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With sustainable energy being the key to reaching climate neutrality, the utilization of non-wooden biomass is a necessity. This article compares the emissions and efficiency of combusting a number of types of agrobiomass and wood pellets. A comparison was made on a moving grate pellet burner mounted in a boiler, where flue gas had a vertical flow via two pass heat exchangers with turbulization elements. Tests were conducted on wood pellets (ENPlus), miscanthus straw pellets, sunflower husk pellets, and corn stover pellets. During combustion, both wood and miscanthus pellets met the PN-EN 303-5:2012 emission and efficiency requirements. Corn stover pellets met the requirement on the nominal capacity. Sunflower husk pellets are characterized by excessive CO and particulate matter emissions. Sunflower husk pellets were the most problematic fuel from the point of view of the results of this research. During combustion of the miscanthus straw pellets there was a need to decrease the nominal heating capacity due to ash sintering.

Abstract. This paper shows the results of analysis of the wind potential in selected locations in the southern Poland (placed in the Małopolskie, Świętokrzyskie and Podkarpackie Voivodships). The measurements and analysis of the wind resources in potential locations of the wind turbines are important part of the investment process. The statistical analysis involves the creation of histograms (e.g. histogram of the wind speed and direction) and fitting those histograms to theoretical distributions (e.g. Weilbull distributions of wind speed). Such analysis has been described and conducted using measurement data for four selected locations. Basis on the conducted analysis, the economy efficiency and environmental impact of wind turbine operation has been estimated. Three market available wind turbines have been included to calculate NPV, IRR and SPBT indicators. Then, the avoided emissions of CO2, NOx, SO2 and dust have been calculated. There were also conducted some calculation using TRNSYS simulation software. The results of simulations have been compared with measurement data and the level of convergence have been found.

R&D in the nuclear reactor physics demands state-of-the-art numerical tools that are able to characterize investigated nuclear systems with high accuracy. In this paper, we present the Monte Carlo Continuous Energy Burnup Code (MCB) developed at AGH University's Department of Nuclear Energy. The code is a versatile numerical tool dedicated to simulations of radiation transport and radiation-induced changes in matter in advanced nuclear systems like Fourth Generation nuclear reactors.We present the general characteristics of the code and its application for modeling of Very-High-Temperature Reactors and Lead-Cooled Fast Rectors. Currently, the code is being implemented on the supercomputers of the Academic Computer Center (CYFRONET) of AGH University and will soon be available to the international scientific community.

The paper analyzes the possible directions of development of the Polish electricity sector by 2050 in terms of its adaptation to the EU requirements. The analysis was performed for different scenarios of development of CCS technology, nuclear energy development conditions and forecasted fuel prices on the domestic market, assuming the EU's targets for energy and climate policy. Strategic directions of sector development, taking into account investments in gas-fired and nuclear power plants were considered. Position of coal in the future fuel structure of Polish electricity generation and its conditions were discussed. The costs of electricity production in the analyzed scenarios are set out. The areas of government activityessential for strategic decisions determining the direction of development of the energy sector in Poland are presented. The presented studies assumed equal preferences for all types of fuels and technologies while assuming the market prices of fuels. The Government, determining the desired directions of development of the sector, can stimulate their development by creating preferences, such as preferential tax treatment. Essential is active participation of the Polish government in setting the specific targets valid for European countries in future. Without denying the need to reduce emissions, Poland should have an impact on the choice of quantity and quality of indicative targets, which will have to be met. A target to reduce emissions should not be accompanied by further objectives. For example, a target to increase share of renewable energy sources limits the development of energy mix.