Biomass usage in CHP units

This article deals with overview of biomass usage in combined heat and power units (CHP). The aim of the paper is to explain fundamentals of CHP units and heat and power generation with these units. Article deals also with basic requirements for connecting these blocks into power grid and differences in operation between decentralised CHP units and centralised power plants. In beginning of article the authors devote about basic principles of extraction fuel from biomass and with processing of biomass

Troj-variantné spracovanie a vyrovnanie observácií a určovaných odhadov

The present article deals with three-variant processing and finding estimates of unknown parameters in a geodetic network by the technology of global navigation satellite systems in 2004, 2008 and 2011. The assessment of the impact of a used method of adjustment on the estimation of parameters of the first and second order of the geodetic network and the presentation of results of a deformation analysis with graphical visualisation of individual processing and analyses are the objectives of this paper. An LSM method and robust M-estimates according to Huber and Hampel were used for the processing and adjustment of observations. All three processing methods showed a displacement of point No. 5005 in the epoch 04-08 in the analysis of the stability of points, which is also confirmed by graphical visualisations using confidence error ellipsoids.Predmetný článok sa zaoberá trivariántnym spracovaním a určením odhadov neznámych parametrov v geo-detickej sieti observovanej technológiu využívajúcou signály globálnych navigačných satelitných systémov v ro-koch 2004, 2008 a 2011. Cieľom práce je zhodnotiť vplyv použitej metódy vyrovnania na odhad parametrov pr-vého a druhého rádu geodetickej siete a prezentovať výsledky analýzy pretvorení s grafickou vizualizáciu jednot-livých spracovaní a analýz. Na spracovanie a vyrovnanie observácií boli použité MNŠ a robustné M-odhady podľa Hubera a Hampela. Pri analýze stability bodov poukázali všetky 3 metódy spracovania na posun bodu 5005 v epoche 04-08, čo potvrdzujú aj grafické vizualizácie pomocou konfidenčných elipsoidov chýb

Return on shares of steel companies under the influence of mergers and acquisitions

The present article intends to asses returns on shares of the steel companies that were formed based on either merger or acquisition. The analysis included 14 operations in the steel industry. Attention was paid to returns of the companies performing acquisitions, as well as to the returns on shares that presented the acquisition target. The analysis was performed based on the “event study” method, and the analysed event was the announcement or notification of realization of an acquisition. Shares of the target steel companies as well as acquirers are attaining higher returns, but the change was not statistical significant.Web of Science54130630

Overview of biomass usage in combined heat and power units

This article deals with overview of biomass usage in combined heat and power units (CHP). The aim of the paper is to explain fundamentals and basic properties of these units and heat and power generation with these units. Article deals also with basic requirements for connecting these blocks into power grid and differences in operation between decentralised CHP units and centralised power plants. In beginning of article the authors devote about basic principles of extraction fuel from biomass and with processing of biomass. Decentralised units are introduced also on examples of onsite solutions of these units

Operation of hydropower plants in Slovakia

This paper deals about hydropower plants in Slovakia. Hydropower is the most used renewable energy source for electricity in the Slovak Republic. Hydro potential of rivers is used to generate electrical energy, which is permanently renewing and inexhaustible primary energy source

Biomass as universal energy source for decentralized heating and electricity production of small cities

This paper deals with analyse of possible usage of biomass power plants for heating and electricity production in small villages and cities. The aim is to describe applicability of such plants in combination with other renewable energy sources in certain parts of electrical grid. Communities, such as local villages and small cities with agricultural companies or wood industry, can advantageously use residues from this production to produce electricity and heat. In paper, a case study for such heat and electricity system for such small city is presented

New trends in photovoltaic

The photovoltaic (PV) used in harvesting the solar energy and transferring it to electricity is being continuously improved and still it is an active research topic. This paper deals with the latest information from the field of photovoltaic cells and its efficiency and materials used for their production. It also presents new trends in the inverters used for PV energy systems

Biomass usage in CHP units

This article deals with overview of biomass usage in combined heat and power units (CHP). The aim of the paper is to explain fundamentals of CHP units and heat and power generation with these units. Article deals also with basic requirements for connecting these blocks into power grid and differences in operation between decentralised CHP units and centralised power plants. In beginning of article the authors devote about basic principles of extraction fuel from biomass and with processing of biomass

Troj-Variantné Spracovanie A Vyrovnanie Observácií A Určovaných Odhadov/ Three-Variant Processing and Adjustment of Observations and Determined Estimations

The present article deals with three-variant processing and finding estimates of unknown parameters in a geodetic network by the technology of global navigation satellite systems in 2004, 2008 and 2011. The assessment of the impact of a used method of adjustment on the estimation of parameters of the first and second order of the geodetic network and the presentation of results of a deformation analysis with graphical visualisation of individual processing and analyses are the objectives of this paper. An LSM method and robust M-estimates according to Huber and Hampel were used for the processing and adjustment of observations. All three processing methods showed a displacement of point No. 5005 in the epoch 04-08 in the analysis of the stability of points, which is also confirmed by graphical visualisations using confidence error ellipsoids

Using pyrolysis of biomass for production fuels and gases for energetics

The Pyrolysis method for biomass processing was presented in this paper. One from lot of methods for comparing kinds and properties of biomass in pyrolysis process was selected thermogravimetric analysis (TGA). The aim of this paper is presenting current research in pyrolysis from agricultural countries. In general, using of biomass can be convenient, primarily in developing countries for fulfillment international emission standards