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Mechanical and Electrical Properties of Thin Metal Films Deposited by Vacuum Evaporation
W. F. Yahya, Doaa ; Kolařík, Vladimír (referee) ; Štencl,, Jiří (referee) ; Šandera, Josef (advisor)
Thin layers are widely used in many fields of technology and today we can say that they are found in all modern technologies. Thin layers can be created in two ways, namely by chemical or physical means. This work focuses on the latter method, more particularly a technology of thermal evaporation of thin layers in a vacuum. The work focuses on the process principles during and after the evaporation. Much of the work focuses on the development and design of experiments. These experiments illustrate some of the phenomena that take place on thin films produced by the aforementioned technology. Work helps to better understand processes during formation of thin layers and properties that influence the quality and stability of thin films. In conclusion we describe results of experiments and new developments in the field of thin films deposition using evaporation under vakuum are summarized.
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Steam ejector pump
Třináctý, Jan ; Baláš, Marek (referee) ; Šnajdárek, Ladislav (advisor)
The aim of this theses is to do search about maintaining vaccum in surface condensors and subsequently propose basic dimension of one stage steam ejector. The first part deals with the issue of vacuum. The following part is dedicated to description of various types of vacuum pumps. Hence it describes the principle of operation of each pump as well as their output. The following part deals with vacuum and vacuum technology in the field of power engineering. This part is dedicated to those types of vacuum pumps that are used in power engineering, especially to steam ejectors which are most widely used. The final part is addressed to the design of single stage steam ejector. This part contains the calculation of pump dimension. The conclusion evaluates the design of one stage steam ejector.
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The application tanker for the trailer MEGA 33
Koukal, Vojtěch ; Molva, Martin (referee) ; Kašpárek, Jaroslav (advisor)
This diploma thesis deals with conceptual design of application tanker for swap carrier MEGA 33. The first part of the thesis is focused on filling and emptying process possibilities, material alternatives used for the tankers manufacturing and evaluation of tankers with similar construction solution. The main part of this thesis describes conceptual design of tanker carrier. On the basis of this concept the stress analysis using finite element method has been completed. This thesis also includes relevant drawing documentation.
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Using Cosmos FloWorks for analyse the detector.
Bordovský, Petr ; Špinka, Jiří (referee) ; Maxa, Jiří (advisor)
This work deal with the analysis of influence of pressure‘s sizes in vacuum chamber of specimen Evironmental Scanning Electron Microscope and the influence of sizes of aperture diaphragm by scintillation detector. The analysis proceeds in detector of secondary electrons. The detector is modelled by system 3D CAD SolidWorks with the help of system CAE Cosmos FloWorks.
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Energy Performance of sewerage networks
Žďára, Jan ; Hluštík, Petr (referee) ; Raclavský, Jaroslav (advisor)
First section of this master thesis is background research of energy demand of sewer systems. Intrudoctory chapter explains basic concepts. Second chapter is dealing with Czech and European legislation concerning energy consumption of water service. Third chapter describes energy demand of sewer systems. In this chapter there are described conventional gravity, vakuum and pressure sewer systems and components with major power consumption. Fourth chapter describes actual state of energy demand of WWTP and possible ways of improving power consumption of WWTP. Second section is a review of energy consumtion of vacuum systems of five different municipalities including one WWTP. Measured and evaluated outputs were used to create energy audit methodology for sewer systems.
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Řízení vývěvy dojicího stroje frekvenčním měničem
Šimoník, Jiří
The diploma thesis is focused on the issue of controlling the vacuum pump of the milking machine with the help of a frequency converter. The theoretical part deals with stables for dairy cows. The principles of welfare and housing of dairy cows, as well as other types of cattle, are briefly described here. Emphasis is placed on the description of individual types of milking parlours and their advantages and disadvantages are highlighted. The main part of the literary research of the diploma thesis is devoted to machine milking. The principle of machine milking, vacuum regulation and individual types of vacuum pumps are described in this section. Stress is also put on the drive of vacuum cleaners, namely asynchronous motors. In the practical part, an uncontrolled asynchronous motor is compared with a controlled asynchronous motor using a frequency converter during milking. In this part of the thesis, both laboratory measurements and measurements in the company are performed. On the basis of the obtained values, the technical and economic parameters of the individual methods of controlling the asynchronous motor are subsequently evaluated both in the laboratory and in the field.
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Řízení činnosti vývěvy dojicího stroje
Kudělka, Jan
Dissertation is concerned with the activity of the pump milking machine in order to save energy while maintaining the stability of the vacuum. The searching describes the operation of milking machine with regulation in vakuum milking systém. The literature review characterizes the basic functional components of milking equipment, their characteristics and technical specifications. The purpose of practical part is to design, create and describe alternatives for controlling the operation of milking machine´s pump via the inverter. Other importem task is to recommend a methodology to interpret the measurement of vacuum and consumption of electricity so the sets parameters can be compared. Dissertation also vertifies if the involvement of the drive systém can not adversely affect the operation of asynchronous electric motor.
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The application tanker for the trailer MEGA 33
Koukal, Vojtěch ; Molva, Martin (referee) ; Kašpárek, Jaroslav (advisor)
This diploma thesis deals with conceptual design of application tanker for swap carrier MEGA 33. The first part of the thesis is focused on filling and emptying process possibilities, material alternatives used for the tankers manufacturing and evaluation of tankers with similar construction solution. The main part of this thesis describes conceptual design of tanker carrier. On the basis of this concept the stress analysis using finite element method has been completed. This thesis also includes relevant drawing documentation.
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