National Repository of Grey Literature 614 records found  beginprevious564 - 573nextend  jump to record: Search took 0.00 seconds. 
Biomass processing for direct combustion
MAREK, Jakub
The aim of this work was to create an overview of the possibilities for using biomass for energy purposes, and treatment technologies for direct combustion of biomass. Furthermore, it was assessing the energy intensity of production of wood briquettes and compared the amount of energy supplied to the process, the amount of energy gained by burning the fuel. As the data were used to assess the monthly energy consumption for the years 2009 and 2010. The average value of energy supplied to the manufacturing process is 91.9 kWh per tonne of briquettes produced in 2009 and 89.8 kWh/t in 2010. The amount of energy embedded in the production of briquettes, then 15 450.7 MJ per tonne of fuel. When compared with the calorific value of briquettes, then the result of the manufacturing process has an energy recovery fuel.
Influence different management on primary production and biodiversity epigeic and hemiedafic beetles in observed drainage area in Šumava.
KISSOVÁ, Lucie
Communities of epigeic beetles were studied on two water catchments with the different management in the submontaneous area of Bohemian Forest (South Bohemia, Czechia). The Mlýnský stream catchment was characteristic by high representation of unforested habitats (pastures and mowed meadows), Horský stream by higher proportion of forested habitats and non equal management (plots without management). The biomass characteristics (above ground and dry) were measured on studied plots. The method of pitfall trapping was used for beetle sampling. Beetle species were divided into two groups after its preferences to shaded: species occurring in unshaded habitats and species occurring in shaded habitats. The degree of human impact was studied by finding of frequency of species of different ecological groups. The above ground biomass was about 2 time higher in Mlýnský stream than in the Horský stream. The dry biomass was practically the same. 57 species was found in the Mlýnský stream and 33 in the Horský stream. The activity of beetles was about five times higher in Mlýnský stream than in the Horský stream. Ubiquitous species prevail in Mlýnský stream and adaptive species in the Horský stream. Stenotopic species were found in the Mlýnský stream only. These results indicate less human impact in Horský stream than in the Mlýnský stream. Beetles prefering unsheded habitats slightly prevail in Mlýnský stream in comparison with Horský stream. Beetle species characteristical for shaded habitats occur in Horský stream in comparison with Mlýnský stream. The geographical exposition affected the beetle structure mainly in the less forested plot of Mlýnský stream. The structure of communites situated to the south differs from communities situated to the north in Mlýnský stream. The effect of exposition is not documented in Horský stream with the greater proportion of forested size.
Project of solving energy situation of renewable resources
DAŇKOVÁ, Petra
The main aim of this thesis is to suggest a project for community heating from renewable energy resources.
Energetic usage of grasses
KOPECKÝ, Marek
The aim of this work is verification the suitability of selected species of grass (Dactylis glomerata, Arrhenatherum elatius, Phalaris arundinacea) for different varieties of energy utilization and the evaluation of economic efficiency of their cultivation and usage. A part of this work is a literature review summarizing the issues of renewable energy, focusing on biomass and energy utilization of grass. There has been used literature of various authors in elaboration the research literature. Based on field tests, there have been developed economic models demonstrating the efficiency of cultivation of selected grass species.
Energy use of phytomass in the South Bohemia Region
NEJEDLÁ, Alice
This bachelor thesis focuses on energetic use of phytomass in the Southern Bohemia. There was identified real and potential production of biomass in the Czech Republic and in the Southern Bohemia. According to the information acquired from literature, internet and questionnairy research there was identified volume of use of energetic sources and biomass deliberately cultivated in Southern Bohemia for energetic use. The results of this research show that Czech Republic meets the commitment to cover 6% of energetic consumption by renewable energy source ? it even reached 8%. Southern Bohemia produces 4,5% of all renewable energy sources of the Czech republic. The research shows that there is a lack of biomass in the Czech Republic, that is why it must be produced by growing energy crops (PEP) and fast growing woods (RRD). Energy crops produces in the Czech Republic are: Sorrel Feed, Miscanthus Chinese, Knotweed, Reed Canary Grass, Hemp, Sorghum. As fast growing woods there are willows and poplars recommended. The most of the renewable energy sources in Southern Bohemia is represented by biomass and its combustion. Its potential is huge, mostly the waste of wood processing ? sawdust and wooden chips, is the most used fuel. Energetic use of biomass has a good perspective in Southern Bohemia. There is still unused waste from logging and straw in agricultural production. There is still hidden potential in growing energy crops and fast growing woods. The development is defended especially by economic reasons and state financial support.
