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Ideal cycle gas turbines
Bobčík, Marek ; Mauder, Tomáš (referee) ; Štětina, Josef (advisor)
The purpose of this bachelor thesis is to describe the basic characteristics of ideal cycle gas turbines. It deals with the derivation of basic formulae for thermal efficiency calculation. It then draws a comparison between the thermal efficiency of various types of heat cycles used for gas turbines.
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Prediction of fluids temperature profiles in heat exchanger
Havelková, Pavla ; Kilkovský, Bohuslav (referee) ; Jegla, Zdeněk (advisor)
This master’s thesis is focused on the description and processing of the cell method, which is generally recommended for prediction of fluids temperature profiles in heat exchanger. In the thesis the basic equations for calculating heat transfer are presented and is also described the current situation in the field of computational prediction of fluids temperature profiles in heat exchangers. The cell method is solved by using the software Maple and is applied to the specific case of industrial heat exchangers. The results obtained by the cell method are compared with the results obtained by educational version of software HTRI Xchanger Suite. By this comparison explicitness of the cell method is assessed.
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Ideal cycle turbocharged internal combustion engines
Hrubý, Jakub ; Jedelský, Jan (referee) ; Štětina, Josef (advisor)
The aim of this thesis is description of various charging methods as a one of the most attainable form of ramping up the power and fuel consumption efficiency of naturally aspirated engines nowadays. Main aspect is thermodynamic part of the whole problem, especially the comparison of thermal efficiencies between different cycles. After a short history brief, main reasons why is charging so important are answered. General description, work principles, advantages and disadvantages of new technologies are also included. Emphasis is aimed at topicality and graphic interpretation. Thesis is dealing with charging diesel engines, but also petrol engines in automotive industry and offering a possible way of future development.
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Gas turbines
Bukáček, Miroslav ; Kracík, Petr (referee) ; Pospíšil, Jiří (advisor)
The aim of this Bachelor thesis is create a summary of gas turbines and their comparison with internal combustion piston engines. This thesis deals with work cycles of gas turbines, internal combustion piston engines and their effectiveness. It contains a description of the basic components necessary for the operation of gas turbines. In conclusion is comparing of gas turbines and internal combustion piston engine.
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Rankine cycle with water steam for power generation
Uhříček, Michal ; Mauder, Tomáš (referee) ; Klimeš, Lubomír (advisor)
The Rankine cycle with water steam is the basic thermal cycle used in power generation for producing electricity. Through this cycle thermal energy (of any source) is transformed into shaft work, which then generates electricity. Therefore, the aim is to achieve the highest efficiency of this transformation with losing as little of the usable energy as possible. This bachelor thesis is focused on describing the general thermodynamics cycle, the basic Rankine cycle and Rankine cycles with modifications, which help to increase the thermal efficiency. The practical part of this thesis is dedicated to programming the script in the MATLAB programming environment for easy thermodynamic analysis of the basic ideal Rankine cycle.
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Gas - steam cycle
Tóth, Richard ; Špiláček, Michal (referee) ; Kracík, Petr (advisor)
The Bachelor thesis „Gas-steam cycle“ explains the cycle from technical point and then its application in economic terms. At the beginning is explaind how gas turbine work and its application in Czech republic and World. In practical part are for real Gas-steam cycle Power Plant in simplified way calculated basic parameters and efficiency in full operation and operating only with gas turbines. The end contains a design of Heat recovery steam generator.
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Thermodynamic cycles used in power engineering
Suchomel, Josef ; Kracík, Petr (referee) ; Baláš, Marek (advisor)
Power engineering is one of the most important parts of industry. Among other things, it deals with production of electricity, without which many of us can no longer even imagine life. All energy devices can be described on the basis of different thermodynamic cycles. And with these thermodynamic cycles this thesis deals. It lists both, the most important cycles, such as Rankin Clausius cycle, which is the basic cycle of most of the power plants, as well as less known, resp. almost new thermodynamic cycles. The emphasis of the whole work is also focused on the advantages and limitations of the stated cycles and on their application in practise, too.
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Combined heat and power generation
Hlaváč, Ivan ; Zálešák, Martin (referee) ; Klimeš, Lubomír (advisor)
The bachelor thesis deals with the power generation by means of a combined gas-steam cycle. In the first part of the work, an overview and description of the combined cycle as well as of the Brayton cycle and the Rankine cycle are provided. The second part of the work focuses in the thermal analysis of the cycles. As a part of the work, a computer program was created, which allows for such thermal analysis of the combined cycle.
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Rankine cycle with water steam for power generation
Uhříček, Michal ; Mauder, Tomáš (referee) ; Klimeš, Lubomír (advisor)
The Rankine cycle with water steam is the basic thermal cycle used in power generation for producing electricity. Through this cycle thermal energy (of any source) is transformed into shaft work, which then generates electricity. Therefore, the aim is to achieve the highest efficiency of this transformation with losing as little of the usable energy as possible. This bachelor thesis is focused on describing the general thermodynamics cycle, the basic Rankine cycle and Rankine cycles with modifications, which help to increase the thermal efficiency. The practical part of this thesis is dedicated to programming the script in the MATLAB programming environment for easy thermodynamic analysis of the basic ideal Rankine cycle.
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Influence of gas properties on the IC engine cycle
Ptáček, Martin ; Klimeš, Lubomír (referee) ; Štětina, Josef (advisor)
Properties of gases forming during combustion process in combustion engine influences the engine efficiency and fuel consumption. Harmful substances are formed during combustion, which could be reduced by combustion optimization. The thesis studies the change of gas properties inside combustion engine during temperature changes. The aim of this thesis is description and creation of models describing thermodynamic cycle of spark ignition engine. The First part of thesis explains basic ideal gas properties and principle of spark ignition engines. Second part deals with description of combustion process and substances, which enters and leaves the process. Created theoretical models are compared to each other during conclusion. Achieved results and created models can be used as foundation for creation of complex programs.
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