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Study of passive stabilisation of building materials temperature
Šebek, Jan ; Pavlík,, Zbyšek (referee) ; Zmeškal, Oldřich (advisor)
The topic of presented master’s thesis was study of passive stabilization of building materials temperature. The main goal of this thesis was measuring and characterization of the thermal properties of building materials, which are used to PCM technology. PCM technology is based on utilization of latent heat of phase change. At the beginning of this thesis it was needed to define physical principle of phase change, then the most usable PCM chemicals (e.g. paraffin, Glauber’s salt, hexahydrate calcium chloride) and their basic physical properties (especially thermo-physical), background research of building materials with PCM and also the methods of thermo-physical properties measurement. It was also needed to characterize measured building materials and define theirs thermal parameters; because the values of thermal parameters of measured samples were compared to these values. In the experimental part of my thesis are measurements of material thermal analysis, which are methods, where the properties of materials are studied as they change with temperature. I had used to differential scanning calorimetry, transient pulse method and other methods, which are usable for thermo-physical properties measuring and characterization. I have been much interested in properties of measured material, which were specific heat capacity, temperature diffusivity, heat conductivity and phase change temperature (the melting point of PCM). At the end of my thesis the findings of all methods were finally summarized, compared and commented.
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Proposal of suitable farm implements and technologies for tractors of over 250 kW at a selected agricultural business
Šebek, Jan ; Šařec, Ondřej (advisor) ; Jiří, Jiří (referee)
Diploma thesis is dealing with proposal of suitable farm implements and technologies for tractors of over 250 kW according to chosen methodologies at agricultural business AGRO Slatiny a.s. The introduction specifies a brief characteristic of selected agricultural business which is followed by a description of soil processing methods and comparison of wheeled and crawler tractors. In the next section there is a characteristic of 3 powerful tractors of over 250 kW and implements which are used by those tractors for soil preparation. Furthermore there is a specification of main objective and applied methods. The main goal was calculation of original implement's parameters in regards to work efficiency and economic evaluation. In case of unsatisfactory results the objective is to propose new implements in order to work more efficiently and have better economic results.
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Study of passive stabilisation of building materials temperature
Šebek, Jan ; Pavlík,, Zbyšek (referee) ; Zmeškal, Oldřich (advisor)
The topic of presented master’s thesis was study of passive stabilization of building materials temperature. The main goal of this thesis was measuring and characterization of the thermal properties of building materials, which are used to PCM technology. PCM technology is based on utilization of latent heat of phase change. At the beginning of this thesis it was needed to define physical principle of phase change, then the most usable PCM chemicals (e.g. paraffin, Glauber’s salt, hexahydrate calcium chloride) and their basic physical properties (especially thermo-physical), background research of building materials with PCM and also the methods of thermo-physical properties measurement. It was also needed to characterize measured building materials and define theirs thermal parameters; because the values of thermal parameters of measured samples were compared to these values. In the experimental part of my thesis are measurements of material thermal analysis, which are methods, where the properties of materials are studied as they change with temperature. I had used to differential scanning calorimetry, transient pulse method and other methods, which are usable for thermo-physical properties measuring and characterization. I have been much interested in properties of measured material, which were specific heat capacity, temperature diffusivity, heat conductivity and phase change temperature (the melting point of PCM). At the end of my thesis the findings of all methods were finally summarized, compared and commented.
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The Integration of Operations Department Processes at DHL Express (Czech Republic) s.r.o.
Jumrová, Helena ; Novák, Radek (advisor) ; Šebek, Jan (referee)
Diplomová práce popisuje vznik ?nové? společnosti DHL, kterou zasáhla integrace nadnárodních logistických společností, na poli mezinárodních expresních přeprav. Věnuje se integraci logistických procesů expresní divize společnosti DHL Express (Czech Republic) s.r.o. Dále popisuje postupy používané při realizaci mezinárodní expresní přepravy. Identifikuje složitost a analyzuje dopady provozních integračních procesů na dvou oblastech, z hlediska logistického provozu klíčových, a to na rozmístění terminálové sítě společnosti DHL Express v ČR a na jejích Pick up & Delivery trasách.
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