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Thermodynamic method for assessing hydraulic machine efficiency
Mizera, Ladislav ; Ševčík, Petr (referee) ; Habán, Vladimír (advisor)
The master´s thesis contained basic information about the method of thermodynamic efficiency of hydraulic machines. The first part briefly mentioned our opinion on the most widely used method for determining the efficiency of hydraulic machines. Another section of thesis is characterization and measurement procedure using the thermodynamic method. Another section describes measurements of water plants and laboratory measurements, which took place in the past. The final part describes the results of laboratory measurements, which took place in the lab of VUT FSI Brno, and evaluating and comparing the results.
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Electronic thermostat
Flek, Tomáš ; Číž, Radim (referee) ; Lattenberg, Ivo (advisor)
In essence, this thesis focuses on a search for an optimal measuring method suitable for converting a temperature measurement into an electrical signal that can be processed easily in the other parts of the electrical circuit. The selection of the measurement method was guided by the need to find one suitable for the temperature range in question. For each method there are different temperatures sensors, each with different parameters. This thesis covers in detail the various kinds of temperature sensors and notes their advantage and disadvantage, accuracy, repeatability, non-linearity, longevity, and purchasing price. The thesis also investigates how to cope with non-linearity of the selected temperature sensor while also listing various methods for non-linearity compensation and their effect on the overall measuring. A part of the thesis presents a design of a suitable thermostat that was selected on the basis of this work to provide suitable measuring properties and be most cost effective.
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Calculations of temperature fields on the model of induction motor
Koníček, Pavel ; Makki, Zbyněk (referee) ; Janda, Marcel (advisor)
The aim of this work is to get acquainted with the construction of induction motor, the calculation of temperature fields in the motor model in ANSYS Workbench and subsequent evaluation of the results for different operating conditions. There is provided a general description of the function and design of induction motor, a summary of sources of heat inside the engine design, heat transfer theory, the basic description of the finite element method and ANSYS Workbench description. Furthermore, comparison of temperatures measured on a real engine with the values obtained from the calculation program.
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System for measurement of aerobic stability of forage
Synek, Josef ; Sekora, Jiří (referee) ; Harabiš, Vratislav (advisor)
Aerobic stability is a term which nutritionists use to define the length of time that forage remains stabil and don‘t degrade. Once fermentation is completed and the forage is exposed to air during feeding or during storage (leaky silos, poor packaging) increases the temperature of the forage initiated by yeasts or lesser extent by the action of some bacterias. This temperature is measured using temperature sensors and it is compared with the ambient temperature of the surroundings. Aerobic stability is given as the time, for which the forage temperature rises by 3°C above ambient temperature.
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Calculations of temperature fields on the model of induction motor
Koníček, Pavel ; Makki, Zbyněk (referee) ; Janda, Marcel (advisor)
The aim of this work is to get acquainted with the construction of induction motor, the calculation of temperature fields in the motor model in ANSYS Workbench and subsequent evaluation of the results for different operating conditions. There is provided a general description of the function and design of induction motor, a summary of sources of heat inside the engine design, heat transfer theory, the basic description of the finite element method and ANSYS Workbench description. Furthermore, comparison of temperatures measured on a real engine with the values obtained from the calculation program.
|
|
|
Thermodynamic method for assessing hydraulic machine efficiency
Mizera, Ladislav ; Ševčík, Petr (referee) ; Habán, Vladimír (advisor)
The master´s thesis contained basic information about the method of thermodynamic efficiency of hydraulic machines. The first part briefly mentioned our opinion on the most widely used method for determining the efficiency of hydraulic machines. Another section of thesis is characterization and measurement procedure using the thermodynamic method. Another section describes measurements of water plants and laboratory measurements, which took place in the past. The final part describes the results of laboratory measurements, which took place in the lab of VUT FSI Brno, and evaluating and comparing the results.
|
|
|
Electronic thermostat
Flek, Tomáš ; Číž, Radim (referee) ; Lattenberg, Ivo (advisor)
In essence, this thesis focuses on a search for an optimal measuring method suitable for converting a temperature measurement into an electrical signal that can be processed easily in the other parts of the electrical circuit. The selection of the measurement method was guided by the need to find one suitable for the temperature range in question. For each method there are different temperatures sensors, each with different parameters. This thesis covers in detail the various kinds of temperature sensors and notes their advantage and disadvantage, accuracy, repeatability, non-linearity, longevity, and purchasing price. The thesis also investigates how to cope with non-linearity of the selected temperature sensor while also listing various methods for non-linearity compensation and their effect on the overall measuring. A part of the thesis presents a design of a suitable thermostat that was selected on the basis of this work to provide suitable measuring properties and be most cost effective.
|
|
|
System for measurement of aerobic stability of forage
Synek, Josef ; Sekora, Jiří (referee) ; Harabiš, Vratislav (advisor)
Aerobic stability is a term which nutritionists use to define the length of time that forage remains stabil and don‘t degrade. Once fermentation is completed and the forage is exposed to air during feeding or during storage (leaky silos, poor packaging) increases the temperature of the forage initiated by yeasts or lesser extent by the action of some bacterias. This temperature is measured using temperature sensors and it is compared with the ambient temperature of the surroundings. Aerobic stability is given as the time, for which the forage temperature rises by 3°C above ambient temperature.
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