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Diffusion-Open and Diffusion-Tight Internal Insulation Systems
Sukop, Lukáš ; Ostrý, Milan
The current energy performance requirements extend beyond new buildings, including existing and historic buildings. Improving the thermal performance of buildings is an important factor for energy consumption reduction. Usually, an external insulation system is used in order to enhance thermal performance. This method of insulation is preferred as the safest. For listed buildings, this method of insulation is often not feasible due to legislative constraints. In such cases, internal insulation becomes an alternative, despite the number of risks it poses. New so-called capillary-active materials are currently being developed. This article is focused on the principle of diffusely open and diffusely closed internal insulation systems.
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Optimizing the design of modern low-energy wooden houses
Vahalová, Eva ; Ostrý, Milan (referee) ; Doc.Ing. Miloslav Bagoňa, Ph.D (referee) ; Šuhajda, Karel (advisor)
The main aim of the thesis was focused on hygrothermal simulation of critical details of two prefabricated wooden buildings - especially connections of the perimeter wall to monolithic foundations, respectively with waterproofing layer. The composition of the external walls of these selected buildings has quite different compositions and thus different potentials of drying integrated moisture from the components. Practical measurement of moisture weight-content was applied to the wooden bottom plate, which is in direct contact with the concrete slab structures. The influence of different design solutions on hygrothermal characteristics of the wooden plate was examined with regards to the risk of mould growth, analysis of mass loss due to the decay fungi and with the aim to estimate the durability of the studied details of prefabricated wooden houses. The subsequent research focused on the differences in physical and mechanical properties of natural spruce wood (Untreated, (-), A) and impregnated spruce (Treated, (+), B) using supercritical CO2 and its possible impact on wood protection for mould growth. Samples of identical Untreated and Treated spruce were collected in the laboratory and subjected to thermal and hygrothermal experiments. The comparison of the resulting values of the individual experiments is presented. Required values needed for numerical calculations were obtained from these experiments. In conclusion, the summary of founded comparison is presented. The mould growth analysis and its influence on the durability of wooden structures offer a view of the behaviour of the structures. Relevant findings and recommendations for the future praxis are mentioned.
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Optimizing the design of modern low-energy wooden houses
Vahalová, Eva ; Ostrý, Milan (referee) ; Doc.Ing. Miloslav Bagoňa, Ph.D (referee) ; Šuhajda, Karel (advisor)
The main aim of the thesis was focused on hygrothermal simulation of critical details of two prefabricated wooden buildings - especially connections of the perimeter wall to monolithic foundations, respectively with waterproofing layer. The composition of the external walls of these selected buildings has quite different compositions and thus different potentials of drying integrated moisture from the components. Practical measurement of moisture weight-content was applied to the wooden bottom plate, which is in direct contact with the concrete slab structures. The influence of different design solutions on hygrothermal characteristics of the wooden plate was examined with regards to the risk of mould growth, analysis of mass loss due to the decay fungi and with the aim to estimate the durability of the studied details of prefabricated wooden houses. The subsequent research focused on the differences in physical and mechanical properties of natural spruce wood (Untreated, (-), A) and impregnated spruce (Treated, (+), B) using supercritical CO2 and its possible impact on wood protection for mould growth. Samples of identical Untreated and Treated spruce were collected in the laboratory and subjected to thermal and hygrothermal experiments. The comparison of the resulting values of the individual experiments is presented. Required values needed for numerical calculations were obtained from these experiments. In conclusion, the summary of founded comparison is presented. The mould growth analysis and its influence on the durability of wooden structures offer a view of the behaviour of the structures. Relevant findings and recommendations for the future praxis are mentioned.
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