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Design of modular tubular heat exchanger
Marx, Sven ; Turek, Vojtěch (referee) ; Jegla, Zdeněk (advisor)
Hlavním cílem této práce je seznámit se s požadavky specifické procesní aplikace a návrhem výměníku tepla s křížovým tokem pracovních látek a zhodnotit návrh předmětného výměníku pomocí simulačního softwaru. Nejprve jsou v práci prozkoumány provozní podmínky rekuperace odpadního tepla a obecné možnosti návrhu a jsou uvedeny základní rovnice pro tepelný a hydraulický výpočet. Hlavní část práce se zaměřuje na modulární trubkový výměník tepla s křížovým tokem pracovních látek navržený pro experimentální výzkum rekuperace tepla a zanášení ze znečištěných spalin produkovaných spalováním alternativních paliv na VUT v Brně (VUT) na Ústavu procesního inženýrství (UPI). Nejprve je stručně představena situace v testovací laboratoři. Poté je popsán postup návrhu předmětného tepelného výměníku pomocí softwaru HTRI a výsledky jsou shrnuty a porovnány s cílovými požadavky. Následně je analyzována distribuce toku vody v trubkovém prostoru uvnitř jednoho ze čtyř identických modulů výměníku tepla užitím softwaru CDF pomocí tří různých simulačních přístupů. Jsou popsány dva přístupy využívající model turbulence k--SST a jeden přístup využívající model turbulence k--Realizable turbulence. Nakonec jsou diskutovány rozdíly mezi přístupy a výsledky simulací distribuce toku.
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Application and evaluation of energy enthalpy heat exchanger
Jetelina, Michal ; Horák, Petr (referee) ; Uher, Pavel (advisor)
This master thesis is solving measuring the efficiency heat recovery and application unit, which includes heat recovery into selected building. In the first part of the thesis are analy-zed the different types of heat recovery system, their behavior and suitability of use in HVAC systems. The second part includes the actual experiment, when were measured parameters of air, which passed through the unit and then were analyzed the results. In the last part, third, was measured unit applied to the selected house and was compared to operation of the unit in case of use by the producer given unit parameters and measured parameters.
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Heating and ventilating of low-energy and passive houses
Jankola, Mario ; Musil, Zdeněk (referee) ; Jaroš, Michal (advisor)
The Bachelor's thesis focuses on heating and ventilation of low-energy and passive houses. The beginning chapters describe and explain basic principles of these buildings and basics of air-handling systems. The main part of the work overviews contemporary heating and ventilation systems while pointing out their advantages and disadvantages. The last chapter consists of realistic blueprint for low-energy family house, including specifications on heating and ventilation systems, as well as evaluation of their efficiency.
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Heat exchanger design for closed gas turbine cycle
Sklenář, Oldřich ; Bogdálek, Jan (referee) ; Šen, Hugo (advisor)
This bachelor’s thesis deals with determination of parameters of an experimental high temperature gas-cooled nuclear reactor cycle and a project of a regenerative heat exchanger designed to this cycle. The first part is dedicated to thermal cycles. This part includes an actual summary of high temperature reactors, an analysis of their cycles, a theory of closed gas turbine cycle and a calculation of elected cycle. The second part concerns a review of heat exchangers and gas coolers used for nuclear energy purposes and heat transfer theory. The main objective of this part is a calculation of heat exchanger from the conceptual, thermal, hydraulic and strength point of view including inclusion of analysis of this solution.
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Special education centre
Gilbert, David ; Stránská, Zuzana (referee) ; Struhala, Karel (advisor)
The aim of my master's project is to design a new building of a Special education centre with nearly zero energy consumption. The project consists of three main parts. The building is designed with a green flat roof with a load-bearing part formed by prestressed ceiling panels. The load-bearing wall masonry consists of ceramic blocks with stone wool insulation panels with longitudinal fibres. The building is divided into two main parts connected by a connecting entrance hall. First department is used mainly for therapy rooms and the other department for the offices of special pedagogical staff. The building also contains photovoltaic panels, air-handling units with heat recovery and a rainwater storage reservoir with the possibility of using rainwater for flushing. The next part of the master's project deals with the assessment of the life cycle of the structure (LCA), where the subject of assessment are various types of floor structures.
