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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Úloha obnovitelných zdrojů energie v rozvoji venkova. Případová studie Jablunkovska

Kubalík, Ondřej January 2018 (has links)
Renewable energy sources are currently at their maximum capacity, but this does not mean that they are slowing down in growing. The first part of the thesis is focused on the issue of renewable resources in the countryside at a general level. The second part is focused specially on the territory of Jablunkov and the possibility of using individual sources of renewable energy in this area. Three of the most suitable sources have been chosen for practical realization options, including economic calculations, these include both fixed costs and operational costs. Calculations were made using the so-called „Kotlíková kalkulačka“, the Photovoltaic Geographical Information System and Microsoft Office. Part of the thesis is also an assessment of the ecological and social aspects of renewable resources, including their impact on the use of the territory itself and the impact on the landscape. The results clearly show up the benefits of new technologies in both economic and environmental terms, and provide space for further use of renewable energy sources, whether in rural areas or in cities. Economically, the purchase of a heat pump is the best choice, the possibility of building new jobs is mainly provided by using of biomass. The thesis should serve as support for an even greater use of renewable energy, or in the decision making progress in choosing the most suitable alternative of renewable energy source for a family house.
32

Návrh dřevostavby jako nástavba rodinného domu a posouzení variant

Novák, Michal January 2018 (has links)
This thesis deals with the design of the superstructure of the family house in the construction system of a wooden building. The main objective is to assess the original state of the house. According to this assessment the superstructure design with regard to applicable regulations and standards should be done. The static assessment of the truss roof and the assessment of two variants of the perimeter shell in terms of thermal engineering should be also considered. The superstructure design was done according to valid legislation and standards in AutoCAD. The static assessment of the roof was solved in the Pamite program by Mitek. The thermal engineering assessment was carried out in PHPP. The result of this work is the project documentation of the construction with a static assessment of the truss and the energy performance of the building.
33

Vliv režimu práce zážehového motoru na jeho tepelnou bilanci

Studený, Petr January 2017 (has links)
The diploma thesis presents a topic The Influence of the Mode of Work of a Petrol Engine on its Heat Balance. The thesis is divided into two parts. The first one is focused on the characteristics of combustion engines and on individual components of a spark-ignition engine, which are closely related to a measurement of the heat balance. Second part of the presented thesis describes methodology of the heat balance measurement on a spark-ignition engine at the motor testing institute of Department of Technology and Automobile Transport of Mendel University in Brno. It is primarily focused on change of the individual heat flow components during different loading modes and graphic representation of them.
34

Klimatizační systém jednoho reprezentativního podlaží budovy A1 / Air-conditioning system of a typical floor of A1 building

Pekárek, Antonín January 2009 (has links)
Master thesis deals with designing of air-conditioning system into newly reconstructed high-rise building of Faculty of Mechanical Engineering Brno University of Technology. Reconstruction of a building results in change of thermo-technical parameters which impacts dimensioning of air condition system. Designing air-conditioning system depends on heat loss and heat gain calculation and also on consequential psychometrical calculations. The size of air conditioning equipment which provides required internal microclimate will be determined from the calculation results. Currently there is Detail design elaborated including technical report and material specification.
35

Zvýšení tepelně-izolačních parametrů klasických obytných budov a jejich vliv na kvalitu vnitřního prostředí / Improvement of heat insulation parameters of classic residential buildings and their impact on quality of inner environment

Pospíšil, David January 2011 (has links)
Master’s Thesis deals with utilization of energy simulation software in area of classic brick buildings and measures to decrease heat consumption. Introduction deals with historic development of heat loss demands in Czech Republic and ways how to decrease heat loss through different types of building elements. Next chapter is focused on indoor microclimate and it’s affecting factors. Last but not least are mentioned environmental and financial aspects of these adjustments. Final part shows examined buildings, simulation configurations and output evaluations.
36

