|
|
Thermal calculation of direct fired heater
Sénáši, Martin ; Kilkovský, Bohuslav (referee) ; Jegla, Zdeněk (advisor)
The main aim of the thesis is to evaluete properties of a simplified thermal calculation of the direct fired heater published in the journal Applied Energy at 2010 and its application to specific industrial cases. At first, general issues of process heaters are talk over. Second, calculation model in cited article is briefly introduced. After that, custom computational model at program Maple is created in accordance with published article. Subsequently, the model is applied to the existing process furnaces in the form of a check calculation. An integral part of the work is also a detailed discussion of the results obtained.
|
|
|
Design of heating of primary school
Pánková, Pavlína ; Vyhlídalová, Karolína (referee) ; Horká, Lucie (advisor)
The goal of this master's thesis is to design the heating system for the existing building of an elementary School. The thesis is divided into three parts. In the first theoretical part, I discusses heat transfer methods, the influence of covers on heating elements, and the determination of radiant and convective power components. The second part solves the heating system's design in three heat source variants. The first option comprises six heat pumps. The second option includes a combination of direct evaporation for air handling units and heating using heat pumps. The third option involves the installation of gas condensing boilers. At the end of the second part, a technical report is written and drawing documentation is attached. The last third part is dedicated to the experimental measurement, in which the effect of the front plate on the performance of the heating element was ensured.
|
|
|
Temperature measurement in electric machines
Halfar, Ivo ; Huzlík, Rostislav (referee) ; Janda, Marcel (advisor)
The bachelor's thesis Temperature measurement in electric machines deals with beginning and exuding of the heat of electric motors and measuring of the temperature. The temperature is one of the most important values in diagnostic. High temperature could damage an isolation and it could tend to destroy of the whole machine. The temperature influences their magnetic properties on motors with permanent magnets. If you reach the Curie temperature it could come to its demagnetisation. Measuring of the temperature is important to verify allowable warming of motor or more precisely its spooling. The measuring of the temperature is needed for making motors with minimum of charges and its worth at the end. We could use two methods for measuring the temperature. It is contact and noncontact method. Warming and decomposition of the temperatures it is possible to appoint also with help of theoretic computations which are getting of the method of final elements. A lot of computer programs is using this method. Because of the existence of many sorts of electric motors, one of the viewpoints is the principle of working, another one is the construction. I concentrate on problems of asynchronous motors. In this bachelors thesis I have done theoretical calculation and contact and noncontact method of measuring of warming of the asynchronous motor.
|
|
|
Study efficiency of modern thermal insulation for buildings
Šot, Petr ; auditor, Karel Trojan, Brno, energetický (referee) ; Šťastník, Stanislav (advisor)
The bachelor´s thesis deals with the problem of thermoreflect insulation. The small part of thesis focuses on the energy demand of buildings and its problems. Then the greater extent is analysed problems by heat transfer of material. It includes effects arising from the individual methods of heat transfer and defines the level of expression of individual methods of heat transfer in materials. The thesis presents an overview of experimental methods for determining thermal insulating properties of insulators. Then there is shown a selection of the most widespread insulation materials used in today´s construction. It includes the division of insulators in terms of used materials and subsequent classification of the most used materials in these groups. Another part of thesis deals with the thermoreflect isolation. There are mentioned the necessary concepts for the study of thermoreflect thermal insulation, which include the emissivity surface, the coefficient of mutual radiation and translucency of the material. Then there is described the method heat transfer of thermoreflect isolation. On the next there are presented experimental methods of determining thermal insulating properties thermoreflect thermal-insulating material. The thesis also includes a practical part, which contains the measurement results on a small range of samples taken termoreflection insulators. In the end there is mentioned a brief realization of thermoreflection thermal insulation materials in buildings.
|
|
|
Analysis of Ceiling Heating
Carbol, Ladislav ; Plášek, Josef (referee) ; Vendlová, Lucie (advisor)
Diploma thesis deals with analysis of radiant ceiling heating in VUT dormitories. The work contains a theoretical analysis of radiant and convection heat transmission of ceiling heating. Part of this work is creation of mathematical model for evaluation of variables typical for radiant ceiling heating. Model outposts are compared with data measured on a real building.
