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Mikolas M.,Institute of Mining Engineering and Safety | Bartonova J.,Institute of Economics and Control Systems | Magnuskova J.,Institute of Economics and Control Systems | Letavkova D.,Institute of Economics and Control Systems
Komunikacie | Year: 2014

This paper analyses both individual components of the price of electricity and the electricity rates as related to individual modes of heating. The price development has been monitored and assessed since July 1, 2001, i.e. the date on which the 'Price Decree of the Energy Regulation Office, No. 5/2001' entered into force concerning introduction of new rates and prices of electricity for households and businesses. Primarily, the rate, D 02d, was chosen for assessment. This rate is used by the majority of households as they use gas or solid fuels for heating. Further, the rate, D45 d, for direct electric heating, and rates, D55 d and D 56 d, for heating by thermal pumps were also subject of assessment. Both the development trends and the comparison of the investigated rates of electricity make it obvious that prices of electricity will continue to be rising in the long-term perspective.

Hlavacek P.,Institute of Physics | Valicek J.,Institute of Physics | Brumek J.,VSB - Technical University of Ostrava | Zelenak M.,Institute of Physics | And 3 more authors.
Chemicke Listy | Year: 2011

The paper deals with the possibilities of using the indetation tests for the evaluation of machinability of materials during abrasive water jet cutting. Indentation tests are used to simulate the interaction between abrasive particles and material during the process of abrasive water jet cutting. On the basis of these tests the machinability of materials can be characterized. The machinability of materials is very important for optimization of the technological process parameters of abrasive water jet cutting, which affect the quality, performance and economy of the entire process.

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