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Heating options of a house
Veselý, Přemysl ; Baláš, Marek (referee) ; Toman, Filip (advisor)
The bachelors thesis deals with the topic of heating possibilities of family houses. The work is divided into two parts. The first chapter deals with the search for heat sources used in local central Europe conditions. The practical part deals with economic calculation and economic assessment for used heat sources. Its aim is assess the correct economic intensity of resources used for different family houses, divided by heat loss.
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Diaphragm pump
Veselý, Přemysl ; Dobšáková, Lenka (referee) ; Pochylý, František (advisor)
The central goal of this work is to optimize the performance of the diaphragm pump so that it is able to operate under the given conditions, which at this moment do not meet. In the first part of the thesis, a basic research was created about diaphragm pumps, their simple division, inclusion in positive displacement pumps and the history of their development. In the following chapter, their construction and the meaning of each part of the machine was described in detail. Furthermore, several basic CFD calculations were carried out with the aim of locating the places with the greatest hydraulic losses. These analytical calculations were subsequently compared with practical experiments, from which the intention was derived. In the next point, based on these facts, several final adjustments were made with the aim of optimizing the performance of the entire system. After that, these design measures were further investigated and evaluated.
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Pilový kotouč v procesu podélného řezání materiálů na bázi dřeva
Veselý, Přemysl
In this dissertation thesis there is listed characteristics of circular saw blades, their distribution, influence of construction adjustments on final behavior of blade in the process of machining, problematic of oscillation of blades a mutual interaction among quality of machined surface, noise and dust. The thesis covers the problems of oscillation of circular saw blades as when idling and operating - the cutting process; and by the use of three circular saw blades with different construction modifications. These aforementioned construction measures are also compared to each other due to the implementation of standard construction saw blades not only from the perspective of oscillation, but also from the perspective of the roughness of the machined surface and the analysis of wood waste generated during cutting and noise. In the theoretical part there is an analysis of available literature and scientific theses. It outlines the particular publications devoted to methods of determining the shapes of oscillation, determining critical, resonant and recommended speed, blade constructions, including possible modifications, the theory of cutting saw blades including determining the size and shape of the splints and the effects of noise on the work environment. An important part of this work is methodology involving direct measurements for detection of unstable states of discs (resonance and critical speed. In this section it is further evaluated measuring of the oscillation of the test saw blade and verification of the proposed methodology with a different and practiced, commonly known method, so called cold shapes: The author also seeks to explore and determine the effect of different tooth pitch and method of execution of slots along with soundproofing grooves on noise levels, the resulting quality of the machined surface of various wood. The generated waste is then analyzed for splitting wood particles in particular size group with the percentage of each chip. The results of the experiment are in discussion confronted with the available scientific theses, taking into account with normal operating conditions, of which the conclusion is drawn.
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Heating options of a house
Veselý, Přemysl ; Baláš, Marek (referee) ; Toman, Filip (advisor)
The bachelors thesis deals with the topic of heating possibilities of family houses. The work is divided into two parts. The first chapter deals with the search for heat sources used in local central Europe conditions. The practical part deals with economic calculation and economic assessment for used heat sources. Its aim is assess the correct economic intensity of resources used for different family houses, divided by heat loss.
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Pilový kotouč v procesu podélného řezání materiálů na bázi dřeva
Veselý, Přemysl
In this dissertation thesis there is listed characteristics of circular saw blades, their distribution, influence of construction adjustments on final behavior of blade in the process of machining, problematic of oscillation of blades a mutual interaction among quality of machined surface, noise and dust. The thesis covers the problems of oscillation of circular saw blades as when idling and operating - the cutting process; and by the use of three circular saw blades with different construction modifications. These aforementioned construction measures are also compared to each other due to the implementation of standard construction saw blades not only from the perspective of oscillation, but also from the perspective of the roughness of the machined surface and the analysis of wood waste generated during cutting and noise. In the theoretical part there is an analysis of available literature and scientific theses. It outlines the particular publications devoted to methods of determining the shapes of oscillation, determining critical, resonant and recommended speed, blade constructions, including possible modifications, the theory of cutting saw blades including determining the size and shape of the splints and the effects of noise on the work environment. An important part of this work is methodology involving direct measurements for detection of unstable states of discs (resonance and critical speed. In this section it is further evaluated measuring of the oscillation of the test saw blade and verification of the proposed methodology with a different and practiced, commonly known method, so called cold shapes: The author also seeks to explore and determine the effect of different tooth pitch and method of execution of slots along with soundproofing grooves on noise levels, the resulting quality of the machined surface of various wood. The generated waste is then analyzed for splitting wood particles in particular size group with the percentage of each chip. The results of the experiment are in discussion confronted with the available scientific theses, taking into account with normal operating conditions, of which the conclusion is drawn.
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