Małgorzata Basińska

Analysis of the possibilities to achieve the low energy residential buildings standards

AbstractThe article applies the global costs calculation method to the energy assessment of selected solutions for the technical equipping of buildings, dependant on their purpose and function. Representative archetypes, the life span of which were assumed to be 30-years, were used to estimate the performance of the minimum requirements according to the building regulations valid in 2013, current general standards, as well as low energy building and passive house standards. The subjects of the analysis were three residential buildings, for which the variability of the cladding and ventilation needs was assumed. In all analysed cases the application of four systems of energy supply to the building was also assumed. The optimal level of primary energy index value, dependant on the source of heat, was established by means of the global cost method. This level was then compared with the requirements presently valid in Poland. The analysis also allowed for the determination of the growth in investment costs, t...

VARIABILITY OF MICROBIAL AIR POLLUTION AND DUST CONCENTRATION INSIDE AND OUTSIDE A SELECTED SCHOOL IN POZNAŃ

The article presents an analysis of the variability of air parameters quality realized in the two cycles measured (03.2013 and 11.2014). The measurements were made during 1.5 years in selected educational building from the 70s. Measurements in each cycle research were carried out in two classrooms, before lessons and directly after they are finished and outside the building. The research included an assessment of the physical air quality (the air temperature, relative humidity, CO2 concentration) and microbiological contamination (the general count of mesophilic bacteria, the general count of psychrophilic bacteria, the count of staphylococcus (Staphylococcus) mannitol positive (type α) and mannitol negative (type β), the count of Pseudomonas fluorescens bacteria, actinobacteria (Actinobacteria), as well as the general count of microscopic fungi). Additionally, air samples were taken to determine the concentration of dust in the classroom before lessons and immediately after their end. The quality of the physical air correlated with the abundance and activity of students in classrooms. The measurement results of microbiological contaminations were compared with the Polish requirements (PN), in order to classify the degree

APPLICATION OF TRANSPARENT INSULATION MATERIALS TO BUILDINGS HEATING IN PASSIVE SOLAR SYSTEMS

Abstract The aim of this paper is to present a numerical model, based on the finite difference method and able to describe the heat transfer in a room with indirect passive solar system in form of transparent insulation material (TIM) wall. Results of numerical calculations of thermal fields in TIM wall, in room with passive solar system, under climatic conditions of typical meteorological year for Poznan, are presented. Also the estimation of energy savings for selected rooms with TIM wall is given. Construction of a numerical model of building includes calculation of distribution of temperatures in all walls forming the enclosure, composition of system of energy balance equations for nodes representative of rooms and its solution. In numerical calculations of the thermal states of rooms with transparent walls, an analysis of respective components of thermal balance there has been conducted, in conjunction with required radiator heating power of automated heating installation—coacting with passive solar ...