the linear regression line, the greater the dynamics of change. The smallest dynamics of change were found for mineral wool, for which the measured slope was between −0.008 and −0.033. For cellulose and wood wool, the range of slope was from −0.141 to −0.210, and from −0.162 to −0.211, respectively. The results of this research may provide the basis for further work on buffering moisture in the adjacent internal layers of the frame walls.

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“…A way out may be found in creating a calculational model that considers all the parameters and can perform calculations automatically. In turn, Daniela Michálková and Pavol Ďurica investigated 10 experimental wall structures that have been exposed to natural external boundary conditions since 2015 18 . They detected several issues, including defects caused by inappropriate realization, causing local moisture to increase.…”

Section: Introductionmentioning

confidence: 99%

“…In turn, Daniela Michálková and Pavol Ďurica investigated 10 experimental wall structures that have been exposed to natural external boundary conditions since 2015. 18 They detected several issues, including defects caused by inappropriate realization, causing local moisture to increase. Material settlement in loose-fill thermal insulation was another issue.…”

Section: Introductionmentioning

confidence: 99%

Comparison of experimental and calculated thermal transmittance for timber‐framed outer wall constructions

Gendelis

2023

Heat Trans

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The importance of accurately determining the thermal transmittance factor for the outer walls of timber‐framed buildings is the driving force behind this research. This calculation is necessary for heating and cooling load determination, as well as energy consumption assessment. This research aims to conduct an analytical comparison, through both experimental and calculated means, of thermal conductivity coefficients of materials employed in the construction of buildings and structures. The methodological approach adopted in this research is grounded on an experimental analysis of the thermal transmittance of the outer wall materials in timber‐framed buildings. Thermal conductivity measurements with a Hot Plate apparatus by ISO 8302 and thermal conductivity calculations using mathematical software were the primary experimental methods deployed during the research. The results of this study demonstrate differences between experimental and calculated thermal transmittance values for timber‐framed outer walls. Moisture inconsistent distribution throughout the material is the reason behind these discrepancies, calling for particular humidity corrections in the calculations, varying across different materials. While working with simplified calculations of timber‐framed outer wall structures, monitoring the uneven heat flow in I‐beam joints is paramount and should be coupled with humidity‐related material changes. This study's practical implications are that the results can be implemented when calculating the energy consumption of building structures and the heating‐cooling load they entail.

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Experimental Verification of Thermal Insulation in Timber Framed Walls

Cited by 7 publications

References 19 publications

Increasing thermal protection with use of green roof

Increasing thermal protection with use of green roof

Moisture Transport in Loose Fibrous Insulations under Steady-State Boundary Conditions

Comparison of experimental and calculated thermal transmittance for timber‐framed outer wall constructions

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