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Process computer simulation
Čech, Michal ; Pavlas, Martin (referee) ; Touš, Michal (advisor)
The thesis deals with computer simulation of processes, which is crucial in the field of process engineering. In the first part, the methodology of modeling and simulation techniques is described as well as mass and energy balances. Specific approaches to process simulation are included. The thesis offers a list of the most often used simulation programs and their typical structure. Sequential modular and equation-based simulation is demonstrated on an example. The results are then verified by simulation software W2E.
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Utilization of waste heat from rectification
Frank, Vojtěch ; Konečná, Eva (referee) ; Touš, Michal (advisor)
The purpose of the thesis is to draw up a model of the energy and material balance using technical and technological analysis of the current state of production of waste heat in the process of distillation. Using these results, subsequently evaluate the energy potential of individual streams and propose optimal energy savings using waste heat. Emphasis is placed on the modelling of the process and the various proposed savings options. The result is also an evaluation of the potential of the proposed savings based on the results of the calculation.
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Concept of linear motors measurement workplace
Knobloch, Jan ; Červinka, Dalibor (referee) ; Klíma, Bohumil (advisor)
Master’s thesis handles about measurement on linear motors. Acts about set of two linear machines on one rail. One is motor and second is load. Thesis paies their mathematical description, control and measurement. It’s made measurement of the linear motor load characteristic. Next measurement have to do with losses in the converter. Is chosen measuring instrument t for measurement during working cycle. During working cycle has determine power eciency of entire drive.
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Biomass and waste gasification and cogeneration by the help of microturbine
Kašpar, Matěj ; Najser,, Jan (referee) ; Baláš, Marek (advisor)
This diploma thesis investigate the question of combined production of heat and power by the gasification of biomass. The introduction describes basic dilemma energy conversion from biomass. Further, special attention at the gasification technology and it´s usage at combined heat and power production is paid. The main section includes schematic proposal cycle with use of microturbine 80 [kWe] as well as basic calculation, which serves as a base for folowing project optimization. For discussed optimization is made concept of configuration, thermal and aerodynamics calculation for both heat exchangers B1 and B2. Last but not least these heat exangers were compared by different aspects such as influence of deposits on power transfer and pressure loss. At the end of the work calculated numeric values are discussed and the project of heat exchanger with it´s advantages for practise are summarised.
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Cooperation of heat pump with passive solar system
Bohůn, Vojtěch ; Králová, Zuzana (referee) ; Mastný, Petr (advisor)
This bachelor thesis deals with alternative energy sources – a solar system and a heat pump. Their operation is energy-advantageous and they can be efficiently connected in one system. The focus of this thesis is firstly to give an overview of kinds, function, properties, constructional elements and usual arrangements of active and passive solar systems and heat pumps in connection with heating of buildings, secondly to suggest a connection of a combined heating system with a heat pump and of a passive solar system and to evaluate it from an energetic and economic point of view. Firstly, a basic theory for calculation of quantity of electrical energy absorbed by a surface is introduced. Then, a categorization and construction of active and passive systems are presented. Hereafter, advantages and disadvantages of single solar systems are described and basic calculation relations for determination of a heat gain and of proportions of passive solar systems are showed. Subsequently, the function of a heat pump is analyzed, the categorization of its kinds according to the relevant criteria is given and its basic functional elements, typical properties and means of possible use are described. On the basis of gained knowledge, conditions of cooperation of a heat pump with a passive solar system are summarized and substantiated. According to these conditions and to the construction of an object, a combined system is designed for, a connection of a system with a heat pump air / water, a heat accumulator and a recuperative unit is constructed. Consequential calculations evaluate energetic needs of an object and heat gains of a passive solar system. They serve as a basis for a concept of heat source and for determination of an energy balance. A total annual heat need is 13914,7 kWh. It was compared with the case when the object was equipped with standard-size windows. The comparison shows that a passive solar system can spare roughly one third of total annual heat consumption. From the measurement on the object is determined, when a passive solar system is able to supply a heat pump with heat. After that, the suggested system is evaluated from an economic point of view: it is compared with other possible heat sources by the method of net present value. It can be said that solid fuel firing and gas firing are economically more advantageous than the use of a heat pump. The reasons are particularly high initial costs and in case of wood firing also its low price. In conclusion, the gained results are summarized.
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Operating costs of passive houses
Baranyková, Zuzana ; Chovancová, Jitka (referee) ; Výskala, Miloslav (advisor)
The main topic of this thesis is the comparison of operating costs (energy balance) of a passive house with running costs of a house of an ordinary construction. Total operating costs of those types of construction are determined and the houses are subsequently divided into groups according to their actual consumption and a comparison of the different types of construction is carried out.
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L-band antenna and low noise amplifier
Kučera, Ondřej ; Lukeš, Zbyněk (referee) ; Záplata, Filip (advisor)
This master thesis is dealing with a system for receiving meteorological images from satellites placed on lower orbit. Furthermore it gives basic information about satellites NOAA, METOP and FY. It also includes derivations of equations, that define minimal requirements for receiving antenna and LNA. From reached parametres, energetic balance for connection of the satellite and Earth is calculated. The main part of the master thesis is designing of low-noise amplifier for L band. LNA is implemented on the substrate FR4 and Arlon DiClad 870, circuit is designed with elements of parametres, which are spread out or concentrated. The last part of the thesis describes design of antenna for reception of meteorological images.
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Energy Performance certificate of the Building and Energy Review
Složil, Jan ; Adam, Pavel (referee) ; Horák, Petr (advisor)
This bachelor thesis solves the energy assessment of the apartment building. The theoretical part deals with heat pumps, because in the practical part the heat pump is proposed as a saving measure. In the computational part there is an analysis of the energy needs and flows of the building and energy assessment of the building. The project includes certificate of energy performance of the building and energy assessment.
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NEW CHANNEL CODING METHODS FOR SATELLITE COMMUNICATION
Rumánek, Jaroslav ; Levický, Dušan (referee) ; Žalud, Václav (referee) ; Šebesta, Jiří (advisor)
This dissertation thesis deals with new progressive channel coding methods for data transmission using satellite transponder. The design of the system for SMS transmission, in which novel turbo coding methods are applied, is discussed too. An achievement of the lowest output power and the smallest user aperture is the principal aim of the new method applications. Design of system that would be able to the error free SMS transmission by very low signal to noise ratio is analyzed in this dissertation thesis. The work is focused on energy budget, modification and implementation of new turbo code types and using unique properties, development of new bit error rate estimation methods and methods for determination of final SMS form. The main contribution is the new type of turbo code development that have optimal properties for this usage, development of new bit error rate estimation method and development of method that is able to determine final form of SMS on the basis SMS frame structure and turbo decoding theory when the bit error rate is not zero.
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Energy self-sufficient houses
Šošolíková, Jana ; Aigel, Petr (referee) ; Výskala, Miloslav (advisor)
This Bachelor´s thesis deals with the energy self-sufficient houses compared with the low-energy, passive and active construction. The aim of the practical part of the thesis is to assess the operational and investment costs compare with the energy of another buildings and other structures.
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