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Energetic utilization of wastewater
Žáček, Jan ; Raček, Jakub (referee) ; Hlavínek, Petr (advisor)
Diploma thesis presents various methods of energetic utilization of wastewater. It shows that wastewater is source of heat energy that has not been used yet. The thesis focuses mainly on heat recovery from wastewater from sewer bypass by modular heat exchangers. Design of heating of polyfunctional building from bypass from main sewer in Brno is developed. The main finding is that wastewater as low potential source of energy can together with heat pump be not only used for heating and heating of domestic hot water but also for cooling of polyfunctional object. Part of work is also technical-economical assessment by the NPV method.
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Technology of wastewater reuse
Velikovská, Kristýna ; Raček,, Jakub (referee) ; Hlavínek, Petr (advisor)
This diploma thesis presents the knowledge of wastewater reuse. The theoretical part of the thesis describes types of wastewater (greywater, brownwater, and yellow-water) and their characteristics. Further, the theoretical part describes the possibilities of re-use of wastewater as a source of water in detail, including treatment technology, and the heat recuperation from wastewater. The practical part of the thesis uses gained knowledge for designing a greywater treatment and heat recovery technology of grey water in an apartment complex.
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Nursery school in passive standard
Výtisk, Jiří ; Hudec, Mojmír (referee) ; Sedlák, Jiří (advisor)
Subject of this diploma thesis is a new building of nursery school in passive standards. The school has two floors. On both floors there are build two classes, each for twenty children. Structure is based on strip foundations and load-bearing walls are made from sand-lime blocks. The horizontal load-bearing structures are from cast-in-place reinforced concrete. School has green flat roof and above atrium has sloped roof. The shape of building is made by three circle segments with different radius. Ventilation of the building is ensured by heat recovery ventilation unit. Project is situated into an urban area of Brno, nearby the city center, on brownfield plot.
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Implementation of the air-ground heat exchangers in condition of the Czech Republic
Macenauerová, Tereza ; Musil, Zdeněk (referee) ; Kolbábek, Antonín (advisor)
This work presents the implementation of ground heat exchangers for air-conditioning systems of buildings in the Czech Republic, especially in south Moravia. The purpose is to find basic information about specific devices - such as the type of heat exchanger, material of pipeline, the method of suction (filtration), outlet of condensate, etc. These are parameters that investor can decide before the realization. Exercise equipment is dependent on the parameters that investor can not decide (eg. type of soil, disposition of land, surrounding climate). The work is based on a questionnaire study (part of junior project FSI-J-12-24) form 2012 which was solved with concrete owners of realized devices. A part of the ground heat exchangers comes from the implementation of energy-efficient houses KARON s.r.o. company, the basic parameters of the these exchangers are provided by its managing director Ing. Stanislav Karasek. Other devices have been traced in the database of passive houses in the Czech Republic - managed by the Passive House in Brno. The work summarizes some of knowledge of owners, shows the most often used types and values the importance of proper design of the whole device.
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The Analysis of the Possibilities of Using Heat Energy for Water Heating, Space Heating and Air Conditioning in the Domestic Sector
Almabrok, Almabrok Abdoalhade ; Dvorský, Emil (referee) ; Santarius, Pavel (referee) ; Toman, Petr (advisor)
Rostoucí světová poptávka po méně efektivních zdrojích energie vede ke zvýšení zájmu o kogenerační technologie v sektoru domácností. Pomocí této technologie lze významně snižovat množství znečišťujících látek emitovaných při výrobě elektřiny a tepla pro domácnosti. Kogenerační systémy v sektoru domácností nabízí možnost produkce jak užitného tepla a elektřiny z jednoho zdroje paliva, např. motorové nafty či zemního plynu. Tato práce se zaměřuje na analýzu možností užití kogeneračních a tri-generačních technologií ke zlepšení efektivity využití primárního zdroje energie, zejména v zemích severní Afriky. První část práce se orientuje na obecné definice v oblasti elektroenergetiky, aktuální i budoucí výhled energetické bilance v Libyi. Následující kapitoly se věnují kogeneračním a tri-generačních systémům, jejich charakteristikám se zaměřením na technické parametry, výhodám a nevýhodám těchto systémů a jejich dalšímu rozvoji. Hlavní část práce se zabývá problematikou spotřeby typických rodinných domů ve třech nejdůležitějších městech Libye. Dále předkládá citlivostní analýzu, která je zaměřená na výpočet množství energie vyžadované k pokrytí energetických potřeb typického domu (vytápění, ohřev vody a klimatizace) a porovnání naplnění těchto potřeb při uvažování technických a ekonomických hledisek. Výsledky práce budou využity pro tvorbu pokladů pro Libyjské energetické úřady.
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