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Performance of PV-system strongly depends on climate variables. In less favourable climate conditions, as in Central Europe, highly varying radiation is very frequent. In such consitions, the accurate energy yield predictions from PV-systems require more accurate thermal modelling, than simple industry-standard approach based on single NOCT parameter. The paper demonstrates the method for extraction...
Variable nature of solar radiation makes it impossible to deliver energy from photovoltaic (PV) system at constant power level. Energy backup and storage, typically lead-acid batteries or utility grid, is always needed. In climate of Central Europe, the short and deep changes of radiation are common during the summer months. In this case, the energy storage build with supercapacitors can mitigate...
The exploitation of the daylight in the illumination of the offices is one of the possibilities of the electrical energy saving for lighting. The paper presents the calculations performed in order to estimate the possible savings in Polish climate. The amount of energy consumed by artificial light sources for an exemplary office is taken as a reference. Power demands together with energy consumption...
The generalized railway crossing problem was defined as a benchmark problem for comparing different formal methods and methodologies developed for specifying and analysing mixed hardware/software systems. Various solutions of this problem were developed by the real-time researchers. The authors of this paper presents the model of a crossing controller specified in terms of coloured Petri nets. Important...
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