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The paper presents results of calculations conducted on a change of demand for thermal power in a greenhouse covered with standard garden glass and a low-emission glass. Changes of heat demand were also determined. Changes of the amount of fuel (fine coal size grade) as well as changes in the emission of pollutants to the atmosphere were estimated based on calculations. It was determined that covering...
Useless waste materials are often stored in urban areas taking valuable land and polluting the environment. There has been undertaken research which aim was to test the applicability of the ashes from multi-year heaps as a partial substitute for sand. In the ash-cement composites 10%, 20% and 30% weight of sand was replaced by an ash. Composites sand-ash-cement was modified by an addition of hydrated...
A model of the grinding and classification processes in the fluidized bed opposed jet mill based on the Markov chains approach was proposed. The methodology of modelling was elaborated and experimental research of the combined processes of grinding and classification was carried out.
Our study is based on a column experiment of water flow through a porous granular bed. In Part 1 we propose eight methods to derive parameters of flow models based on measurement data. These parameters are permeability and Forchheimer coefficient for Darcy’s and Forchheimer’s laws. The approach presented in this part uses two numerical models to perform simulations of flow. One model is based on the...
In order to launch the newly bought creep testing machine, concrete creep was studied. The creep coefficients were calculated and the results were compared to results reached based on Eurocode 2 regulations. The results were compatible.
The aim of this study is to derive flow parameters, which are permeability and Forchheimer coefficient, based on experimentally measured flow rates and pressure drops. When flow rates used in measurements exceed the limits of linear Darcy’s flow regime we discuss what needs to be taken into account while processing the measurements. The study consists of two parts. In this part we briefly recall Darcy’s...
The paper presents results on whether and how the magnetic domain structure in maraging steel undergoes any change due to the aging process. It continues the works on application of correlation methods and fractal analysis into studies of magnetic properties of various steel alloys using Scanning Probe Microscopy. It is aimed at verifying the usefulness of the structure function for description of...
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