DETERMINATION OF CARBON DIOXIDE CONCENTRATION IN CLASSES
Journal Title: Вісник Національного університету "Львівська політехніка". Серія "Теорія та практика будівництва" - Year 2018, Vol 0, Issue 904
Abstract
In the last decade, modernization of school buildings in Ukraine is being carried out. Thermorenoval measures such as thermal insulation of exterior walls and replacement of existing windows are most often used. Installing hermetic metal-plastic windows significantly reduces the heat loss of premises, but leads to disturbance of air regime, as outdoor air infiltration is often the only source of external fresh air supply. The study of the air environment in the classrooms is very relevant, since about 20% of the total population spends a significant part of their day in preschool and school settings. Failure to comply of microclimate parameters in classrooms, in particular due to the increase of CO2 concentration, leads to deterioration of the state of health and workability of students, as well as insufficient mastering of the educational material. Due to the deterioration of the environmental state of the environment, the concentration of CO2 in the outside air of large cities often exceeds the permissible values. This leads to an increase in the productivity of ventilation systems, designed to assimilate CO2. The article presents the results of analytical studies of changes in CO2 concentration in classrooms during the entire period of their stay in the students under the three schemes of organization of air exchange, namely when closed windows during the entire training period and without ventilation; when ventilated class during each breaks and in the presence of inflow and exhaust ventilation in the classrooms. The analysis of the air environment was carried out for the most unfavorable conditions at negative external air temperatures. As a result of the research, it was established that only in the presence of mechanical inflow and exhaust ventilation with an air exchange rate of 30 m3/hour per person provides adequate sanitary and hygienic conditions in the classrooms.
Authors and Affiliations
Yurii Yurkevych, Orest Voznyak, Olena Savchenko, Khrystyna Myroniuk
RESULTS OF EXPERIMENTAL RESEARCH OF BEARING CAPACITY OF PLASTIC SLEEVE ANCHORS IN THIN AERATED CONCRETE MASONRY UNDER AXIAL LOAD
This article is devoted to a problem of anchoring strength of anchors (wall plugs) in thin aerated concrete blockwork. The question of bearing capacity of anchor fastenings in aerated concrete walls is slightly unveiled...
COMPARING OF THE VOLUME OF STORMWATER RUNOFF FROM TYPICAL RESIDENTIAL CATCHMENTS IN LARGEST CITIES, CALCULATED ACCORDING TO UKRAINIAN NORMATIVE DOCUMENTS
It was analyzed Ukrainian normative documents, regulating the procedure of calculating the average annual volume of stormwater runoff from urbanized areas. It was found the big differences as in the numerical values of t...
Оцінка ефективності акумулювання теплоти твердими теплоакумулюючими елементами електротеплового акумулятора
Conducted calculated and experimental research of thermal processes and storage capacity of solid heat storage materials. Analyzed the change of the thermo physical properties of the selected heat storage materials depen...
SOFTWARE FOR 4D MODELLING OF CONSTRUCTION PROJECTS
Most complex projects in the Architecture, Engineering, and Construction industries involve multidisciplinary collaboration and the exchange of large building data set. Traditionally, the collaboration efforts across the...
Динамічність оптимального термічного опору стін будинків
In this paper the results of mathematical provement of economical optimal thermal resistance of a building wall are presented at condition of both heat energy and thermal renewal cost change on future. There are presente...