Issue 5/2004

The contribution continues the article of the same author [1] where the fire-fighting protection of piping cutouts of heating, refrigeration, water supply, sewage drains, gas supply, fire-fighting water supply systems, etc. were dealt with. However the cutouts of ventilation ducts are a little more complicated. The author explains the legislative and normative requirements for fire-fighting protection equipment. He presents in details the possible technical solutions of ventilation duct cutouts by fire-fighting partition constructions. He draws the attention to specific ambiguousness of requirements of standard ČSN 73 0872. He also warns that according to Regulation No. 246/2001 Coll. the fire damper is a dedicated kind of fire-fighting safety equipment and therefore it is necessary to pay the required attention to their design, erection, but also to maintenance. The article is destined for designers, supply and erection organisations and operators of ventilation equipment.

The paper deals with the analysis of indoor environment in unstable conditions and with the temperatures and velocities fields in film studio by using of the air heating and ventilation. The energy simulations were used for verification of indoor air temperature distribution in occupancy zone; for investigation of the temperature stratification and velocities fields was applied numerical method CFD.

The author brings a brief characteristic of leading European research establishment, at which he as one of the group of Institute of environment engineering students had been studying for a time of one year and after elaboration he defended the degree work on the subject of “Personalised Ventilation in Combination with Total Volume Ventilation”.

The article deals with the experiments aimed at the utilization of solar chimneys in ventilation and passive cooling. These experiments were preformed at the Department of Thermodynamics and Environmental Engineering of the Brno University of Technology. Two different constructions of a solar chimney were tested – a light-weight construction and a construction with thermal mass.

Heat gains from electronic equipment in administration buildings represent an important component of internal thermal load. Data on gain values necessary for the right dimensioning of air conditioning equipment have been analysed in the course of the last years in some foreign studies, however hardly accessible to larger technical public. The contribution resumes the knowledge in this sphere, points out that there are differences between the rating plate values of manufacturers and the real (operational gains and provides the designers with data utilisable in design practice.

The article deals with influence of termotechnical properties of windows, especially glazings on heat use for heating. Comparision a traditional double glazed window with low emission coating glazing makes the window the main energy saving element on building facade between roofs, walls, floors and transparent components.

The article refers to problems of energy evaluation of refrigerating equipment by means of coefficient of performance (COP) especially undermutual comparison of installations operating on the basis of vapour cycle (the so called compressor cycles) and sorption equipment. Therefore it recommends to use in these cases the evaluations based on the primary energy consumption, marked PER, from English “Primary Energy Rate”.

The article deals with the description of implemented computer simulations of behaviour of cold air flowing with low velocity along vertical wall in dependence on the temperature difference with regard to surrounding atmosphere and in dependence on the distance from the flow source. By practical utilisation of the knowledge it is possible to attain savings with regard to energy expended for the cold production, it is possible to create the so called air oases of cold, without necessity of cooling the whole space in case that it is not indispensably necessary.