No abstract

No abstract

A light pipe prototype with a concentrating mirror parabolic head was tested for temperature profiles. The purpose of the testing was to find maximal temperature and estimate potential problems for overheating in the position of the pipe installation into roof structures. Infrared thermography monitoring of the light pipe prototype and temperature measurements give overview about the light pipe system temperature distribution. It was proven that the light pipe head temperature was increased for more than 100°C in thermally insulated structure under intensive infrared radiation.

Paper deals with theoretical electricity storage possibilities. Theoretic electricity storage system is integrated into system of small photovoltaic power plant (32 m²). Panels are located in the roof of the passive house. Paper shows time distribution of energy flows (PV produce, house energy consumption, storage systém energy coverage etc.) during the days and during the years. Paper shows photovoltaic panel geometry influence on fluctuating of electricity produce and whole this system during the year. Paper closes the discussion about suitability of such electricity storage system for Central Europe region.

Energy savings led to design requirements for buildings with thermally insulated envelopes. Window glazing with better thermal insulation properties have in many cases reduced transmittance of solar radiation. They decrease solar thermal gains and daylight level in buildings. A study of influence of selected windows on solar gains and daylighting in a reference room is presented in the paper.

Fire safety is an important feature of healthy internal environment. If a fire breaks out, the interior of fire compartments within the building is exposed to very high temperatures and further phenomena accompanying the burning process. All of them impact the boundaries of the compartment structures, including the structures that are located inside them. Some structures serve the load bearing function hand in hand with fire barriers, some are only fire barriers. As to the dramatic increase of temperature, its impact upon the opposite surface of the fire separating structure should be considered, in particular regarding the behavior of the load bearing elements and their stability. This is topical at the present day, since the conventional construction materials are seen to give way to wooden sandwich structures that are preferred especially for their thermal insulation properties, low weight, small thickness and speediness of construction. The article uses dynamic simulation to illustrate how these modern structures react to high temperatures within specific time intervals, offering comparisons with traditional brick structures.

This paper presents simulation results of summer overheating of passive house in Dubňany - Czech Republic. The simulation was performed using the quasistationary method in the program SIMULACE and the dynamic method in the program BSim. Outputs from both programs are then compared. Since the simulation was performed on three structural variants, two timber houses and one brick house, the article also deals with different results from program BSim between these three structual systems.

Protected escape routes enable the rescuing of persons to the outside of a building on fire. They are characterized, in particular, by strict requirements relating to the aeration of such spaces. However, the fulfilling of these limits may impact the monitored thermal characteristics of the respective internal areas. The outlined dilemma will be illustrated by way of an example of a protected escape route aerated by positive-pressure ventilation.