National Repository of Grey Literature 67 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Simulation of Heat Pump Performance
Lahvička, Juraj ; Pěcha, Jiří (referee) ; Mastný, Petr (advisor)
This work is aimed to design and implement software for simulating operational properties of heat pumps and process data from measurements. Work contains the issue of heat pumps, their principle of functionality, different types of systems and coefficients used for rating of efficiency of heat pumps. Next it contains physical or electrical parameters that needs to be measured by designed system. The result is functional software, which contains mathematical library written in C++ and graphical user interface written in C#.
Optimization of cooperation power station blocks
Smarž, Patrik ; Pěcha, Jiří (referee) ; Mastný, Petr (advisor)
The introduction of this bachelor´s thesis deals with basic terminology used in the power plants. It details the terms: work, power, and efficiency. The other part deals with basic thermal circulation of a condensation power plant and possibilities to increase the thermal circulation efficiency. It describes improvement of admission steam parameters, especially dealing with a steam superheater. Regeneration heating, steam heating and pressure decrease in the condenser are explained as other options of the thermal circulation efficiency improvement. Furthermore, it deals with consumption and cost characteristics of a power generating facility and optimisation of operation of power plants and heating plants in the EC. The model showes an explanation of an optimal distribution of power outputs of two cooperating power units at a given load.
Software tools for creating project documentation
Dirbák, Štefan ; Pěcha, Jiří (referee) ; Bátora, Branislav (advisor)
This Bachelor thesis deals with software tools for the creation of project documentation. The thesis starts with an introduction to project documentation, where its history, the timeline of creation and the benefits for end users are described. The next chapterpresents the division and characteristics of the projection tools. Subsequently, the characteristics of the most commonly used programs for the creation of project documentation are presented, which are divided into categories according to their use. The thesisalso provides an overview of selected programs used by designers. The following part focuses on the creation of a model project of a single-storey family house. The project includes technical report, layout, switchboard design and budget. The final part presents manuals for the design of project documentation, which include work with the programs ElProCAD, Sichr and Verox.
Energy self-sufficiency of small sewage treatment plant
Leksa, František ; Pěcha, Jiří (referee) ; Ptáček, Michal (advisor)
The thesis presents basic information from the area of small wastewater treatment plants. It also deals with the theoretical description of the solar radiation issue and describes the modeling of the photovoltaic cell and the selected type of battery. On the basis of the theoretical knowledge obtained, a model of the system representing the cooperation of the wastewater treatment plant with other energy sources is proposed. The model is created in PSCAD system and its function is verified in several operating scenarios. Depending on this, the work evaluates the achievements of individual operating scenarios that demonstrate different energy requirements for the system as a whole.
Design of a photovoltaic system and its economic evaluation
Hausner, Josef ; Haluza, Miroslav (referee) ; Pěcha, Jiří (advisor)
This Bachelor’s thesis deals with design of the photovoltaic system on a roof of a prefabricated house. In the theoretical part the current technology of photovoltaic cells and panels is analyzed. The next part clarifies current legislative conditions in the Czech Republic. A photovoltaic system is designed in the practical part. In the last part, the project is economically evaluated using a method of the net present value and the internal rate of return.
Biogas stations connected to natural gas distribution systems
Ondra, Jaromír ; Pěcha, Jiří (referee) ; Radil, Lukáš (advisor)
This work deals with the problematics of acquisition, treatment, cleaning and use of biogas. This work mentions the procedures of solutions to problems that occur in this field. This work also deals with options of conecting biogas to central distribution of natural gas.
Using LOXONE system installation for Design control and regulation the heating system in house
Novák, Michael ; Bátora, Branislav (referee) ; Pěcha, Jiří (advisor)
The diploma thesis deals with the division of the system installation and gives an overview of electrical appliances and heating system. It focuses on the Loxone system installation. The main part is the project documentation of wiring, programming the control of a family house and regulation of the solar thermal system for heating water and the heating system control. It also includes a simple economic evaluation of the proposed solar system.
Economics aspects of building and operation of heat power plant utilizing biomass
Špinar, Marek ; Pěcha, Jiří (referee) ; Mastný, Petr (advisor)
This work builds on a semester project where they were processed by the first two points of tasks, this the issue of the use of biomass in energy and needs quantification of biomass for energy production plant defined performance. Now the work is devoted to comparing plants using heat energy from biomass economically and possible future developments respectively. Recommendations for construction. Prior to the issue of technology are addressed aspects related to the implementation of production in terms of investment. Methods are provided solution investment opportunities and outlook on the implementation phase electricity works. The work is devoted to the assessment of value and comparison of different technologies to convert biomass into electricity. The paper compares the capital and operating costs of the considered types of power plants defined performance. The indicator is the ratio CZK / kWh. The important part is the processing recommendations for construction based on the information gathered. This section discusses the sources of electrical energy with a view to the future, therefore consideration of appropriate application of specific types of production with regard to regulation, for use as to the optimal mode of operation. At the end of the work is devoted to the issue of clean energy from biomass, which is the main point of interest in financial support from the state in the form of grants, which the state encourages individual entities in the construction of energy sources and bio establishments.
Design of photovoltaic system for a detached house
Mareček, Jan ; Haluza, Miroslav (referee) ; Pěcha, Jiří (advisor)
This thesis is focused on introduction to the current state of photovoltaic system and its design for detached houses. It describes principle, composition and application of a photovoltaic cell and distribution of photovoltaic systems and converters for installations. It discusses current legislation support of photovoltaic systems in 2013. As a part of this thesis was designed photovoltaic system for detached house and its economic evaluation was prepared.
Heat Pump Supplied from Photovoltaic System
Kaděra, Jan ; Pěcha, Jiří (referee) ; Mastný, Petr (advisor)
This thesis provides heat pump usage in heating mode, heating of potable water or cooling mode. The heat pump is connected with photovoltaic power plant. The main aim of this study is to create photovoltaic system connected with heat pump and present the results of an energetic and economic evaluation. The theoretical part describes principle function heat pumps, photovoltaic power plants and components. The study provides as well a description of heating systems with a heat pump used for space heating or cooling. In the practical part of this thesis was performed calculation of energy consumption in a building. Based on this data, has been selected a suitable heat pump. To reduce the energy consumption was designed a hybrid photovoltaic power plant with a battery accumulation. Utilization of electric energy from photovoltaic system was calculated. Solutions provide the option of the energy flow analysis in specific interval. Results are summarized in the energetic and economic evaluation. The proposed solution can be applied for reconstruction or construction of a new building, focused on usage of renewable resources and emissions reduction.

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4 Pecha, Jan
12 Pecha, Jiří
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