Jan Pěnčík

Development of Thermal Insulation Composite Material from Recycled Polymer and Recycled Glass

With the sustainable construction the emphasis is placed on saving energy, reducing of consumption of natural resources, extending the life cycle of recycling, etc. One of the important groups of waste materials that can be reused are waste polymers. These materials are used in the design of thermal insulation composite material. The crucial property of materials used for thermal insulation is the coefficient of thermal conductivity. Thermal conductivity coefficients of waste polymers however do not meet the requirements. For this reason, waste polymers are within the development of thermal insulation composite material combined with filler with a low coefficient of thermal conductivity. In developing of this composite material the developers combine a method of theoretically optimized software design of blends with their production and experimental verification. Possibility of application of thermal insulation composite material can be seen especially in the structural details, in which it is necessary to eliminate the thermal bridges, but also details where the requirements are applied to the mechanical resistance and static load bearing capacity.

Elimination of Thermal Bridge by Thermal Insulation Composite Material

With the sustainable construction the emphasis is placed on energy savings, reducing of consumption of natural resources, extending of the life cycle of recycling, etc. The research has brought about a new material - thermal insulation composite material - which is formed by a combination of recycled polymers and inorganic fillers satisfying the condition of recyclability. Using this material in the solution to eliminate thermal bridge at the wall foot can reduce heat loss of the building.

Environmental Assessment of Production of Thermal Insulation Block from Secondary Raw Materials

The aim of the research carried out under the grant FAST-J-12-1773 is the optimization of the proposed mass production of newly developed thermal insulation composite material in terms of its impact on the environment without causing a disproportionate increase in costs. This paper presents current results of research - life cycle assessment (LCA) of the production of thermal insulation block made of composite plastic. LCA methodology that was used for this assessment is contained in international standards ISO 14040 and ISO 14044.

Thermal and Static Analysis of an Insulation Block from Recycled Polymer HDPE for Solution of Thermal Bridges in Wall-Footing Detail

With the sustainable construction the emphasis is placed on saving energy, reducing of consumption of natural resources, extending the life cycle of recycling, etc. One of the important groups of materials that can be reused are polymers. Polymers and waste polymers can be used as a base material for products used in civil engineering. One of these products, which were developed, is an insulation block from modified recycled polymer HDPE for direct solution of thermal bridges in wall footing detail. Design of the insulation block has been done using the MAP method together with long-time experimental testing of specimens and in a testing wall in scale 1:1. In the mathematic modeling the installation block was assessed in terms of statics and thermal technology. Static assessment was performed using Standard Solid rheological model, which represents the most accurate approximation of long-time behaviour.

FEA Analysis and Monitoring of Long-Term Behavior of an Insulation Block from Recycled Polymer HDPE

Use of waste materials is an actual topic that corresponds to current trends associated with the decreasing of power exigency and sustainable development. The possibility to reduce depletion of natural resources and decrease the produced waste lies in an efficient and possibly repeated use of resources. An important subgroup of waste is formed by materials from petroleum derivatives - polymers (PP, PE, HDPE etc.). Polymers and their composite materials can be used as a base material for most products including products used in civil engineering. One of these products is an insulation block for elimination of thermal bridges in wall footing. During design of this product the MAP method (modelling-analysis-prediction) has been used together with experimental testing. This paper deals with the description of long term behaviour of an insulation block made of recycled polymers using full scale testing. Experimental data is compared to different rheological models.

Experimental Assessment of the Influence of Outlet Geometry on the Airflow and Temperatures in the Ventilated Façade Cavity

Ventilated façades help to protect buildings against overheating during the summer seasons. The efficiency of this function depends on many factors. The geometry of inlet and outlet openings may be the significant factor of the ventilated façade function. This study presents the experimental assessment of the outlet geometry influence on the temperatures and airflow in the open joint ventilated façade. Two sections with different outlet geometry are compared in the same time. Different types of outlet geometry are based on various window sill dimensions and various cross section dimensions between cladding and window sill. The cavity temperature and airflow differences are assessed during the direct insolation of façade sections. Results show that the effect of outlet opening area is much more significant than the assessed outlet geometry types.

Influence of Structural Design of Balcony Panels on the Course and the Size of Thermal Bridges

This paper is focused on the static and thermal protection issues of the balcony panels design. The projecting part of the balcony panel, which is from a static point of view an overhanging end of a simply supported beam, is exposed to the direct effects of climate variations. Insulation of projecting part of the balcony panel is simple, but rarely applicable in practice, mainly due to a thickness of this cantilever structure with thermal insulation and balcony floor structure and therefore difficult height arrangement at the entrance to the balcony and problematic realization of the facade. Therefore, thermal insulation is usually placed at the edge of a single-leaf masonry or in the place of thermal insulation, which is place of the biggest static loading on the overhanging part of balcony panel. Possible solutions of contradictory requirements of statics and thermal protection and the impact of structural design on the course and the size of thermal bridges in the building envelope are shown on the analysis of balcony panels.

Analysis of Thermal – Moisture Problems in Massive Wooden Sandwich Structures

This article focuses on hygrothermal problems in massive wooden sandwich structures. Wood in sandwich structures is already artificially dried before processing, and therefore does not further shrink, as it does in the case of log cabins. Analysed sandwich structure is composed from three layers, and is formed of wooden beam in interior side, thermal insulation and wooden beam in the exterior side. The composition of analysed structure is considered in different thickness with respect to the required heat transfer coefficient. Massive wooden beam on the exterior side causes troubles which exhibits in the reducing capacity of diffusion of water vapor. It is therefore possible that water vapor condenses on the interface of wood and the thermal insulation under certain boundary conditions. Therefore, it is appropriate to place massive wooden beam closest to the interior side. This solution would improve the balance of the diffusion permeability to water vapor permeating from the interior side to the exterior side.

Design and Numerical Modelling of Prefabricated Roller Blind Lintels

The prefabricated roller blind lintels have become common solution, particularly for the single-leaf masonry structures without external thermal insulation system. These lintels, representing simple system solution, are designed to interrupt thermal bridges in a place of above the window lintel and simultaneously to provide sufficient reliability of load transfer. The actual outdoor blinds contribute to increase the thermal stability in the room in summer and winter season. They prevent overheating of the room in the summer months and reduce heat transmission through a window in the winter. This paper is focused on the design and numerical modelling of the prefabricated roller blind carrier lintels solutions. Methods of elimination of the thermal bridge are demonstrated on the example of a real produced prefabricated lintel. At the same time this paper deals with its structural analysis. Analyses were carried out using the method of numerical modelling, using finite element method and computing software ANSYS.

Analysis of Unreinforced Ceramic Wall Panels in the Mounting State

Properties of building materials used for the construction of surrounding structures significantly contribute to creating a healthy and comfortable microclimate inside the rooms. Ceramics belong among materials which exhibit very suitable properties for the formation of the healthy environment. It is also one of the reasons that the fired clay structures remain popular among builders and that recovery of ceramic prefabrication can be seen in the Czech Republic. The important step towards rediscovering the benefits of the prefabricated ceramic elements is forthcoming production of unreinforced ceramic wall panels made of fired clay masonry units with tongue and groove, connected in the bed joints by two-component adhesives. Conventional analytical model for vertical loads is used in the operating state. However, in the transport and mounting state it is a structure stressed by bending in its own plane. This paper is focused on the issue of load-bearing capacity of structures with masonry units cross-sections that are not filled in head joints and therefore are unable to transfer either tensile or compressive stresses. On the segment of the wall panel is performed numerical model analysis using the finite element method in the computing program ANSYS and comparison of this analysis results with the results of the experimental tests.