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Investigation of impact of radiant heating and cooling on car driver thermal comfort
Pavlík, Vojtěch ; Tuhovčák, Ján (referee) ; Fišer, Jan (advisor)
This diploma thesis is focused on the matter of radiation heating, thermal comfort maintenance and setting optimal operation parameters for heating system equipped with radiation panels. The research section summarizes the effects most important for thermal comfort, methods of its determination, heat exchange distribution between the human body and its environment, and technical possibilities of heating car interiors. The central points of this work are the simulation of car interiors heated with radiation panels and the evaluation of thermal comfort with a virtual mannequin. Thermal state was determined via the equivalent temperature and thermal comfort zones diagram (method by O.H. Nilsson). Forty-two simulated scenarios led us to conclude that thermal comfort is not possible to obtain with panels exuding a maximum temperature of 43 °C and the combination of several heat sources is required. Nevertheless radiation heating considerably contributes to energy savings without the loss of thermal comfort in assessed car.
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Car Cabin Aditional Ventilation System Powered by Photovoltaic Panel
Zdvořilý, Vítek ; Pokorný, Jan (referee) ; Fišer, Jan (advisor)
The aim of the Master thesis is to design and verify the function of the system for the ventilation of parked car in the summer season with the intention to cut down the temperature peak in the cabin of the vehicle. The design of the system consists of the suitable placement of the fans and corresponding inlets and outlets for the flowing of the ventilating air. The fans are powered by a photovoltaic panel. The functionality of the system is verified by the measuring of the temperature drop in the cabin of the car. The ambient conditions for the setting of the intensity of solar radiation and of the ambient temperature have been chosen from the real measurements from TUBO station which is meteorological station of the Faculty of Civil Engineering of BUT Brno.
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Glazed Balcony as Preheater of Ventilation Air - Parametric Study
Macháček, Pavel ; Janírek, Martin Stanislav (referee) ; Fišer, Jan (advisor)
This thesis deals with the influence of balcony glazing to preheat ventilation air. In the first part there are described the ways of passive use of sun radiation and types of ventilation of flats. THESEUS-FE 4.0 is used as a simulation program, for which heat transfer is described. The second part contains description of flat and selected case simulation, followed by a geometric model and description of boundary conditions. Finnaly is done evaluation of case simulations not only in therms of savings in ventilation, but also for heat loss as a whole.
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Family house energy requirements audit
Němec, Miloš ; Hejčík, Jiří (referee) ; Fišer, Jan (advisor)
The bachelor’s thesis deals with a comparison of several modifications of the terraced house, which should reduce the final energy requirements. For this purpose National calculating tool is applied, which complies with Czech government regulation no. 148/2007 Coll. In conclusion, individual modifications are evaluated accordely to energy savings and simple return on investments.
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Comparative study of hot water system with photovoltaic and photothermal panels
Junas, Milan ; Tuhovčák, Ján (referee) ; Fišer, Jan (advisor)
The main topic of this bachelor thesis is to compare two methods of water heating that use to the energy acquired by solar photovoltaic and photothermal method for heating. Both systems are in thesis compared in terms of technical, financial and operational performance. As a basis for comparison will serve a photothermal system installed on a family house, which is inhabited by a three-member family. According to the analysis conducted energy consumption for water heating and data PVGIS computational model was created and a photovoltaic system was built, which consists of specific components so as to be able to replace an existing photothermal system and provide much-needed energy for water heating in the family house. Subsequently, a financial comparison of different systems was carried out, from which it is clear that an appropriate choice for the family house is also due to falling prices the photovoltaic system. The PV system prevails not only financially, but also on the difficulty of installation, number of components, the actual maintenance and operating performance.
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Utilization of solar energy for heating and ventilation – solar façades
Mazáč, Ondřej ; Fišer, Jan (referee) ; Jaroš, Michal (advisor)
The objective of bachelor´s thesis „The Usage of Solar Energy for Heating and Ventilation – The Solar Facades“ is the description of nowadays used types of solar facades, the examination of their technical parameters and the estimation of theoretical project on chosen building. The first part is focused on general description of solar radiation, the possibility of its usage in the solar system and and the explanation of its principle. The division of solar facades in terms of their basic criteria is described in the next part. The last part deals with particular estimation of buildings which uses the passive solar system in form of the solar Facade.
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Apparatus for measuring the thermal resistance of the gloves
Pelikán, Jakub ; Fišer, Jan (referee) ; Hejčík, Jiří (advisor)
This thesis deals with common problem health protection at work. Namely hand protection during the work in very cold environment. It’s an analysis of materials suitable for apparatus used for measuring the thermal resistance of the gloves. There was analysed a range of materials. Every single sample was tested for heat conductivity and afterwards was assessed the suitability of materials. Heat was generated by electricity. Ocured heat fields was assessed with thermocamera. After performed experiments of carbon fiber we haven’t reached any satisfying results which we could use for manufacturing of this device. On the other hand kapton film has given very interesting results which we would recommend eventually. Kapton film needs to be modify according to the method listed in the conlusion. This thesis gives us a clear overview and inspiration for additional research of this device. It finds it’s place in research facilities and companies manufacturing protective clothing.
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Design and measurement of a small induction motor
Fišer, Jan ; Klíma, Jiří (referee) ; Mach, Martin (advisor)
This bachelor thesis deals with design and measurement of a small induction motor. The introduction describes a structure and an operating principle of the induction motor. The following part deals with analytical calculation of three-phase induction motor‘s properties. Next are executed an analytical calculations and a finite element method calculations by the Maxwell software. In the end are these calculations compared with results from measurement.
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Space heating and ventilation in a bungalow family house
Menšík, Marek ; Fišer, Jan (referee) ; Charvát, Pavel (advisor)
This diploma thesis deals with design of ventilation and heating of bungalow single-storey house. The work is divided into three parts. In the first part is presented the design of the house with calculation of heat losses. The second part deals with the design, calculations and regulation of the heating of the house. In the third part there is designed a system of forced ventilation for the house.
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Environmental control system of aircraft cabin
Fojtlín, Miloš ; Hejčík, Jiří (referee) ; Fišer, Jan (advisor)
In this research work available information about air-conditioning systems of actual airliners are processed. These systems solve in complexity aircraft cabin microclimate modification into form comfortable and acceptable for the human body (ECS – enviromental control system). The work also covers ECS subsystems description. It explains their function, thermalmechanical principle, different possibilities of their realization and overall ECS function. Examples of ECS negative impact on other aircraft systems are also mentioned. Afterwards, real schemes of ECS built on board are sketched. The paper also presents reasons of ECS introduction, concrete requirements to cabin microclimate out of consideration to safe stay of human bean on board in different flight procedures. Simultaneously technical obstacles and limitations of ECS are shown. In conclusion need of correct ECS function is highlighted.
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