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Insulation influence on heat consumption
Gregor, Jiří ; Bokišová, Lenka (referee) ; Hejčík, Jiří (advisor)
The aim of this bachelor thesis is to analyzethe energy budget of a house before and after heat cladding and to assess whether the heat cladding is perspective, if the invested money returns and to show the main advantages and disadvantages of cladding. Measured values from 1992 to 2012 are used in this thesis. Heat cladding in our house was done at the turn of 2003-2004 and in the same yearsthe old wood windows were replaced with new plastic ones.
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Autonomous differential equations
Bokišová, Lenka ; Vodstrčil, Petr (referee) ; Opluštil, Zdeněk (advisor)
This bachelor's thesis is concerned with solution of autonomous dierential equations. Attention is devoted to the basic mathematical models of population growth of single species. It is here mentioned Malthus model, model with intraspecic competition and analyzed the model of population growth under predation. The acquired knowledge is applied to specic mathematical models of sheries. Here are distinguish cases where shing is a constant and depends on the size of the population. Moreover, it is studied the model of shing of sardines with special growth function. In each model is dealt with the question of stability of stationary solutions.
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Heat transfer surfaces design and fouling of the heat exchangers from hollow plastic fibers
Bokišová, Lenka ; Dohnal, Mirko (referee) ; Raudenský, Miroslav (advisor)
This thesis studies a possibility of using hollow fibres for construction of innovative heat exchangers. The first part introduces to the field of heat exchangers and polymers as materials suitable for formation of heat transfer surfaces. Further, the potential of hollow fibres of small diameters is outlined, including the merits, limits and proposals for improving. The significant part of the work is dedicated to the review of methods of fibres fixation and separation and review of fouling and cleaning of heat exchangers. Overviews of design possibilities which prevent fibres clustering have been made. The solutions, which are prepared for experimental research at Heat Transfer and Fluid Flow Laboratory are stated, including analysis of “curly” fibres application. The next part presents calculations for models of water – water and water – air heat exchangers and discusses influence of fibre diameter, flow velocity and the other parameters on heat characteristics. The heat transfer and fluid flow formulas using for heat exchangers of a bigger order can be employed with small changes. Furthermore, the influence of hollow fibres arrangement and distances on heat transfer is discussed.
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Heat transfer surfaces design and fouling of the heat exchangers from hollow plastic fibers
Bokišová, Lenka ; Dohnal, Mirko (referee) ; Raudenský, Miroslav (advisor)
This thesis studies a possibility of using hollow fibres for construction of innovative heat exchangers. The first part introduces to the field of heat exchangers and polymers as materials suitable for formation of heat transfer surfaces. Further, the potential of hollow fibres of small diameters is outlined, including the merits, limits and proposals for improving. The significant part of the work is dedicated to the review of methods of fibres fixation and separation and review of fouling and cleaning of heat exchangers. Overviews of design possibilities which prevent fibres clustering have been made. The solutions, which are prepared for experimental research at Heat Transfer and Fluid Flow Laboratory are stated, including analysis of “curly” fibres application. The next part presents calculations for models of water – water and water – air heat exchangers and discusses influence of fibre diameter, flow velocity and the other parameters on heat characteristics. The heat transfer and fluid flow formulas using for heat exchangers of a bigger order can be employed with small changes. Furthermore, the influence of hollow fibres arrangement and distances on heat transfer is discussed.
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|
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Insulation influence on heat consumption
Gregor, Jiří ; Bokišová, Lenka (referee) ; Hejčík, Jiří (advisor)
The aim of this bachelor thesis is to analyzethe energy budget of a house before and after heat cladding and to assess whether the heat cladding is perspective, if the invested money returns and to show the main advantages and disadvantages of cladding. Measured values from 1992 to 2012 are used in this thesis. Heat cladding in our house was done at the turn of 2003-2004 and in the same yearsthe old wood windows were replaced with new plastic ones.
|
|
|
Autonomous differential equations
Bokišová, Lenka ; Vodstrčil, Petr (referee) ; Opluštil, Zdeněk (advisor)
This bachelor's thesis is concerned with solution of autonomous dierential equations. Attention is devoted to the basic mathematical models of population growth of single species. It is here mentioned Malthus model, model with intraspecic competition and analyzed the model of population growth under predation. The acquired knowledge is applied to specic mathematical models of sheries. Here are distinguish cases where shing is a constant and depends on the size of the population. Moreover, it is studied the model of shing of sardines with special growth function. In each model is dealt with the question of stability of stationary solutions.
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