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Rainwater-treatment and rainwater utilization
Štefek, Miroslav ; Kárník, Jan (referee) ; Štigler, Jaroslav (advisor)
The aim of this bachelor thesis is developing searches which are focused to treatment with rainwater and it's next utilization. We can find general information about situation in Czech Republic in this work and we can also read about products for rainwater treatment which are available in the market. There is a calculation for house too where we can see if it is advantageous step if we'll purchase rainwater treatment products.
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Turbulent flow suppression in pipe
Jahn, Jiří ; Rudolf, Pavel (referee) ; Štigler, Jaroslav (advisor)
This thesis deals with ways to suppress turbulent flow in pipelines. In the first part various methods of laminarization are presented, when the turbulent flow is transformed into laminar flow, including the results of experiments published by the authors. The next part presents the results from CFD. The calculations were performed for one of the methods mentioned in the first part and the results were compared with each other. In addition, several options have been suggested to improve the original method.
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Design of small hydropower plant for specific location.
Paštěka, František ; Rudolf, Pavel (referee) ; Štigler, Jaroslav (advisor)
This master's thesis is specialised in designing of small hydropower plant for specific location. In work should be designed suitable turbine for parameters found on the site, then created a basic project documentation of small hydropower plant with all devices and used principles, so that the plant would be capable of operation. In the next part of thesis should be extented the calculation of flow in the turbine delivery and assessed effect of geometry of turbine delivery on the flow.
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Fluid flow in narrow gap between two cylinders induced by pressure gradient
Bartková, Tamara ; Štefan, David (referee) ; Štigler, Jaroslav (advisor)
Diplomová práca je zameraná na popísanie prúdenia tekutiny medzikruhovým potrubím. Tok tekutiny je skúmaný pri viacerých podmienkach, čo vedie k laminárnemu ale aj turbulentnému prúdeniu. Práca obsahuje rešeršnú časť, ktorá opisuje doteraz známe vzťahy popisujúce daný typ prúdenia a takisto skúma spôsoby merania rýchlostného profilu v medzikruhových medzerách. Nasledujúca časť obsahuje návrh výpočtového modelu, popis simulácií prúdenia pri konkrétnych podmienkach a ich vyhodnotenie. Výsledky zo simulačnej časti sú použité pri popise charakteristických vlastností turbulentného prúdenia v medzikruží. Tieto charakteristiky sú použité v ďalšej časti práce, ktorá je cielená na získanie analytického vzťahu, ktorý by popisoval časovo stredovaný rýchlostný profil turbulentného prúdenia v medzikruhovej medzere.
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Experimental verification of ejector and creation of mathematical model.
Strmiska, Michal ; Štigler, Jaroslav (referee) ; Habán, Vladimír (advisor)
This diploma thesis deals with the area of ejectors. In the intoduction, an ejector is classed as an hydraulic machine. There is also an introduction of the principle and application of this machine there. The next part describes two different ways of calculation and there is a suggestion how to get characteristics, that were achieved by calculation in MS Excel, projected. The purpose of this diploma thesis is to confront this mathematical model with the experiment done in school laboratory at Kaplan department of hydraulic machines. The description of this experiment and the evaluation procedure of measured values is described in the final part of this diploma thesis.
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Pump station design optimization
Kunovský, Lukáš ; Klas, Roman (referee) ; Štigler, Jaroslav (advisor)
This diploma thesis summarizes the necessary knowledge for the design of the pump station. It focuses on the choice of suitable pumps and control valves. It also provides information on mathematical optimization methods. By combining these two disciplines a program was created that selects the most suitable combination of pumps and valves for the assigned requirements. These can vary over time. The goal of optimization is to minimize initial and operating costs. The phenomena considered are: time-varying flow and head height, serial and parallel co-operation of pumps, throttling control, a change of characteristics for variable speed and temperature, suction height control, maximum motor output, loss in connection piping.
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The Operating Point of the Centrifugal Pump.
Maléř, Pavel ; Haluza, Miloslav (referee) ; Štigler, Jaroslav (advisor)
The diploma thesis has a target to create a computer program that will serve as help for an evaluation of the system of pumps (The Operating Point of the Centrifugal Pump). The computer program is intended above all designers, but it will find its using in the sphere of education. The main computer program has two partial programs: System characteristic and Performance characteristic. The main point of this diploma thesis is create partial computer program: system characteristic. Other target is creating the main program and finding The Operating Point of the Centrifugal Pump. Other parameters are power efficiency, flow, specific energy for pump or pumps. These parameters are important for correct and economical proposal.
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Manual pumps
Matis, Michal ; Šedivý, Dominik (referee) ; Štigler, Jaroslav (advisor)
This thesis describes manual pumps. It contains research about history of usage of these pumps, further it deals with some pumps used today (construction, materials, pros-cons). Also it is pointing out on pumps in developing countries, which are used in places with lack of drinking water. In practical part is described design procedure of pedal-powered pump.
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Small Hydro Power Plant of The Fountain Type
Vintr, Martin ; Haluza, Miloslav (referee) ; Štigler, Jaroslav (advisor)
The main target of this bachelor´s work is dealing with small hydro power plant, especially these plants of the fountain type. The first chapter deals with description, the main division of hydro power plant and their building construction. There is hydro engine and their individual parts in the second chapter. These engines are then given in context with using of hydro energy and their using in hydro power plant of the fountain type. There is also design concept of stock inlet into turbine. Not just theory but also practical construction are showed here to be compact for better understanding of these power plants in the third chapter.
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Optimization of an Adapting Pipes
Svozil, Jan ; Drábková, Sylva (referee) ; Katolický, Jaroslav (referee) ; Štigler, Jaroslav (advisor)
Adapting pipes are a significant part of any pipe-line network and they are the sources of substantial hydraulic losses. They are designed for a manufacturing simplicity, regardless of flow. This paper concerns with lowering of hydraulic losses of adapting pipes by means of the shape optimization. Several methods of a mathematical optimization are tested and due to the complexity of the task and the need of the computational distribution among several computers, the gradient based algorithm is used. These methods loop together with a CFD software then automatically explore the design space. Several optimizations of diffusers with different opening angles, shape parameterizations and boundary conditions are made for the better insight on hydraulic losses. In three chapters there is description of development of parametric description of bend by means of Bezier surfaces. At the end optimum shape is found with hydraulic losses were decreased about 22%, which was not validated by experiment. In the final chapter is application of developed software on the shape optimization of Kaplan draft tube.
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