Coal in Poland is an available conventional fuel providing energy security and independence of the country. Therefore, conventional energy generation should be based on coal with the optimal development of renewable energy sources. Such a solution secures the energy supply based on coal and the independence of political and economic turmoil of global markets. Polish coal reserves can secure the energy supply for decades. Coal will surely be important for energy security in the future despite the growing share of oil and gas in energy mix. The development of renewable power generation will be possible with the conventional energy generation offsetting volatile renewable power generation as Poland’s climate doesn’t allow for the stable and effective use of renewable energy sources. Considering the policy of the European Union with respect to emission reductions of greenhouse gasses and general trends as reflected in the Paris agreement in 2016, as a country we will be forced to increase renewable energy production in our energy mix. However, this process cannot impact the energy security of the country and stability and the uninterrupted supply of energy to consumers. Therefore seeking the compromise with the current energy mix in Poland is the best way to its gradual change with the simultaneous conservation of each of the sources of energy. It’s obvious that Poland can not be lonely energy island in Europe and in the world, which increasingly develops distributed energy and/ renewable technologies as well as energy storage ones. One can notice that without renewable generation and the reduction of coal’s share in country’s energy mix we will become the importer of electricity with raising energy dependence.
Obtaining a pure product by mixing together raw materials, so as to carry out a chemical reaction at high selectivity, is a difficult part of manufacturing chemical products. How can we test reactors and mixers to ensure the efficient use of energy?
The article presents the challenges faced by the hard coal mining sector in Poland. The biggest challenge results from a decrease in the demand for coal, which was triggered mainly by the climate policy, including the tightening of environmental standards and an increase in the efficiency of generating units. The fundamental model of the MRÓWKA domestic coal market has been described. The model allows for determining the marginal price of a given fuel for a given generating unit in the system and the optimal mix of fuels to meet the energy demand. The results of the model calculations for the baseline and alternative scenarios were presented. It has been shown that the optimal distribution of coal mining capacities promotes the import of the discussed fuel in the north-eastern part of the country and that the individual customer valuation leads to a decrease in the competitiveness of the units located in the central-western part of the country. The paper also discusses the potential impact of the domestic oversupply on the balance sheet and the price of coal. According to the obtained results and the basic laws of economics, an oversupply of coal leads to a decrease in prices. For the analyzed variants, the dependence of prices was estimated at PLN 0.0308 / GJ for every million tons of the oversupply. The fall in prices is largely due to the fuel supply to units located close to ports or railway border crossings. Based on the presented arguments it can be concluded that the maximization of financial result from the extraction of coal should be based on an analysis taking incremental changes in fuel prices into account.
The two chosen estates, Garnizon and Wiszace Ogrody have evolved during the last decade or so in Gdańsk. Both developed with the idea of balanced functionality and New Urbanism despite very diff erent locations. The aim was to combine apartment buildings with shops, other services, hotels, offi ce buildings and cultural venues. Numerous interesting and inviting public spaces were also high on the agenda. It was intended to create an interesting, multifunctional space, to maximise the use of the space throughout the day, also making it eco friendly by minimising the use of cars. That`s how an interesting, beautifull space impacts the energy. The centrally located Garnizon has been quite successful, whereas the more peripherally placed Wiszące Ogrody has not quite succeeded due to fi nancial restrictions and is mainly a housing estate at the moment. The hope is that it will grow into a similar entity with new development and helped by the new rail link.