National Repository of Grey Literature 54 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Energy-saving family house in Jablunka
Mrnuštík, Petr ; Vrána, Jakub (referee) ; Počinková, Marcela (advisor)
The bachelor’s thesis focuses on designing a low-energy detached house in village Jablunka. Thesis is divided into two parts, first one is aimed at structural and architectural design, whilst the second one focuses on building services, especially heating with solid fuels. The house is divided into a two-storey and a single-storey part. Ground floor includes master bedroom, utility room and mainly open-plan living room connected to kitchen which opens onto a deck and garden. First floor then includes two bedrooms and study. Both floors have their own bathrooms with separate toilets. Structural system is designed as masonry walls from aerated concrete blocks, which are transferring load onto plain concrete foundation strips. Floor slab is to be made of reinforced concrete. Two-storey part is covered by prefabricated rib–and–filler gable roof with 15° slope, from aerated concrete fillers and reinforced concrete, the one-storey part has flat roof. Walls are insulated by 140 mm of mineral wool, plinth then by 120 mm of XPS. Ground slab will be insulated by 220 mm of graphite EPS, floor slab is insulated by 40 mm of impact sound insulation from mineral wool and 50 mm of EPS with installation layer. Flat roof is insulated by 220–340 mm of mineral wool with screed to fall function. Gable roof is then insulated by 180 mm PIR panels. Rainwater will be collected and stored in rainwater tank for gardening use, overflow will then lead to drainage blocks, where the water can be absorbed into soil, with overflow into stormwater sewer system. Ventilation is designed equal pressure, mechanical with enthalpy heat recovery exchanger and heating battery covering ventilation losses. Main heating source is solid fuel boiler, storing its energy in 750liter hot water tank, from which is the heat distributed into 200liter domestic hot water tank, ventilation heating battery and heating elements such as convectors, panel and rail radiators. As renewable source of energy is designed photothermal panels which will mainly heat domestic hot water, excess heat will then be stored in hot water tank.
Boilers for solid fuel
Zezulka, Patrik ; Kudela, Libor (referee) ; Baláš, Marek (advisor)
This bachelor thesis deals with the heating of houses with boilers for solid fuels. Thesis is divided into several parts. In the first part is dealt with most common solid fuels, their characteristics, composition and modifications for house heating. The second part is focused on solid fuel boilers, describes chosen boilers, their operation, their advantages and disadvantages. In the last part is economically assessed the suitability of selected solid fuel boilers for heating the model house.
Numerical Modelling of Grate Combustion
Juřena, Tomáš ; Klemeš,, Jiří (referee) ; Žitný, Rudolf (referee) ; Hájek, Jiří (advisor)
Předkládaná práce je zaměřena na numerické modelování spalování tuhých paliv na roštu metodami výpočtové dynamiky tekutin (CFD). Jelikož výsledky CFD simulací roštového spalování závisí na kvalitě vstupních dat, která zahrnují i údaje o teplotě, hmotnostním toku a chemickém složení spalin vystupujících z lože, pozornost je věnována především procesům, probíhajícím v loži během spalování na roštu. Velká část práce je věnována vývoji spolehlivého modelu spalování v sypaných ložích, jelikož může napomoci zkvalitnit výsledky simulací i rozšířit znalosti principů spalování tuhých paliv v sypaných ložích. V rámci práce byl vyvinut jednorozměrný nestacionární model spalování v experimentálním reaktoru a implementován do počítačového programu GRATECAL 1.3 včetně grafického uživatelského rozhraní. Zvláštní důraz byl kladen na konzervativnost modelu. Proto byla vyvinuta metoda pro kontrolu hmotnostní a energetické bilance systému a následně aplikována v řadě studií, v rámci nichž byly odhaleny některé chyby týkající se definic zdrojových členů, které byly převzaty z literatury a opraveny. Pomocí modelu byla provedena analýza šíření čela sušení a reakce hoření koksu po výšce lože pšeničné slámy. Na základě výsledků těchto analýz bylo doporučeno zahrnout i modelování změny porozity částic paliva, aby šířka reakční zóny byla predikována korektně v případě, že je uvažována změna porozity celého lože. Rovněž vyvinutá bilanční metoda byla použita k analýze vlivu kritérií konvergence na hmotnostní a energetickou nerovnováhu simulovaného systému. Bylo zjištěno, že škálovaná rezidua rovnic všech veličin by měla poklesnout aspoň na hodnotu $10^{-6}$, aby bylo dosaženo nízké hmotnostní a energetické nerovnováhy a tudíž uspokojivě přesných výsledků ze simulací v loži. Druhá část práce je věnována vývoji a implementaci knihovny uživatelem definovaných funkcí pro komerční CFD nástroj ANSYS FLUENT, které slouží k propojení modelu lože s modelem komory reálné spalovací jednotky, aby byla umožněna dynamická změna okrajových podmínek na vstupu do komory v závislosti na výstupech ze simulací v loži. Vytvořené rozhraní pro propojení těchto dvou modelů je dostatečně obecné pro aplikaci na širokou škálu modelů roštových kotlů. Popsané výsledky přispívají k lepšímu porozumění numerickému modelování spalování na roštu, a to zejména ve fázi sestavování numerického modelu a nastavení parametrů řešiče pro kontrolu konvergence.