Tepelné vlastnosti forem v závislosti na použitém ostřivu / Thermoproperties of foundry moulds in dependence on different used foundry sands

Šuráň, Jiří January 2012 (has links)
The project elaborated in frame of engineering studies is submitting the study of thermal properties of holding mixtures using different types of sand. Were tested a total of 5 sands: zirkon, ŠH22, chromite, olivine and dunite. Molding compounds were tested for thermal capacity, thermal conductivity and heat accumulation. The highest heat capacity was achieved in dunite sand. The largest heat accumulation had mixture with chromite sand and the best thermal conductivity was found in a mixture with olivine sand.
37

Snižování tření mazaných kontaktů změnou tepelné vodivosti materiálů / Improving friction of lubricated contacts by modifying thermal conductivity

Šnevajs, Matěj January 2019 (has links)
This thesis deals with an experimental study regarding the effects of the thermal conductivity of contact bodies on the friction, lubricant film thickness and temperature distribution in EHL contact. The thesis focuses on the configuration of the ball on disc contact. The contact body materials are characterized by a wide range of thermal properties. New contact pairs are proposed and used in the study in order to make the contact bodies’ thermal properties dependent on the behaviour of EHL contact. The colorimetric interferometry method is used to measure the lubricant film thickness and the infrared thermography method is used to observe the temperature distribution in EHL contact. The author presents the assumed mechanism of heat transfer within EHL contact on the basis of different heat transfer mechanisms. The same conditions – such as the Hertz pressure, mean entrainment speed, sliding speed and ambient temperature – are induced for all the contact pair combinations. That is why the differences in the results are attributed to the different thermal phenomena in the contact, caused by the thermal properties of the contact bodies. In the case of contact bodies with a reduced heat dissipation capability, a reduction of the friction coefficient of up to 50 % is observed, which is attributed to an increase in the lubricant temperature, resulting in a decrease in its viscosity. This is confirmed by the infrared thermography method, whereby a significantly higher lubricant temperature is observed in the case of a combination of contact materials with a lower heat dissipation capability.
38

Systémy energeticky úsporných budov / Energy efficient building systems

Hakl, Jaroslav January 2020 (has links)
Content of this diploma thesis is analysis of the operation of heat and cold sources and its evaluation based on data from measurement and control systém and design of a new solution for heating and cooling selected part of the object Otevřená zahrada. Building is located on the street Údolní in Brno. It is a three-storey building serving as offices of non-profit organizations and weekend activities of the organization. On the first floor there is a technical background of the building and half of it is used by four offices. On the second floor there is a seminar hall with a capacity of 50 persons. The rest of the floor is used by three meeting rooms and three offices. The third floor is used by four offices. For the heating and cooling of building, there are designed heat pumps ground-water. Air exchange in the building is provided by the air handling unit.
39

Simulace tepelných ztrát a tepelné zátěže u budovy A1 a analýza opatření na jejich snížení / Simulation of heating and cooling loads of the A1 building and the analysis of energy saving measures

Bartoník, Adam January 2010 (has links)
This thesis deals with the heat loss and the heat loads simulation of A1 building in the area of The Faculty of Mechanical Engineering, Brno University of Technology and with the measures of the energy saving. The measures of the thermo-technical charakteristics for the winter and summer operations are provided on the base of the current state simulation. These measures include increasing of thermal resistence (of the building case), the radiation shielding, the sun blinds and the passive cooling by the night ventilation. All the simulation are performed in TRNSYS 16.1 software.
40

Modelování tepelných procesů letecké elektroniky a problematika jejího chlazení / Thermal phenomena modeling of air electronic unit

Ančík, Zdeněk January 2010 (has links)
This thesis is focus on thermal analysis of aircraft electronic devices and their cooling possibilities. The two analytic methods of thermal analysis are applied on two particular technical objects. The laboratory experiment of non-contact temperature measurement method is applied on real unit. The results of simulation are compared with results of experiment.

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