National Repository of Grey Literature 56 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Solar hot water storage tank
Vyhlídalová, Karolína ; Vranayová,, Zuzana (referee) ; Hirš, Jiří (referee) ; Horák, Petr (advisor)
The solar hot water storage tank is off great importance in the solar collector array. It allows transformed energy accumulation thus deals with the inconsistency between supply and demand. The suitable design of the storage tank can improve system efficiency. The storage capacity represents the balance between the amount of stored hot water and the tank's heat losses. The design of the storage capacity is based on three hypotheses. The coverage of hot water demand by solar energy, the ratio between storage capacity and solar thermal collector area and the prediction that the storage capacity corresponds to one- to twofold hot water demand. The purpose of this thesis is to share an understanding of the solar storage tanks design and to improve the design through numerical simulation, experimentations and general calculations. It also focuses on the confirmation of the used hypotheses and determination of the best way to design the solar storage tank for general practice and further potential discussions. The simulation model has three variables – the storage capacity, collector area and the number of occupants. The intent is to find the interdependence of these three variables. The purpose of the simulations is to modify the design of the solar tank based on the mutual influence of studied parameters. The modifications are performed based on the users' needs.
Šteffek, Libor ; Ingeli,, Rastislav (referee) ; Hirš, Jiří (referee) ; Ostrý, Milan (advisor)
This dissertation thesis primarily focuses on the experimental measurement of energy consumption of a given energy-passive family house as well as theoretical research in the field of energy calculations using computer simulations. The results of quasi-stationary and dynamic simulations, with varying computational and real-time climate data, are compared with experimental measurements. Using the dynamic calculation model, which was validated by actually measured data, the relationship between architectural design and the energy performance of the building was analyzed. The influence of selected different operating modes for heat consumption on heating, cooling, ventilation, and interior overheating is observed. The result of the mutual interaction of several input parameters of variant solutions provides the basis for optimization of the whole design.
Analysis of boundary conditions of ground heat exchangers
Floreková, Skarleta ; Horák, Petr (referee) ; Hirš, Jiří (advisor)
Diplomová práca,, ,,Analysis of boundary conditions of ground heat exchangers,, je primárne zameraná na analýzu okrajových podmienok a hlavných faktorov vplývajúcich na spoľahlivý návrh a prestup tepla plošného zemného výmenníka v oblasti geotermálnych aktivít na kúpeľnom ostrove v Piešťanoch. Posúdenie možných vplyvov na životné prostredie, ako je napríklad vznik tepelných zmien v dôsledku extrakcie tepla vrátane zamŕzania pôdy v okolí potrubia a potenciálneho znečistenia podzemných vôd je taktiež rozoberané. Súčasťou tejto záverečnej práce boli spracované tri numerické analýzy metódou konečných prvkov pomocou softvéru COMSOL Multiphysics 5.6., ktoré sa môžu vyskytnúť v tejto konkrétnej oblasti. Prvá numerická analýza je podrobená štúdii dynamických procesov plošného zemného výmenníka tepla a zeminy nasýtenou vodou pri konštantnej teplotnej okrajovej podmienke pôdy. Dynamický proces zemného výmenníka tepla a nasýteného podložia pri nestálej teplotnej okrajovej podmienke je skúmaný v druhej numerickej analýze. Posledná analýza je vyhotovená na posúdenie prevádzky plošného zemného výmenníka tepla s možnosťou prúdenia podzemnej vody v rovnakej vrstve. Vďaka týmto numerickým štúdiám a výsledkom dynamických tepelných modelov, každá prípadová štúdia obsahuje rozloženie teplôt v zemine, výstupné teploty z výmenníka a vlastný čiastočný záver.
Office low-energy building of research center in Brno
Fireš, Michal ; Velísková, Eva (referee) ; Hirš, Jiří (advisor)
The aim of this master thesis is to design an office building for research institute in Brno. In the first part there is designed building structure. The building has two floors. First floor with four offices, toilets, storerooms, kitchen and utility room and second floor with two offices, toilets, conference room, kitchen and two roof terraces. The main entrance is oriented towards north. Load-bearing and non-load-bearing walls are designed from aerated concrete blocks, floor slabs are from cast-in-place reinforced concrete. The building façade is insulated with ETICS. In the second part there are designed systems of heating, mechanical ventilation, cooling, lighting and use of rainwater. Third, cooling analysis of research institute AdMaS in Brno is made. The designs are drawn in AutoCAD, thermal calculations in DEKsoft.
