Dušan Katunský

Numerical Analysis and Measurement Results of a Window Sill

Window sill of brick walls is one of the most critical places in a connection of two envelope types objectively. If there are the transparent and opaque parts present together, the connection is much more complicated. Different behavior of the construction materials in dynamic boundary conditions causes deformations of thermal field of the window sill detail. Numerical thermal field analysis verified by the experimental measurement in experimental outdoor chambers is used for recognize the real heat-air-moisture behavior in the various constructions.

Measuring Methodology and Results of Heat-Air-Moisture Performances at Building Envelope Levels

The contribution is focused on the design, selection and implementation of methodologies for monitoring the heat-air-moisture performances at building envelope levels in the experimental chambers. The chambers are located in the outdoor environment - installed samples of building fabrics are exposed to dynamic boundary conditions. Indoors consists of a constantly maintained air temperature and relative humidity - a quasi-stationary state. The chosen methodology determines the purposes of data evaluation and it is a tool for controlling the scientific, theoretical and practical results and conclusions of measurements in real outdoor conditions. The results obtained at an early stage suggest differences of material properties at building envelope levels.

Numerical and experimental determination of in-structure temperature profiles

Abstract When building physics simulations are done initial conditions express the actual hygrothermal state of building envelope. For the temperature field simulations initial condition is represented by the initial temperature in the body profile at the start of heat transfer. In-structure temperature varies quickly so temperature initial conditions are often neglected. Nevertheless in specific cases initial conditions have to be taken into an account even when simple temperature field simulations are done. The contribution shows various temperature initial conditions determination for insulated construction of outdoor test cell. Comparison of measured and calculated temperature profiles in structure shows correctness of start-up pre-calculation initial condition consideration

Temperature Stratification of Underfloor and Ceiling Based Air Heating Distribution System in an Experimental Room

Abstract Most of air heating and ventilating systems for passive houses inlet air in floors. It is assumed that a natural motion of air is led upwards, and so the right stratification of temperature in the space is ensured. However, in the case of excellently insulated buildings it is possible to assume that an upper inlet of air is also able to ensure the required layering of temperature. Within the experiment an influence of upper and down air inlet for temperature stratification in the space was followed. Night sensors of indoor air temperature are placed for measurement purposes. Measurements are done in the long term. The results from measurements show that both, vertical and horizontal stratification of temperature in rooms of passive houses are equal regardless of the fact, which system of air inlet is used.

Embodied Energy of Stabilized Rammed Earth

The paper references a number of sources to create a compact account of the intrinsic energy, physical parameters and subsequent thermal potential of rammed earth that has been stabilized with Portland cement. The aim of this article is to show that a lower embodied energy does not necessarily reduce thermal comfort if careful consideration is given to design.

Analysis of an Indoor Environment in Year-Round Operation

Implementation of energy efficient buildings is one way to meet the requirements of the European Parliament, which has adopted the agreement 20/20/20. Given the low percentage of the amount of energy efficient buildings in the climatic conditions of the Slovak Republic is a little knowledge of their real operation. The paper describes the experimental measurement of the physical quantities in energy-efficient building is selected in the climatic conditions of the SR in the introduction of the contribution is a description of an experimental building, in which the measurement was done, the description and the deployment of measuring instruments. The conclusion of this paper is devoted to processing and statistical analysis of measured physical quantities. The analysis results show that the internal state of residential houses is largely influenced by home users.

Lighting Quality of Indoor Environment in Large Floor Buildings in Light Industry

The paper highlights the problems associated with the application of daylight and integral lighting in industrial facilities. In the case study of a multi-storey textile plant, we show how combined lighting (daylight and integral illumination) can be evaluated in production halls labelled F and G. These halls have large areas 54 × 54 metres, and are more than 5 meters high. There is daylight only on side through connected windows in a vertical position. In this paper we want to present case studies of these two production halls in the textile factory located in Kosice (Slovakia). These are halls that are lit through by daylight from two sides through external walls that are opposite or next to each other. The results of the case studies can be applied in similar production halls illuminated by a “bilateral”—a double-side daylight system and natural illumination through windows on two sides in a vertical position. Such a situation is typical of multi-storey buildings in light industry. The proposed approach of daylight factor calculation can also be applied to floor space in other similar buildings.

Energy Consumption for Heating Considering Interior and Exterior Conditions in Production Buildings

This article describes some microclimate parameters in chosen production building and their influence on the whole energy consumption for heating in winter period. The article presents the monitoring of physical aspects of chosen hall object, which is in poor technical condition. The content of this contribution is the comparison of energy saving according to indoor conditions in selected industrial object in the present state. The article deals with hygrothermal parameter analysis in industrial production building, considering the effects on energy consumption for heating.

External Climatic Conditions and Thermal–Humidity Internal Parameters Changes in Working Environment of Production Building

The article describes measurement results of external climate conditions and their influence on internal environment in selected production building in winter period. The content of this contribution is the comparison of external climatic conditions measured during one mounth to internal thermo-humidity parameters. There is comparison between external conditions in chosen 7 days (one week) to indoor conditions in selected one production object in the same time. It can be also comparison between thermo-humidity parameter analyses in industrial production building, considering the effects on energy consumption for heating.

Problems in the Designing of Acoustic Properties of Musical Rehearsals

Content of the post is to describe the creation of building structures, typology, internal environment, and internal wall coverings music rehearsal for optimal acoustic performance. One of the aspects of its internal environment is reverberation time. For this variable there are several methods of calculation. Article gives an indication of how the music was the laboratory building in the center of the music created and what problems the authors in its proposal met. Article contents and solving spatial and building acoustics model music musical rehearsal building downtown. Calculation fully respects Slovak standards valid for the design of room acoustics, as well as hygiene regulations on noise pollution. Acoustically treated room should serve as a laboratory for musical performance. If the building is more proof is needed to solve the sound insulation (building acoustics) that these areas do not interfere with each other. In addressing acoustics of testing can’t talk about bad or good acoustics, but rather on the season and out of corresponding with room acoustics, respectively, with activities in it.