The production analysis of the fast - growing species in experimental areas and plantations in the surroundings of České Budějovice
PLEVKA, Vojtěch
In Czech republic is growing of the fast-growing species in the beginning. This bechelor{\crq}s work is a simple instruction for the growing and harvesting of the fast-growing species. It contains the measurement of the harvest results and description of the harvest by using harvest technology and classical technology. The type of harvester SKPU 220 was chosen to attest its efficiency and suitability for the chipping use.
Possible utilization of grass material
KOBERNA, Daniel
The objective if this degree work is creating a survey of possible uses of surplus grass material which is caused by animal farming reduction and by bringing the ground in less fertile areas of our country to a standstill. In the work possible uses of the grass are described, especially its use in the energy industry as a fuel source for the production of heat and biogas. Classical usage of the grass material as a food source for livestock or for the production of compost is described here as well. Examples are shown there of energy kinds of grass, which seems to be a promising renewable resource of biomass for favourable economic results. The harvest of the grass material and its consequent prossesing is done by production lines, that is why a survey of such lines and their economic figures connected with the operation of these machines is also included in this work. The economic part of this work contains many formulae that can be used for counting out all the costs connected with the operation of the grass harvest machine and for evaluating the effectiveness of the return on investment into this machine
Maize Growing for Energy Generating Purposes
NAVRÁTIL, Martin
In experiment we grown two maize hybrids for energy purpose. Growth was established as small plats. At maize growth main comparable datas were yield and content of dry mass. From outgrowth was selected maize hybrid with bigger yield and better biomass for next energy processing.
Hemp (\kur{Cannabis sativa}) as an energy crop
BOUDOVÁ, Miroslava
One of the main problems of the living environment deterioration is combustion of fossil fuels. It is necessary that people should start using natural renewable resources instead of already abandoned fossil fuels. Energy plants belong those natural renewable resources. One of the energy plants is hemp (Canabis sativa). The advantage of this oil-fibre plant is the possibility of its general usage. The aim of this theses was to sum up the informations about the hemp as an energy plant. In the hemp biomass yield reaches very good results. The hemp is possible to combust as a whole plant or even as hurds or make pellets and briquettes from these materials for the following burning. The heating power of pellets and briquettes compares to the brown coal. The oil extracted from the hemp seeds is possible to use as a fuel in the case of engine conditioning or it can be used as a raw material for the biodiesel production. The other possibility of the hemp energy usage is the production of bioethanol. The appropriate technology for bioethanol production is in progress. According to the forein studies, hemp is suitable due to composition of the biomass for the biogas production. This usage is still in progress. In the Czech Republic there are not so many negligible biogas stations, but these stations use organic animal salvage for the production of the biogas rather than energy plants. In the Czech Republic, hemp is used as the energy plant only for combustionis in the form of pellets or briquettes.
Support from EU funds for biomass usage in the location of the town of Třeboň.
ŘEPA, Michal
The topic of thesis "Support from EU funds for biomass usage in the location of the town of Třeboň" is a analysis of the biomass potential in selected area with a source of energy project. The first part was focused on the importance of renewabla resources of energy and their supporting by EU and Czech Republic. In the second part was presented the analysis of biomass potential, and this part was given the energy project with economic evaluation.

National Repository of Grey Literature : 614 records found   beginprevious564 - 573nextend  jump to record:
Interested in being notified about new results for this query?
Subscribe to the RSS feed.