|
|
Method for Energy Efficience Simulation of Machine Tools in Design Stage
Tůma, Jiří ; Blecha, Petr (advisor)
Ph.D. thesis is focused on the design of the method for simulation of energy demands of machine tool in operation at the stage of its development. Proposed method is developer on the basis of literature search in science and in industry. The method itself is composed of five related steps, that must be realised in the proper order in order to create a relevant energy profile of a machine tool. The output from the method are simulated data providing a course of comsumed energy and required power which are time dependent. Output data are obtained on the basis of the drive system simulation of machine tool through G-code, that is interpreted for simulation by the compiler into the matrix. It contains data necessary for controlling of machine tool, such as the required end points of the tool and required feed rates, to which is assigned a time value. G-code is partially time parametrized. It is then followed by full time parametrization through a of mathematical model of drive mechanisms and due the synergy of software for drive mechanisms control (Matlab Simulink) and software for physical simulation (MSC Adams) is processed into output data. As an input parameter figures also coefficient used as multiplier of the normal force of driving mechanisms, which is a function of feed rate. This loss function is obtained experimantally. In the context of Ph.D. thesis were conducted two experiments, used to verify the developed method. For each experiment is proceeded according to estabilished method and it is included a comparsion of simulation and measured data for various operating modes. The proposed method, described in the Ph.D. thesis, allows designers to summarize the energy demand of the proposed machine before its production. When correctly interpreted, the results of the method can serve as a basis for improving the energy profile and thereby increasing the energy efficiency of the machine tool.
|
|
|
Thermal Insulation of Apartment Buildings: Decision-making Process and Effect on Energy Savings
Častorálová, Lucie ; Ščasný, Milan (advisor) ; Chytilová, Julie (referee)
Thermal Insulation of Apartment Buildings: Decision-making Process and Effect on Energy Savings Abstract In order to lower the emissions of green-house gases it is necessary to explore the wide range of the energy efficiency options. This thesis attempts to analyse the effect of thermal insulation installed in the multi-family apartment buildings during the period of 2006-2012 in the Czech Republic. We also investigate whether providing governmental funding further improves energy performance of the insulated apartment buildings. In addition, we examine the collective decision-making processes of members of the multi-family apartment building associations, including their attitudes towards thermal insulation of their houses. The basis of this thesis is the econometric panel data model (with 45 apartment buildings and their energy consumption before and after the insulation) evaluated by the fixed effects method with cluster confirming that the insulation, investments and public funding had all significant and negative impact on the energy consumption in the buildings, when energy consumption was adjusted for weather conditions. After the analysis it was concluded that the more the owners invest in thermal insulation, the more they will save in the long run. The governmental funding led to even greater...
|
|
|
Efficiency of the energy use of biomass
Szelecky, Zsolt ; Brázdil, Marian (referee) ; Baláš, Marek (advisor)
This final thesis deals with the theme of energetic usage of biomass and its energy efficiency. In the first part the term „biomass“ is explained and classified into categories. The main part of this work deals with technology converts of raw biomass into valuable energy products. The final section is closely connected with the previous part, where the emphasis is placed on energetic effiency of abovementioned technology converts.
|
|
|
Heat pump with accumalation
Kohout, Jiří ; Lisý, Martin (referee) ; Pospíšil, Jiří (advisor)
This diploma thesis deals with the assessment of SCOP of the heat pump installed in the selected building and with the determination of optimal size of accumulation which should help to heat pump work with higher temperature and higher SCOP. Annual savings of operating cost and return of investment from installation of accumulation tank are evaluated in this thesis. In the research part of this thesis are described the main components of heat pump, sources of low-potential heat and types of heat pump.
|
|
|
Energy law and protection of the environment
Vohnoutová, Alena ; Damohorský, Milan (advisor) ; Sobotka, Michal (referee)
The aim of my thesis is to create a comprehensive overview of energy law with special focus on its influence on the environment. It especially deals with individual renewable energy sources and their support, construction of facilities utilizing these sources and their impact on the environment. Last but not least, in each chapter I draw attention to recent or expected amendments to relevant legislation. In the first chapter I divide sources of energy into the fossil, nuclear and renewable ones. Besides presenting the basic characteristics of such sources, I also deal with the time period in which the humankind will run out of their supplies, as well as with detrimental effects that their mining and processing have on the environment. Based on the classification included in the Act on the Promotion of Renewable Energy Sources, I continue with classifying the renewable energy sources to wind power, energy of water and solar radiation, geothermal energy, biomass and biogas. I consider their benefits, but also their harmful effects on the environment. Each subchapter also contains a part that deals with the potential of such resources in the Czech Republic. Since Czech energy law is influenced by both international and European laws, I dedicate the next chapter to them. On the level of international...
