National Repository of Grey Literature 125 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Heat-Hydraulic Design of the Exchanger for the Test Device
Únar, Jan ; Toman, Filip (referee) ; Kracík, Petr (advisor)
This bachelor thesis deals with the design of tube exchanger for testing device. The exchanger will serve to heat or cool the flowing air to the desired value. The heating / cooling medium flowing in the tubular space is water. The first part describes the functions, distribution, requirements and current trends of heat exchangers. The second part consists of thermal and hydraulic calculations for the variant of bare tubes and finned tubes and evaluation of results. The result of this work is a design of a tube exchanger, which has the shape of a square type channel for both variants.
Load tests of non-IT parts of data centers
Víteček, Aleš ; Mačák, Martin (referee) ; Vyroubal, Petr (advisor)
The thesis "Load testing of non-IT parts data centers" deals with the theoretical analysis of data centers with a focus on non-IT part and theoretical preparation for measuring stress tests focused mainly on cooling. The theory is followed by a practical part of the PEC measurement by CATEGORY a.s .. This sample measurement carried out at the company premises clearly outlines the importance of performing similar tests. The measurement is thoroughly evaluated and suggestions are made to improve the operation. The next part of the practical part contains simulation of sample measurement. This simulation serves as a convenient addition and comparison. Also this simulation, the importance of similar stress tests can be justified.
Measuring and Control System for Heat Pump
Ščepka, Ondrej ; Morávek, Jan (referee) ; Mastný, Petr (advisor)
This master thesis describes the issue of the measuring and control system for the heat pump. In the first part of the thesis is described the principle of heat pump activity, its basic components. The second part contains the distribution of heat pumps according to the method of obtaining and transferring the heat. The following chapter contains the description of system status before the modernization. In the practical part of this thesis is the proposal and realization of new control and monitoring system including the description of individual components. In the conclusion of the thesis is a verification of the use of proposed control and monitoring system of heat pump for the measuring of its operational characteristics.
Study of transverse velocity field in the vicinity of rotating wheel with assumption of forced convection of disc brake
Regner, Dominik ; Polanský, Jiří (referee) ; Štefan, David (advisor)
The master thesis deals with the influence of a local change of temperature due to advection from disc brake to axial velocity field close to the rotating wheel of a car. The second goal is to set parameters applicable to various wheel discs and study of the influence of these parameters to aerodynamical properties of car and thermodynamical properties of the disc brake. The thesis is numerically executed in StarCCM+. The first part focuses on theoretical background about the numerical solution and current status of research. There are described disc parameters, geometry input and solver settings in the second part. The final part deals with a comparison of velocity fields for isothermal and thermodynamical model and evaluates the influence of parameters to velocity field, aerodynamical drag and thermodynamical performance of the brake.
Analysis of the heat utilisation from biogas stations for heating
Kareš, Martin ; Lisá, Hana (referee) ; Milčák, Pavel (advisor)
This bachelor thesis deals with the analysis of the use of heat from biogas stations. The first part describes the production of biogas, its combustion efficiency and the development of energy production thus obtained. In the second part it deals with individual solutions of the application of heat produced and in the last chapter it analyses the balance of the specific solution of heat transfer and its impact on the environment.
Studium vedení tepla metodami počítačového modelování
This diploma thesis is concerned with a problem of the line heat simulation by different kinds of materials with computer - aided COMSOL Multiphysics. The thesis is composed of three thematic units. In the first part there is a line heat principle shortly described and his basic physical quantities which are necessary for correct defining of the simulation. The second part is concerned with the software, its function, auxiliary modulus and a description of single actions, which are essential for making of the model. In the last part there is the whole process of the multiphysical task creation that enables to simulate line heat in a specific material in reliance on time.
Heat exchanger design
Para, Marcel ; Chýlek, Radomír (referee) ; Špiláček, Michal (advisor)
This final thesis deals with the design of the water-water heat exchanger, which is part of the cooling circuit. It contains a detailed thermal and hydraulic calculation. The work also includes a basic construction drawing.
Assessment of the measure reducing heat loss residential building
Vašíř, Jan ; Chýlek, Radomír (referee) ; Baláš, Marek (advisor)
Objectives of this thesis are analysis of measurements to decrease energetical consumption of buildings and efficiency calculation of measurements made to concrete apartment building. Thesis is thematically devieded into for parts. First part is theory determinating baisic therminology. Heat conduction and its meaning for heat loss in houses is described in this part. In second part is described meaning of thermal insulation and contains analysis of market with materials including suitability of materials for thermal insulation and windows. In third part is described house which is examined in the thesis. Last fourth part contains calculation consumption of heat and examines why was not fulfiled assuption of designed savings. Financial calculation of how much money was saved and when the investmen was retruned. In this part is also estimated mass of CO2 gas emited by thermaly insulated house versus state in which house is not thermly insulated.
Optimation and Innovation of Family Houses Heating
Vafek, Petr ; Špiláček, Michal (referee) ; Lisý, Martin (advisor)
The aim of this bachelor thesis is to resume present types of heating in the family houses including new modern types, which gradually supply old unsuitable heating sources. Further, these types are compared and in the last part a technical-economical proposal of heating source for model house is made.
Increasing the energy efficiency of industrial heating plant
Spišák, Lukáš ; Lisý, Martin (referee) ; Kracík, Petr (advisor)
This bachelor thesis consists of two parts. The introductory chapters are devoted to the basic description of cogeneration and trigeneration technologies, focusing on the description of cogeneration units and cooling devices. The second part of the thesis compares two specific ways of using cogeneration units and gas boilers in the CHEMOSVIT ENERGOCHEM a.s. in the town Svit. Subsequently, both variants are evaluated energetically and economically.

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