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Dry ice blasting for surface cleaning
Horňák, David ; Konečná, Eva (referee) ; Máša, Vítězslav (advisor)
This Bachelor thesis deals with dry ice blasting, which belongs to modern and effective surface cleaning methods. The websites of various manufactures clearly state that this method is utilized in many industries, but there is a low number of research articles dealing with this cleaning method. The amount of literature that covers the usage of this method in certain industries is also insufficient. For this purpose, systematic overview of dry ice blasting applications in industry is presented based on thorough review of literature. The technology of dry ice blasting including dry ice blasting machine and its individual equipment is also closely introduced. The thesis also includes the characteristic case study of high energy and economic intensity of this process. This study states that 94 % of cleaning expenses is linked with consumption of dry ice. The effective dry ice management is necessary from the economic point of view. Suggested saving measures follow on from these facts. These measures are: • process automation • custom applications • compressor optimization • replacement of compressed air with different form of energy Implementation of these saving measures can help greater extension of dry ice blasting in industrial practise.
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The energy intensity of water acquisition by condensation of air humidity
Hamerský, Tomáš ; Škorpík, Jiří (referee) ; Pospíšil, Jiří (advisor)
The master's thesis deals with actual possibilities of acquisition water from air humidity in order to obtain fresh water, focusing on energy intensity of vapor-compression refrigeration for it is production. There is a basic determine study for Czech climatic zone in selected localities. For graded cooling capacity dependencies describing the acquisition of water from the air, where is the energy intensity ranges on average between 0,3 ÷ 0,5 kWh/l. For the selected family house are set the individual variants of non-potable rainwater management.
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Recycling plants in the Czech Republic
Průžková, Kateřina ; Kropáč, Jiří (referee) ; Gregor, Jiří (advisor)
This bachelor thesis is focused on recycling the municipal waste components (glass, paper, plastic). First part of the thesis contains a research into the current state of the waste management and its collection technologies. The following chapter consists in description of the waste components, their recycling and utilization as secondary raw materials including resource efficiency during the plastic recycling. The next part of the work comprises the list of recycling plants, which is sorted by the type of the waste processed. A separate chapter is focused on the technology of the plastic processing recycling line and its energy intensity. Subsequently, the cost of this recycling line and its components is introduced.
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Technical and economic evaluation of the gas microturbine with the waste heat recovery system
Slovák, Rostislav ; Kilkovský, Bohuslav (referee) ; Máša, Vítězslav (advisor)
The use of gas microturbines as a primary unit in CHP is still weak in the industrial process. It gives the driving force to the main aim of this master thesis, which is the technical and economic evaluation of the gas microturbines waste heat recovery system, which is the key factor for their economic sustainability. Assignment contains description of CHP system that was gradually built in LENP laboratory, part of NETME Centre. The author has joined the final work before start-up of the CHP system. He presents and describes results of the first experiments on this unit. The flue gas of a microturbine was used for heating water by heat exchanger flue gas–water and for direct linen drying. The case study of laundry with capacity 10 tons per shift was developed in cooperation with companies in laundry care. Results of those tests were used to process integration and utilization of this professional industrial laundry All obstacles found and opportunities of the use of microturbines are comprehensively described and tested in case studies, which are simulated in Chemstation Chemcad Software. Results of the thesis are expected to be useful these fields: the use of gas microturbines in industry & energy savings in industrial laundries.
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Assessment of the Return on Investment in Insulating a Residential Building in a Selected Area
Vyhnálek, Václav ; Procházka, Pavel (referee) ; Tesařová, Zdeňka (advisor)
The diploma thesis deals with the impact of insulation of a residential building on the price of apartment buildings and the payback period of investments in thermal insulation. The theoretical part deals with the topic of energy intensity, methods of thermal insulation and valuation. In the second part of the thesis, the values of selected apartment buildings are determined by the direct comparison method and the time of return of investment in thermal insulation. In addition, the thesis deals with energy saving depending on thermal insulation. The aim of the thesis is to determine whether and how much will increase the price of an apartment house or housing units due to additional thermal insulation, what are the savings for heat and what is the period of return to investment.