Effect of change of fuel at boilers efficiency
Hazucha, Jan ; Štelcl, Otakar (referee) ; Baláš, Marek (advisor)
Bachelor‘s thesis deals with sorting solid fuels and boilers for solid fuels up to power of 200 kW, it’s most important attributes and legistative claims. Next part of the thesis deals with the impact between of different types of fuels on efficiency.
Fuel Properties: Proximate Analysis of Solid Fuels
Kučera, Ondřej ; Elbl, Patrik (referee) ; Musilová, Petra (advisor)
The bachelor thesis deals with the use of biomass as an alternative energy source and proximate analysis of solid fuels. In the theoretical part there is a research on energy utilization of biomass and a proximate analysis of solid fuels. Individual methods of determination of proximate analysis are described in detail, namely determination of water, ash and volatile combustible content and determination of gross calorific value. The practical part presents results of analysis of selected locally available plant biofuels. The methods of proximate fuel analysis have been successfully applied.
Boilers for solid fuel
Mozola, Ondrej ; Poláčik, Ján (referee) ; Baláš, Marek (advisor)
Main goal of this bachelor thesis is a research about a different kinds of low performance boilers used for heating in family houses. First part is dedicated to characteristics of solid fuels and advantages or disadvantages of their usage. The second part is focused on composition of solid fuels and their most important observed properties. The third part divides boilers using solid fuels into different categories. Last part consists of comparative calculation of financial costs needed on heating in selected family house with different boilers.
Verification of emission class of solid fuel boilers
Skoupý, Jan ; Štelcl, Otakar (referee) ; Baláš, Marek (advisor)
This thesis is focused on verifying of emission class of solid fuel boilers. The boilers are described from principle of combustion process in the beginning. The second part divide and describe solid fuels which are intended to burn in these boilers. The third part deals with requirements of legislation of the Czech Republic and European Union. The last part verifies this requirements on the selected solid fuel boiler.
Modern Trends of Heating of Family House
Lyčka, Aleš ; Špiláček, Michal (referee) ; Lisý, Martin (advisor)
The aim of the thesis was to summarize current knowledge of the ways of heating with an emphasis on modern technology. Then to perform a basic comparison of the various methods of heating on the model house.
Combustion of Solid Fuel in Unsuitable Boilers
Ondrůj, Jakub ; Milčák, Pavel (referee) ; Lisý, Martin (advisor)
The aim of this work is to investigate the combustion of various solid fuels and experimentally verify the environmental impacts of combustion of selected solid fuels in inappropriate boilers. The first part of the thesis is focused on the determination of solid fuel burning conditions and the second part describes the basic combustion tests, the comparison of the measured emissions during combustion of selected fuels and the comparison of these results with the valid emission limits.
Heating of building with air conditioning
Toboláková, Andrea ; Vendlová, Lucie (referee) ; Topič, Jan (advisor)
The main goal of the diploma thesis is to design a heating system and hot water heating for a newly built wellness hotel placed on the beach nearby reservoir Vranov. The theoretical part is focused on the build heating with solid fuels specifically pellets. In the calculation part is processed the proposal of heating systems, the heat sources, the water heater and other equipment. The last part of the project includes a technical report and drawing documentation at the level of implementation of the project.

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