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Application of thermal camera for analysis of heat
Palička, David ; Pokorný, Jan (referee) ; Lízal, František (advisor)
Within this bachelor degree thesis I have focused on the thermal losses from storage tanks serving as asphalt binders. I have used the theory of non-contact temperature measurements using a thermovision camera. In the first part of this document I deal with the history, theory and some basic principles of non-contact temperature measurements. In the second part I am examining the thermovision camera settings. The third part considers the function of the asphalt mixture production plant itself, as well as the function of storage tanks. In the last part of this thesis I analyze the results of the measurements. The goal of this analysis is to compare results of thermal losses from storage tanks heated with thermal oil, and storage tanks heated with an electrical thermocouple.
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Mechanical design of impact simulator under reduced gravity
Melichar, Marek ; Pokorný, Jan (referee) ; Návrat, Tomáš (advisor)
The diploma thesis is focused on the development of the concept of a mechanical device that would meet the necessary requirements to achieve a successful simulation of reduced gravity or microgravity on the tested body at its impact. The choice of a suitable mechanism is based on a literary research of all available variants and highlight of their specifics. Target values are created for the selected method of testing, upon reaching which the concept will be considered successful. In order to verify the functionality of the concept, a mechanism is assembled on a smaller scale. The individual components of the mechanism are tested and carefully selected. All essential physical processes taking place in the system are mathematically described and combined into a MATLAB script. A separate application is created to calculate the behavior of the system based on the specified input parameters.
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Real consumption of primary energy of plug-in hybrid and electric cars
Bochníček, Ondřej ; Pokorný, Jan (referee) ; Fišer, Jan (advisor)
The topic of bachelor thesis is to evaluate a consumption of primary energy in electric cars and plug-in hybrids depending on the place of the operation and also to compare a particular representative with similar classic cars with combustion engine. Another criterion used for evaluation is the emission of carbon dioxide for one driven kilometer. For the consumption of primary energy in electric cars and plug-in hybrids is essential to know how is the electricity produced in the chosen area. With the energy mix of each state, characteristics of given ways of producing electricity and consumptions of selected cars the consumption of primary energy of selected cars and emission of carbon dioxide for one driven kilometer were determined. From the computed data results, that the lowest energy consumption have the electric cars driven in countries with dominant representation of renewable energy sources. Conversely the worst conditions are in the countries with high part of fossil fuels in electricity production. From the comparison of single electric cars and plug-in hybrids with classic cars results that electric cars or plug-in hybrids are at the time of writing this thesis practically in all cases more energy efficient and also produce less emission of carbon dioxide.
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Design of micro drive for harvester
Jonák, Vojtěch ; Pokorný, Jan (referee) ; Škopán, Miroslav (advisor)
This master thesis deals with design of hydrostatic drive for harvester. It contains calculations of parameters from current drive like speed, hydraulic losses and tractive effort. Because now these parameters are insufficient in next part of work is proposed few options how to achieve required parameters. In selected cases are made calculations and based on the results are recommended two options for realization.
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Web User Interface for a Information Extraction Tool
Pokorný, Jan ; Křivka, Zbyněk (referee) ; Burget, Radek (advisor)
In this work you can read about the design and implementation of the JavaScript application, which serves as a user interface for the data extraction tool. The application offers an environment in which the user manages extraction tasks. Tasks are created using interactive graphs. This functionality is achieved through the current modern trends in JavaScript applications that are described in the work. In particular, it is a React library and Redux state manager.
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Drivers clothing thermal resistance database for iHVAC system
Hrubanová, Kristýna ; Pokorný, Jan (referee) ; Fišer, Jan (advisor)
This diploma thesis is focused on measurement of thermal properties of clothes by thermal manikin and on application of results for prediction of thermal comfort in system iHVAC. First part of thesis is dedicated to research with relation to this topic and to definitions of main computational equations necessary for experimental measurement. The choise of method for measurement based on available standards is an important part of this thesis. The main focus of thesis lies on measuring 5 combinations of clothes at different calibration temperatures and same temperature of manikin surface. Then data are examined and also the analysis of uncertaities and repeatability is maked. According to assupmtion , the independence of value of heat transfer coefficient to ambient temperature is comfirmed and calculated heat resistance of every single clothes is compared to existing wardrobe for system iHVAC. The outcome of this thesis is specificied and completed virtual wardrobe which serves to prediction of thermal comfort in car.
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Acausal modelling of termomechanical problems using Modelica
Shestakov, Andrey ; Elcner, Jakub (referee) ; Pokorný, Jan (advisor)
The aim of this bachelor thesis was the development of a library for solving thermodynamics tasks in Modelica. The library contains models of cycles working with both the ideal gas, and the real substances. The main part of the work is the description and modeling of Steam Rankine Cycle and Organic Rankine Cycle that are applied in Waste Heat Recovery (WHR). The working principle of both cycles is similar. The main difference is in the working fluid. In this work, we give a technical economical assessment of the application of ORC system in concrete industry for energy costs reduction. The change of ORC parameters with the choice of particular working fluid is the main task of the thesis. Based on the simulated model results for selected working fluids (water, Cyclopentane, Toluene, Heptane, R123 and R245fa), we concluded that the highest efficiency was achieved with R245fa refrigerant for Organic Rankine Cycle in case of selected initial conditions.
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Algorithms for Movement Control of Bipedal Robot
Pokorný, Jan ; Janoušek, Vladimír (referee) ; Martinek, David (advisor)
This thesis is focused on using softcomputing method for learning bipedal robot to walk. Robot is represented by virtual model. At the beginning are the motivation and reasons for processing this theme. Next is devised shape of the robot which will be used. Then are selected libraries used by simulation. Further is devised system of robot learning algorithms. The most important of them is SOMA which is therefore described more. Due to assumed computational complexity is part of thesis focused on optimalization and simplification. One chapter focuses on measurement of quality of solution approximation. At the end there is an evaluation of thesis results.
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Coupling of the Models of Human Physiology and Thermal Comfort
Pokorný, Jan ; Masaryk, Michal (referee) ; Kratochvíl, Zdeněk (referee) ; Jícha, Miroslav (advisor)
The thesis deals with car cabin environment and thermal comfort inside. A car cabin heat load model was developed in Dymola/Modelica to investigate influence of ambient environmental parameters. The model was validated on the data set of eight test cases measured in a climatic chamber and in a real traffic. The main objective of the thesis was to develop a human thermal comfort model suitable for non-homogenous environments and for a car cabin environment especially. The Coupled model of human physiology and thermal comfort was developed in Dymola/Modelica. The model allows predicting an overall human thermal comfort from local boundary conditions representing ambient and personal factors. The model was validated by 16 test cases taken from experiments in literature. Moreover three test cases were created in Theseus-FE to consider an asymmetrical heat load from Sun rays inside a car cabin. Prediction of the Coupled model was compared with Fiala model and experimental data. The Coupled model predicted mean skin temperature for moderate activities in neutral and warm environment well. In cold environment a predicted core temperature was very affected by ambient temperature and during high activity exercises, the predicted mean skin temperature was too high.
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