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Multifunctional house in Karlovy Vary
Růžička, Jiří ; Vlček, Ing Karel (referee) ; Vlček, Milan (advisor)
The project solves a multifunctional Duma building in a vacant lot, contemplated the construction site is located in Carlsbad, in the street Vyhlíce. This is a protected site spa. Part of the project's layout and structural design of the house. It is a six-storey house with an attic and a basement floor. It is designed as a free-standing in the gap as the final house. The layout is divided into two complete units with their own input. There are spaces for business and residential units for permanent housing. Part of the living area are also room house equipment. Inputs to both parts are wheelchair accessible. The house is not wheelchair The house is designed as a brick building of brick masonry Porotherm the module dimensions of 250 (125) mm with reinforced concrete ceilings. Roofed by a hipped roof. The house is located on a private plot of 519 m2 built-up area of 221 m2. The land is gently sloping. The main orientation of the building to the cardinal's east and west. The south wall is adjacent to the neighboring house.
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Energy Intensity Reduction of a Professional Laundry Care Process
Bobák, Petr ; Klemeš,, Jiří (referee) ; Noskievič, Pavel (referee) ; Stehlík, Petr (advisor)
Doctoral thesis deals with professional laundry care process and reduction of energy intensity and use of other operational commodities used in the process. Professional laundry care process is a specific energy intensive process; its purpose is to re-establish original properties of the now dirty laundry so that it may fulfil its functions again. This is basically a recycling and regeneration process comprising many sub-operations. Key operation is washing of the laundry in a washing bath, which removes impurities from the laundry. This thesis describes the most common technology of impurities removal, which is washing in a hot washing bath in cooperation with mechanical work and detergents. However, all of the described procedures may also be applied on alternative technologies, such as ozone washing, washing with low-temperature enzymes and ultrasound. Water is applied in all these technologies as a soaking agent. Water must have appropriate properties and must be removed from the laundry after the washing process in subsequent operations (drying, ironing, and pressing). Theoretical introduction of the thesis describes professional laundry care process in detail, and continues with mathematical modelling of the process and its main sub-operations (washing, drying) using mass and heat balance, and data acquisition and their application in research and development. Thesis further describes design of information system on the basis of relational database controlled by web application. This system enables to organize data and information from various sources – measured experimental data, data concerning measurement devices, operational records of machines, etc. Thesis further proposes how to evaluate and reduce energy intensity of a process. Descriptions are validated by examples and case studies. Key section of the thesis is a chapter describing experimental infrastructure. This infrastructure integrates several instalments of laundry equipment and is a fully functional operation of industrial laundry facility with 500kg/shift capacity, which serves as a model of energy intensive process. Sophisticated infrastructure and data acquisition system allows measuring wide spectrum of physical entities and examining factors influencing energy intensity of processes, and relationships between these factors as well as effectiveness of various savings measures in real life facilities.
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Anlysis of the Effect of Insulation on the Price of Flats in Žďár nad Sázavou
Dvořák, Jan ; Hlavinková, Vítězslava (referee) ; Kubičková, Veronika (advisor)
This thesis analyzes the impact of insulation on the price of flats in Zdar. In the theoretical part of the thesis deals with the theme of energy demand and pricing. The second part sets the prices of selected flats in different valuation methods, namely: direct comparison method, comparative method and cost method. Furthermore, the work deals with energy conservation, depending on the thermal insulation. The aim is to determine whether and by how much prices will rise flats due to the additional insulation, what are the savings in heat and what about payback to investment.
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PENB Impact on the Price of Real Estate
Lukeš, Martin ; Lorencová, Marie (referee) ; Pertl, Marek (advisor)
This thesis deals with current topics of today, such as the issue of valuation of real estate and energy performance of buildings. The content is divided into a theoretical part where the first general and then specifically looks at the issue, and the practical part, which contains the calculations for determining the price of the selected house by direct comparison and cost methods by decree. It also specifies the energy performance of the house in its current state, and after the thermal insulation. Orientation also the return on the investments made from the perspective of the investor. The aim of this study is to assess the extent to which there is an increase in the price of a house due to the thermal insulation.
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Analysis of the influence of insulation on the price of housing units in Opava
Adamus, Aleš ; Pertl, Marek (referee) ; Hlavinková, Vítězslava (advisor)
This dissertation analyzes the effect of insulation on the price of housing units in Opava city. In the theoretical part of the dissertation deals with the subject of appraisement, the energy intensity of buildings and technical-economic evaluation. In the practical part sets the prices of selected housing units by direct comparison, the comparative method by regulation and yield value. It assesses whether the possible range in the valuation regulations (5%) reflects the fact that the recognized building insulated in accordance to the current legislation. It detects the energy nature of a apartment building in which they are placed selected apartments. The goal is to determine a price increase of housing units due to insulation and evaluates the appropriateness and inappropriateness of buying from the investor's perspective.
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