Internationalization Activity Plan for Selected Organization
Bednářová, Markéta ; Hirš, Jiří (referee) ; Chlebovský, Vít (advisor)
The thesis is focused on the creation of a plan of internationalization activities for the Brno University of Technology, the aim of which is to raise the awareness of the organization abroad, specifically at universities within the European Union. The theoretical part of the thesis introduces the individual concepts and analyzes that are furtherly used in the following parts of the thesis. The analytical part evaluates the current situation in the organization and serves as a basis for the proposals. In the proposals of the thesis, a plan of internationalization activities of the university is created.
Efficiency test reference year for the evaluation and design of solar thermal system
Jelínek, Petr ; Milan, Palko (referee) ; Hirš, Jiří (referee) ; Sedlák, Jiří (advisor)
This thesis describes utilisation of test reference year for design and evaluation of solar thermal system. The evaluation was performed on a solar thermal system of a single-family house in Rapotice, Czechia. Long-term monitoring of the system as well as indoor and outdoor climate were performed there. Measured data were compared with test reference year and data in Meteonorm database. Selected boundary conditions of the solar thermal system were compared with numerical simulations in Polysun. The results of the comparison were statistically analysed. Results of the simulations utilizing test reference year were closer to the on-site measurements than dates from Meteonorm. Therefore it could be concluded that test reference year is the best database of climate data for design of solar thermal system in Czechia.
Building Services in Low-energy Building
Fireš, Michal ; Tůmová, Eliška (referee) ; Hirš, Jiří (advisor)
The theme of my bachelor´s thesis is to analyse a building P4 of scientific and research center AdMaS (Advanced Materials, Structures and Technologies) in Brno and results compare with real values. The second part is heating proposal. Building P4 is composed of two side halls and stores, which are connected with central fourth-floor administrative building. The teoretical part is focud on nearly Zero Energy Building. The calculating part consists of heat loss calculating, heating elements design, hot water preparation and distribution of heating water. Heating elements are designed as panel and tubular. The part of project part is technical report, drawing documentation and the evaluation of present condition of building services.
Indoor climate parameters and construction analysis of romanesque rotunda in Znojmo
Hnilica, Ondřej ; Solař,, Jaroslav (referee) ; Hirš, Jiří (referee) ; Vlček, Milan (advisor)
The dissertation is focused on the National Cultural Monument - the Romanesque Rotunda of Saint Catherine in Znojmo, in particular on the way the interior influences an integral medieval mural fresco decoration. An impact of the interior on the fresco decoration of a fresco-secco type is judged by available information sources, which draw from long-time, mainly foreign professional experience. The rotunda interior analysis is based on long-term measurement of temperature and humidity parameters and evaluated by a statistical approach. An impact of variable input boundary conditions on the interior is parametrically tested in a dynamic numerical simulation. Obtained results show a positive effect of the installed floor heating in the rotunda and on the other hand a negative impact of visitors on the state of the integral mural painting in the object. A final part of the dissertation includes practical recommendations resulting from a postulate of the preventive heritage preservation of the National Cultural Monument.
Ventilation and air conditioning of apartment building
Kroupa, Petr ; Horká, Lucie (referee) ; Hirš, Jiří (advisor)
The purpose of my diploma thesis is to propose the air condition to apartments. The work is divided into two parts. The first part describes the climate of the internal spaces, its forms, what it is influenced by and what way it influences the human. It analyzes natural and indoor ventilations. The second part desings air condition to concrete flat, technical report including the mechanical drawings and technical paper of used products.
Modeling, simulation and experimental measurement of reaction of systems heating / ventilation requirements of regulation
Matějíček, Michal ; Komínek, Petr (referee) ; Hirš, Jiří (advisor)
The diploma thesis deals with the behavior of technical systems of the student dormitory in Brno. The temperature and humidity climate was measured and evaluated in the building. The measurement is then compared with the computer simulation created in DesignBuilder. The geometric model of the building was created in Revit, which supports BIM technology. Based on the evaluation of the experiment, the optimization of the technical systems in the building was proposed.

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