Rastislav Ingeli

Thermal Bridges Minimizing through Window Jamb in Low Energy Buildings

Building envelopes with high thermal resistance are typical for low-energy buildings. Detailed specification and calculation of each thermal bridge in these buildings should be taken into account. This paper is focused on thermal bridges minimizing through typical window systems in building envelopes. The aim of this article is to analyze the window position influence, as regards on thermal performance and to point out the installation modality in accordance with the characterization of the windows performance. This can be done by quantifying the percentage increment of the window jamb thermal transmittance. The calculated results also demonstrate that there is significant difference between results obtained by various available calculation approaches. This can be significant especially in buildings with high thermal protection.

Analysis of Energy Consumption in Building with NZEB Concept

The trend in the components of residential buildings is low energy demand buildings in relation to the minimum costs spent by users for their operation. The main aim of their construction is to improve the energy economy of buildings, to reduce the environmental load in energy consumption, to improve the quality of the interior, to ensure the minimum cost level in the operation of buildings and their maintenance in the life cycle. The consequence of increased energy prices and the possible implementation of tax policies in the countries of Europe is more frequently designing and implementing energy self-contained buildings. This means that energy necessary for the general use of a building can be produced in it to certain extent. The concept of such buildings is not only in high quality heat insulating properties, but also in suitable installed devices utilizing alternative sources. The objective indicator of saving and proof of the required level of a building is an analysis of its real energy consumption. The paper analyzes the energy consumption in a specific house which, in the design phase, met the criteria for designing a nearly zero energy building. The analyzed building has a high thermal protection and uses photovoltaic energy as an alternative source. The main aim is to evaluate the concept of the designed nearly zero energy building and to assess it in relation to the really consumed energy.

The Effect of Thermal Bridges on Energy Balance of Wood Frame Houses

In compliance with the today’s trend of designing sustainable and energy-saving architecture, it is necessary to firstly solve the factors influencing the energy balance. In this respect, the thermal bridges in buildings constitute a crucial factor. In case of their occurrence, the use of construction and insulation building materials is significant for finding the solution. The aim of this paper is to analyse the thermal bridges in buildings constructed on the basis of light constructions. The subject of analysis was an implemented wood frame house with common sandwich construction, designed in a low-energy standard. The house analysis is divided in theoretical and experimental part. The house in question has been directly exposed to dynamic boundary conditions. In order to analyse the thermal bridges, critical details have been selected methodically, verified by thermography. The experimental and theoretical results were compared by the simulation method for calculating critical surface temperatures. Both the measurements and results show how attention shall be paid to this issue at the project stage already. With increasing demands for overall energy balance of buildings, it is necessary to exactly define the critical details and consider the thermal bridges in the project documentation already.

Thermal Bridges Minimizing through Typical Details in Low Energy Designing

Energy demand reduction in buildings is an important measure to achieve climate change mitigation. It is essential to minimize heat losses in designing phase in accordance of building energy efficiency. For building energy efficiency in a mild climate zone, a large part of the heating demand is caused by transmission losses through the building envelope. Building envelopes with high thermal resistance are typical for low-energy buildings in general. In this sense thermal bridges impact increases by using of greater thickness of thermal insulation. This paper is focused on thermal bridges minimizing through typical system details in buildings. The impact of thermal bridges was studied by comparative calculations for a case study of building with different amounts of thermal insulation. The calculated results represent a percentage distribution of heat loss through typical building components in correlation of various thicknesses of their thermal insulations.

Balcony Systems (Isokorb) Impact on Energy Need for Heating and Economic Valuation

Rising living standards have led to a significant increase in building energy consumption over the past few decades. Therefore, along with sustainability requirements, it is essential to establish an effective and precise energy demand model for new buildings. In principle, energy demand in buildings is very important plan to pre-calculate and that is one of the reasons why it is supposed to be precalculated for most of the sustainable buildings. Net Zero-Energy Buildings (NZEBs) have received increased attention in recent years as a result of constant concerns about energy supply constraints, decreasing energy resources, increasing energy costs and the rising impact of greenhouse gases on world climate. Promoting whole building strategies that employ passive measures together with energy efficient systems and technologies using renewable energy became a European political strategy following the publication of the Energy Performance of Buildings Directive recast in May 2010 by the European Parliament and Council. In Net Zero-Energy Buildings (NZEB) is necessary to calculate all factors that influence on energy need for heating. However what is still underestimated is the consideration that the energy performance of any building component is the result not only of its thermophysical properties but also of how are all the components installed and connected to each other. Thermal bridging in buildings can contribute to a multitude of problems. One of the details that create thermal bridges is balcony. This paper is focused to calculate Balcony systems (isokorb) impact on energy need for heating and economic valuation of balcony systems in residential building.

Adaptation of the Ruin of Outbuilding next to Classicist Manor-House in Opatová - Lučenec

Is it possible to live in a ruin while meeting the contemporary construction and engineering requirements for the interior and preserving its authenticity at the same time The ruin of outbuilding is located in a protected area of the classicist manor-house from the second half of the 19th century. In order to sustain the continuity of the character of such historical environment, the goal was to preserve its appearance as much as possible. The proposed adaptation of the outbuilding ruin for residential usage applies an experimental concept of reconstruction using progressive and renewable building materials and technological procedures. In this contribution, we deal with the designed reconstruction of the building while preserving authenticity and considering the energy requirements applicable in our legislation. Under the current marginal conditions, it is not only the energy needs for the heating season that need to be solved. The project shall be considered comprehensively, i.e. including the energy needed for cooling. The submitted building concept calculates with energy for both the heating and cooling season. The question is whether or not it is possible to design the NZEB concept for the reconstructed building observing the contemporary construction and engineering requirements for the interior while preserving its authenticity

Thermal Bridges Impact on Energy Need for Heating in Low Energy Wooden House

Energy need for heating is depend on the heat loss of the builing. It is essential to minimize heat losses when designing and building energy efficient buildings. For an energy-efficient building in a cold climate, a large part of the space heating demand is caused by transmission losses through the building envelope. The low-energy buildings are enevelope construction with high thermal resistance. The impact of thermal bridges was studied by comparative calculations for a case study building with different amounts of insulation. In the low-energy buildings are envelope construction with high thermal resistance. When more insulation is used the relative impact of thermal bridges increases. In these buildings is necessary to specify each thermal bridges. This thesis deals with the influence of thermal bridges on energy need for heating in low energy wooden houses.

Comparison of Thermal Bridges Calculate Method through Typical Details in Low Energy Designing

There are several studies that have investigated transmission heat transfer losses, through building envelopes including thermal bridges. Most of the studies investigate the effect of different calculation and simulation methodologies, such as static/dynamic and 1D/2D/3D. It is essential to minimize heat losses in designing phase in accordance of building energy efficiency. Building envelopes with high thermal resistance are generally typical for low-energy buildings. In this sense thermal bridges impact increases by using of greater thickness of thermal insulation. s mentioned earlier, different measuring methods may be used to quantify building elements. This paper is focused on comparison of thermal bridges calculate method through typical systems details in buildings. The impact of thermal bridges was studied by comparative calculations for a case study of building with different amounts of thermal insulation. The calculated results represent a percentage distribution of heat loss through typical building components in correlation of various thicknesses of their thermal insulations.