|
|
|
Economic Consequences of Mandatory Energy Performance Certificate Processing for Public Sector
Tintěra, Tomáš ; Loužek, Marek (advisor) ; Maule, Petr (referee)
Bachelor thesis deals with the impact assessment of introduction of the requirement for processing energy performance certificate (PENB) for buildings in possession of public sector. It inspects in detail Czech as well as European legislative connected with energy efficiency, and it examines the differences in approaches to its implementation between EU member states, and its consequences. Moreover, thesis inspects the impact assessment process of EU legislation. Main part of thesis consists of an evaluation of approach of Czech public sector to fulfilling given obligations. From inspection of sample of municipalities, it shows that the targets set by legislative are not being met. At last, thesis analyzes data on public contracts which indicate that there is no such methodology which would inform the state itself about the real energy performance certification impacts on national economy.
|
|
|
Energy efficiency of heat pumps
Bártů, Marek ; Hejčík, Jiří (referee) ; Pospíšil, Jiří (advisor)
This diploma thesis deals with the energy efficiency of heat pumps, especially efficiency of air/water system. In the this thesis is simply described the principle of the heat pump and function of each component. It shows the issues of determining the parameters of performance of the heat pump and also describes verification in according to applicable standards. The diploma thesis gives an analysis of determining the energetical efficiency and calculation of coefficient of performance, in other words, the seasonal heating coefficient of performance. Seasonal energy efficiency of selected samples of heat pumps for the heating season is designated for specific climatic conditions.
|
|
|
Development and Implementation of Energy Savings and Energy Management Methodology in an Industrial Enterprise
Dudarev, Ivan ; Demeč, Peter (referee) ; Suchánek, Rostislav (referee) ; Blecha, Petr (advisor)
V současné době se problematika energetických úspor dostává do popředí zájmu jak na úrovni jednotlivých podniků, tak i na úrovni celého státu. Často bývá příčinou sporů ve vědeckých kruzích i mezi odborníky z praxe. Lidstvo tradičně začalo využívat energii z minerálních přírodních zdrojů, které však ve srovnání s obnovitelnými zdroji energie mají omezení. Výzkum a implementace moderních technologií jsou ztíženy otázkou investic a časově omezeny. Proto se evropská strategie energetické bezpečnosti zaměřuje na energetickou účinnost, která je jedním z nejefektivnějších způsobů zlepšení bezpečnosti spotřeby energie. Velké společnosti a podniky jsou jedním z hlavních spotřebitelů energie. Proto je tato vědecká práce zaměřena na problematiku úspor energie a zlepšování energetické účinnosti podniku. Těžiště práce spočívá ve vytvoření a zavedení metodiky pro úsporu energie a managementu hospodaření s energií ve výrobním procesu automobilového podniku. Dále je pro účely této práce vytvořen a popsán způsob vizualizace spotřeby energie v prostředí virtuální reality
|
|
|
Development and implementation of energy savings and energy management methodology in an industrial enterprise
Dudarev, Ivan ; Blecha, Petr (advisor)
V současné době se problematika energetických úspor dostává do popředí zájmu jak na úrovni jednotlivých podniků, tak i na úrovni celého státu. Často bývá příčinou sporů ve vědeckých kruzích i mezi odborníky z praxe. Lidstvo tradičně začalo využívat energii z minerálních přírodních zdrojů, které však ve srovnání s obnovitelnými zdroji energie mají omezení. Výzkum a implementace moderních technologií jsou ztíženy otázkou investic a časově omezeny. Proto se evropská strategie energetické bezpečnosti zaměřuje na energetickou účinnost, která je jedním z nejefektivnějších způsobů zlepšení bezpečnosti spotřeby energie. Velké společnosti a podniky jsou jedním z hlavních spotřebitelů energie. Proto je tato vědecká práce zaměřena na problematiku úspor energie a zlepšování energetické účinnosti podniku. Těžiště práce spočívá ve vytvoření a zavedení metodiky pro úsporu energie a managementu hospodaření s energií ve výrobním procesu automobilového podniku. Dále je pro účely této práce vytvořen a popsán způsob vizualizace spotřeby energie v prostředí virtuální reality
|
|
|
Energy efficient hydraulic system design for force loading of vehicle drivetrain systems
Robenek, Vít ; Ožana, Otakar (referee) ; Houška, Pavel (advisor)
The thesis focuses on a hydraulic system design for a specific application of hydrostatic drive with regard to energy efficiency of proposed solution. Standard hydraulic and electronic components are used, mostly products of Bosch Rexroth. The aim of the thesis is to carry out a complex design from mechanic through hydraulic up to the electronic part of the system. After a short introduction in the beginning of the thesis is the particular application described and analyzed. Then the elemental principles of hydraulic devices and systems are explained. In the following part the actual solution is presented, which expands to several different alternatives. These alternatives are compared according to set criteria and the selected alternative is then further developed. At the end of the thesis, the outputs are evaluated and the direction of further possible improvements in the design is outlined.
|
guest ::