|
|
|
Design of air heating system
Nagorskyi, Bogdan ; Baláš, Marek (referee) ; Kracík, Petr (advisor)
This bachelor thesis describes potential possibilities to substitute hot-water radiators with hot-air units with controlled air supply. Introduction part of the thesis describes basic thermal comfort factors. Subsequently, their application in traditional heating systems was performed. After that the issue of conditional heating efficiency of the original heating systems with the simultaneous application of ventilation was discussed, the analysis of which was the reason for the suitability of designing a new system of warm air heating with controlled air supply. The design of the hot-air heating system was performed for the living room of a typical panel apartment unit. During designing a new installation, the emphasis was put primarily on eliminating the main drawbacks of the hot-air heating system, namely the height distribution of the temperature layers. The system was designed in accordance with hygiene standards and its components include other air treatment elements. In the economic evaluation of the project, calculations of the possible implementation of the hot-air system and comparison with similar products commonly available on the market were made.
|
|
|
Verification of thermal-insulation properties of the foil materials
Šot, Petr ; TROJAN,, Karel (referee) ; Šťastník, Stanislav (advisor)
The master´s thesis deals with verification of thermal insulating property of thermoreflection foil insulations. The teoretical part of thesis focuses on the energy demand of buildings, the problems of heat transfer material, terms required for study of thermoreflection thermal insulation and experimental methods for determination of thermal insulating properties of insulators. In the next part the chapter is accompanied by an overview of the most common insulation materials which used in construction. The last part of teoretical part is devoted to the description of thermoreflect formation and analysis of the spread of thermal insulating layers of thermoreflection thermal insulation. The first part of thesis is devoted to the use of thermoreflection therm insulation in buildings. The second part of thesis is devoted to the design, assembly and calibration of the measuring device that uses a method of protected warm chamber. It is declared as a binding method of detection of the heat transfer performance of thermoreflection thermal insulation. The developed measuring device allows detection of endpoints in some direction of propagation of heat. Measurment of heat transfer coefficient devoted the third part of practical part. This part contains a description of the samples used for the measurement of the heat transfer coefficient. In the fourth chapter of the practical part are presented the results of the heat transfer coefficient measurments on selected samples of thermoreflection foil insulation. It is shown the characteristic of heat transfer coefficient of individual samples, the dependence of the heat transfer coefficient on the position of the sample in the measuring device and the recommendation of an appropriate use of sample in the works for the climatic conditions of the Czech republic. The work concludes the chapter of comparing and evaluating of all samples with practical recommendations.
|
|
|
Heat processing principle of operation thermal resistance annealing.
Špičková, Petra ; Humár, Anton (referee) ; Kalivoda, Milan (advisor)
The project assigned for the bachelors study program B 2307 analyses the theory of heat processing in general and furthermore resistance annealing with the focus on the technology developed by the company Heatmasters. Examples of processing methods used at other technology providers are presented, inclu-ding documentation and datasheets. Resistance annealing is based on the heat transfer from a resistive wire, which heats up by electrical current. The thermal energy is then transferred to the target material through heat radiation or con-ductance. The resistance heat processing is used both for welding and for an-nealing. Nowadays is the documentation and recording of the heat processing of significant importance. Possibilities exist that allow recording of temperature during the entire cycle of the heat processing and subsequently providing the result evidence in a form of a certificate.
|
|
| |
|
|
Design of air heating system
Nagorskyi, Bogdan ; Baláš, Marek (referee) ; Kracík, Petr (advisor)
This bachelor thesis describes potential possibilities to substitute hot-water radiators with hot-air units with controlled air supply. Introduction part of the thesis describes basic thermal comfort factors. Subsequently, their application in traditional heating systems was performed. After that the issue of conditional heating efficiency of the original heating systems with the simultaneous application of ventilation was discussed, the analysis of which was the reason for the suitability of designing a new system of warm air heating with controlled air supply. The design of the hot-air heating system was performed for the living room of a typical panel apartment unit. During designing a new installation, the emphasis was put primarily on eliminating the main drawbacks of the hot-air heating system, namely the height distribution of the temperature layers. The system was designed in accordance with hygiene standards and its components include other air treatment elements. In the economic evaluation of the project, calculations of the possible implementation of the hot-air system and comparison with similar products commonly available on the market were made.
|
guest ::
