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Application of refrigerant cooling for air conditioning of buildings
Vlček, Petr ; Rubina, Aleš (advisor)
Diploma thesis deals with the problem of refrigerant cooling needs for air conditioning systems of buildings. Summary focuses on the theoretical basics and the physical nature of refrigeration and air conditioning technology. The consequences of split unite on microclimate in the room was experimentally tested and simultaneously investigated happenings associated to its activity. The aim is to unify the theoretical and experimentally obtained facts and apply them in the designing of air conditioning units. Design of air conditioning systems builds on my bachelor thesis, "Hot-air heating of gym", which subject was the ventilation system of gym.
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Thermodynamics of ideal gases in Matlab
Zábojník, Jakub ; Klimeš, Lubomír (referee) ; Štětina, Josef (advisor)
In terms of bachelor’s thesis a toolbox of functions for basic computing in thermodynamics with ideal gases and their mixtures was built in environment of computer program MATLAB. Source code of these functions and their description are parts of this thesis. Among others fundamental characteristics of thermodynamic values and terms on which the creation of functions was built, and instruction for calling of functions are mentioned here. Functions in toolbox imaginary are divided to some groups. This dividing is results from principle of thermodynamic calculation. Functions from two neighbouring groups are directly tied together. For lucidity of function sequences and for functions usage and toolbox explanation the examples of using functions examples of functions usage in specific thermodynamic calculations.
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Steam-gas cycle from a thermodynamic viewpoint
Pransperger, Jan ; Štětina, Josef (referee) ; Jaroš, Michal (advisor)
This thesis deals with thermodynamic of steam-gas cycle and compare that with some others heat cycles. It focuses on efficiency of cycle and its limits in the context of the second thermodynamic low. Also it shortly summarizes some technical solutions and possibilities of the cycle. The mentioned knowledge are applied to concrete example of Brno’s heat and power plant Červený mlýn (Red mill) in the last part and allow assessment of its efficiency.
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Study of interactions of organic matter and its components via molecular dynamics
BARVÍKOVÁ, Hana
Humic acids and humates are principal components of humic substances major organic constituents of soil, peat, coal and water around the world. I was involved in research into molecular dynamics simulations of interactions of quartz surfaces with aqueous solutions of ions and small organic molecules representing basic building blocks of larger biomolecules and functional groups of organic matter. We studied interactions of molecules with surfaces for a set of surface charge densities corresponding to the experimentally or environmentally relevant ranges of pH values employing molecular mechanics, molecular dynamics and ab initio techniques. Simulated quartz surfaces covered the range of surface charge densities 0.00, -0.03, -0.06 and -0.12 C-m-2, approximately corresponding to pH values 4.5, 7.5, 9.5 and 11. As model molecules, benzoic acid, phenol, o-salicylic acid and their conjugated bases were chosen. My task was to prepare topologies and parametric models of selected organic matter basic building blocks organic molecules. I focused on studying interactions of these molecules in an aqueous environment with mineral surface quartz. The aim was to process simulation results and analyse conformations of the adsorption complexes and their thermodynamic properties such as interaction energies, free energies and adsorption geometries.
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Mathematical apparatus of thermodynamics
TESAŘOVÁ, Jaroslava
This Thesis deals with the use of the mathematical apparatus in thermodynamics, specifically the use of Calculus of functions of several variables. The main emphasis is placed on creating a mathematical derivation of the theoretical foundations of thermodynamics, for example Maxwell relations. The following thing explains the linear differential forms with the help of them the laws of thermodynamics are defined. In the Thesis there are examples with solution to illustrate mathematical procedures. To understand this Thesis the knowledge of Calculus is required.
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Thermodynamic and transport properties of ordinary water substance
Mareš, R. ; Šifner, Oldřich ; Královec, J.
A brief review of the internatonal temperature scales and its mutual conversion aids are presented. Shortly is discussed the development of new standards for the transport properties.The introduction of the new internationally adopted industrial formulation IAPWS-IF97 in the nuclear engineering practice is emphasised. Available sources of the formulation are given. Mentioned are new backward equations and TTSE method. The state in the field of the thermophysical properties of heavy water is summarized.
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