Silesian University of Technology is a university located in Gliwice, Silesia, Poland. It was founded in 1945 by Polish professors of the Lwow Polytechnic, who were forced to leave their native city and move to the Recovered Territories .The University consistently ranks among the top most prestigious technical universities in Poland.The Silesian University of Technology has 12 faculties: Faculty of Architecture, Faculty of Automatic control, Electronics and Computer Science, Faculty of Civil Engineering, Faculty of Chemistry, Faculty of Electrical Engineering,Faculty of Philology, Faculty of Mining and Geology, Faculty of Energy and Environmental Engineering, Faculty of Applied Mathematics, Faculty of Mechanical Engineering, Faculty of Materials Science, Metallurgy, Faculty of Organisation and Management, Faculty of Transport. The first nine faculties are situated in Gliwice and Rybnik and the remaining three are in Katowice, Zabrze, Tychy and Bytom. Wikipedia.
Kalina J.,Silesian University of Technology
Applied Thermal Engineering | Year: 2011
The paper theoretically investigates the performance of a distributed generation plant made up of gasifier, Internal Combustion Engine (ICE) and Organic Rankine Cycle (ORC) machine as a bottoming unit. The system can be used for maximization of electricity production from biomass in the case where there is no heat demand for cogeneration plant. To analyze the performance of the gasifier a model based on the thermodynamic equilibrium approach is used. Performance of the gas engine is estimated on the basis of the analysis of its theoretical thermodynamic cycle. Three different setups of the plant are being examined. In the first one the ORC module is driven only by the heat recovered from engine exhaust gas and cooling water. Waste heat from a gasifier is used for gasification air preheating. In the second configuration a thermal oil circuit is applied. The oil transfers heat from engine and raw gas cooler into the ORC. In the third configuration it is proposed to apply a double cascade arrangement of the ORC unit with a two-stage low temperature evaporation of working fluid. This novel approach allows utilization of the total waste heat from the low temperature engine cooling circuit. Two gas engines of different characteristics are taken into account. The results obtained were compared in terms of electric energy generation efficiency of the system. The lowest obtained value of the efficiency was 23.6% while the highest one was 28.3%. These are very favorable values in comparison with other existing small and medium scale biomass-fuelled power generation plants. © 2011 Elsevier Ltd. All rights reserved.
Katunin A.,Silesian University of Technology
Mechanical Systems and Signal Processing | Year: 2011
In this paper the construction of general order two-dimensional B-spline wavelets was presented and applied for damage identification in polymeric composite plates. At the very beginning the algorithm of one- and two-dimensional discrete wavelet transform and formulation of one- and two-dimensional B-spline wavelets with examples were presented. The fully clamped square layered composite plate was modeled using finite element-based software. Estimated natural modes of vibration with various damage configurations were analyzed using the two-dimensional sixth-order B-spline wavelet, and the method of damage identification was presented. The effective damage identification is based on the evaluation of the singularities in horizontal, vertical and diagonal details coefficients. Results obtained based on the numerical data were verified experimentally. Research results show the effectiveness of B-spline wavelets in application to the diagnostics and structural health monitoring. © 2011 Elsevier Ltd. All rights reserved.
Slota D.,Silesian University of Technology
Computers and Structures | Year: 2011
The scope of the paper is an algorithm reconstructing the boundary conditions (heat flux and heat transfer coefficient) in the solidification of pure metals on the grounds of temperature measurements. For the verification of the algorithm experimental data derived in the course of the solidification of aluminum were used. An example of the application of the algorithm for designating the cooling conditions in continuous casting is provided, when the values of temperature at selected points on the boundary of the casting are known. © 2010 Elsevier Ltd. All rights reserved.
Golaszewski J.,Silesian University of Technology
Construction and Building Materials | Year: 2012
In the paper are presented the results of investigation into the influence that specific surface S sc, C 3A, Na 2Oe and SO 3 content have in cement and the interaction of these factors on PC and PE superplasticizer performance. In order to obtain unequivocal relationships, laboratory - prepared cements were used. The composition and specific surface of those cements were changed strictly according to an assumed research plan, while other properties were kept constant. In order to make the achieved relationships as useful as possible for creating the workability of SCC and HPC, the research was conducted on mortars. © 2012 Elsevier Ltd. All rights reserved.
Lazniewska-Piekarczyk B.,Silesian University of Technology
Construction and Building Materials | Year: 2012
The influence of a new generation superplasticizer (SP) type, air-entraining admixture (AEA), viscosity modifying admixture (VMA) and anti-foaming admixture (AFA) on the air-content, workability of self-compacting concrete (SCC) is analyzed in the paper. The purpose of this study was to examine the influence of the admixtures on porosity and pore size distribution of SCC at constant water on cement ratio, type and volume of aggregate and volume of cement paste. The compressive strength, frost resistance and durability coefficient (DF), parameters of the air-voids of hardened SCC are also investigated. © 2012 Elsevier Ltd. All rights reserved.