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The influence of electrolyte additives to lead-acid batteries properties
Dohnal, Martin ; Zimáková, Jana (referee) ; Bača, Petr (advisor)
This day is a lead battery is most prevalent in the automotive industry. Which is a source of energy when starting the car. In recent times the battery is used not only for startups, but also when driving in city traffic. This behavior can know the concept of a hybrid car. Which is used an electric motor which as a result reduce emissions standing cars in cities. The electric motor is powered by lead-acid battery and a rapid discharging and reducing battery life. To extend the life developed additives to the electrolyte. In the thesis, these additives investigated. If they really have a positive effect on the battery.
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The Copyright Law and its Infringing on Internet
Vlach, Aleš ; Dohnal, Martin (referee) ; Soukup, Tomáš (advisor)
My bachelor thesis "The Copyright Law and its Infringing on Internet" deals with a question of conflict in the area of the copyright law and internet. The thesis attends to most importand legal regulations of the international law, the European Union law and the law of Czech Republic. The work explains concept of the law (a work and its usage, copying, etc.) My thesis analyses particular problems of the law breaking with a view to quickly developing technologies in this area. The work also describes legal protections of technological instruments of creations and its breaking. It gives information on possibilities of sanctions resulted from the copyright law breaking. The work deals with possibilities of current problems solving.
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Testing of ventilation outlets for a passenger car cabin
Dohnal, Martin ; Zaremba, Matouš (referee) ; Jedelský, Jan (advisor)
This thesis deals with experimental testing of car cabin ventilation outlets. In first part the main characteristics of air flowing are made and applied on stream from outlet. Next part deals with function and impact of car cabin ventilation system. Another part is dedicated to overview of commonly used metod of outlet testing. Research of usage of different type of outlets in mid-class cars was made. The main part of this thesis is done in final part where the testing is described by the smoke visualisation with use of laser knife and evaluation of results is performed.
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Exhaust Gas Recirculation of a Spark-ignition Engine
Dohnal, Martin ; Lempera, Aleš (referee) ; Drápal, Lubomír (advisor)
This master‘s thesis deals with design adjustment of spark ignition combustion engine, which might offer larger share of recirculated exhaust gases in cylinder for reaching a large number of benefits that exhaust gas recirculation can offer. The introductory theoretical part describes exhaust gas recirculation and its influence on spark ignition combustion engine. In the following part the methods of mixture layering and types of intake ports are described. Further design of spiral intake port is made based on calculations. Capability of mixture layering is valuated by numerical simulation. Flow properties of intake ports are compared to production version by an experiment on flow station.
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Power system operation with a large number of non-rotating power sources
Dohnal, Martin ; Drápela, Jiří (referee) ; Radil, Lukáš (advisor)
This diploma thesis deals with the simulation of various operating situations in the network with many non-rotating power sources, especially focusing on frequency stability. Non-rotating power source is any source that delivers its power to the grid via power electronics. The first part of the thesis describes power system of the Czech Republic and its future development. In the next section, there is short description of today's most common non-rotating power sources. The third part deals with power regulation of the frequency in the grid. The following part describes the models of electrical circuit created for use in PSCAD simulations. The penultimate part describes simulations performed on a model of the network with many non-rotating power sources, which also includes rotating sources. The last part describes simulations performed on a model of the network that is composed of non-rotating power sources only.
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The parameters of MV line
Dohnal, Martin ; Orságová, Jaroslava (referee) ; Toman, Petr (advisor)
This work deals with calculation of parameters of power lines and measuring of them. First part deals with calculation of parameters of power lines. Second part deals with measurement of parameters of power lines. Third part deals with measurement of parameters of real MV line using measuring system OMICRON CPC 100 + CP CU1. Measured values are compared with calculated values.
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Agency employment
Dohnal, Martin ; Štefko, Martin (advisor) ; Lang, Roman (referee)
Agency Employment Abstract My diploma thesis is focused on the agency employment. The institute of agency employment was integrated to our system of the legal regulations in 2004 and nowadays it is a very popular alternative of traditional employment. Employers perceived it as an institute that enables them to react quickly and effectively to the changes which take place on the labour market and therefore gain the needed employees in the right time. I decided to write about this topic mainly because agency employment is very interesting issue with great business opportunities, but unfortunately the Czech regulation isn't as complex and clear as it could be. Therefore, I find this topic quite intriguing. The thesis is divided into introduction, conclusion and six more chapters. First chapter introduces the term and origin of the institute of agency employment within the Czech system of legal regulations. Next chapter focuses on the legal regulation of agency employment. Firstly, I mention very briefly history of the agency employment legislation, then I focus on the international legislation of the agency employment and last but not least I also give a short excursion into European legislation. In the third and fourth chapter I analyse in depth private law aspects of the agency employment and then also...
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Exhaust Gas Recirculation of a Spark-ignition Engine
Dohnal, Martin ; Lempera, Aleš (referee) ; Drápal, Lubomír (advisor)
This master‘s thesis deals with design adjustment of spark ignition combustion engine, which might offer larger share of recirculated exhaust gases in cylinder for reaching a large number of benefits that exhaust gas recirculation can offer. The introductory theoretical part describes exhaust gas recirculation and its influence on spark ignition combustion engine. In the following part the methods of mixture layering and types of intake ports are described. Further design of spiral intake port is made based on calculations. Capability of mixture layering is valuated by numerical simulation. Flow properties of intake ports are compared to production version by an experiment on flow station.
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Power system operation with a large number of non-rotating power sources
Dohnal, Martin ; Drápela, Jiří (referee) ; Radil, Lukáš (advisor)
This diploma thesis deals with the simulation of various operating situations in the network with many non-rotating power sources, especially focusing on frequency stability. Non-rotating power source is any source that delivers its power to the grid via power electronics. The first part of the thesis describes power system of the Czech Republic and its future development. In the next section, there is short description of today's most common non-rotating power sources. The third part deals with power regulation of the frequency in the grid. The following part describes the models of electrical circuit created for use in PSCAD simulations. The penultimate part describes simulations performed on a model of the network with many non-rotating power sources, which also includes rotating sources. The last part describes simulations performed on a model of the network that is composed of non-rotating power sources only.
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The influence of electrolyte additives to lead-acid batteries properties
Dohnal, Martin ; Zimáková, Jana (referee) ; Bača, Petr (advisor)
This day is a lead battery is most prevalent in the automotive industry. Which is a source of energy when starting the car. In recent times the battery is used not only for startups, but also when driving in city traffic. This behavior can know the concept of a hybrid car. Which is used an electric motor which as a result reduce emissions standing cars in cities. The electric motor is powered by lead-acid battery and a rapid discharging and reducing battery life. To extend the life developed additives to the electrolyte. In the thesis, these additives investigated. If they really have a positive effect on the battery.
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