|
|
The use of Steam Turbines
Saňka, Marek ; Kracík, Petr (referee) ; Fiedler, Jan (advisor)
This bachelor thesis deals with the use of steam turbines as a part of the power station. The theoretical part focuses on the history, basic informations about steam turbines, as well as facts of the operation and allocation of steam turbines by various criteria. The theoretical part also includes description of the most common construction design. In the practical part is described the concrete power station and is made basic calculation of heat balance.
|
|
|
Thermal turbines
Tota, Lukáš ; Štelcl, Otakar (referee) ; Fiedler, Jan (advisor)
The bachelor thesis deals with thermal turbines. The first chapter contain history, with regard to the machines that preceded the turbines and the typical problems with the production of turbines. Then there is typology of steam and gas turbines. At the end of thesis there are examples illustrating the use of turbines in energy facilities.
|
|
|
Upgrading the secondary circuit of the Dukovany NPP
Fialová, Michaela ; Fiedler, Jan (referee) ; Šen, Hugo (advisor)
With the ever increasing usage of electric power and decreasing supply of natural resources, there is a growing effort to effectivelly maximise current dispositions of resources. Utilising project reserves at already functioning Nuclear powerplants belongs to these projects. In this article I am going to describe this utilisation and overall modernisation of the Dukovany Nuclear powerplant.
|
|
| |
|
|
Experimental research of heterogeneous nuclei in superheated steam
Bartoš, Ondřej ; Kolovratník, M. ; Šmíd, Bohuslav ; Hrubý, Jan
A mobile steam expansion chamber has been developed to investigate experimentally homogeneous and heterogeneous nucleation processes in steam, both in the laboratory and at power plants using the steam withdrawn from the steam turbine. The purpose of the device is to provide new insight into the physics of nonequilibrium wet steam formation, which is one of the factors limiting the efficiency and reliability of steam turbines. The expanded steam or a mixture of steam with a non-condensable gas rapidly expands in the expansion chamber. Due to adiabatic cooling, the temperature drops below the dew point of the steam at a given pressure. When reaching a sufficiently high supersaturation, droplets are nucleated. By tuning the supersaturation in the so-called nucleation pulse, particles of various size ranges can be activated. This fact is used in the present study to measure the aerosol particles present in the air. Homogeneous nucleation was negligible in this case. The experiment demonstrates the functionality of the device, data acquisition system and data evaluation methods.
|
|
|
Dual-system Magnetoresistive Sensor of Turbine Blades Vibration
Procházka, Pavel ; Vaněk, František ; Hodboď, Robert
The paper is focused on new methods of non-contact sensing vibrations and deflections of rotating machine parts, especially blades of steam turbines. Special attention is paid to the methods and magnetoresistive sensors developed in the Institute of Thermomechanics for non-contact measurements of characteristics of rotating blades inside steam turbines under operation. Principles of non-contact sensors based on measuring deflections are described and compared, including new types of magnetoresisitive sensors.
|
|
|
Research of pressure pulsations and vibrations at the turbine 1000 MW
Procházka, Pavel ; Vaněk, František ; Sadílek, J. ; Hodboď, Robert
Experimental research of pressure pulsation with simultaneous measurements of stator and blade vibrations in the L – 1 stage was conducted at the turbine 1000 MW of the nuclear power plant Temelín in 2012. The aim of this work was to find out links and possible sources of increased vibrations of the blades of the 3rd rotor stage during the turbine start-up. The applied methods and used appliances are described in the paper. Observed phenomena are analyzed with focus on the causes of blade vibrations.
|
|
|
Research of pressure pulsations and vibration in the turbine 1,000 MW
Procházka, Pavel ; Vaněk, František ; Sadílek, J.
The paper describes the methods and equipment used in experimental research of pressure pulsations with simultaneous measurement of vibration of the stator and blades of the third moving wheel in the turbine 1,000 MW at the nuclear power plant Temelín in 2012. The aim of this work was to find links and possible sources of blade vibration during the turbine start-up. The observed phenomena are analyzed, focusing on the causes of blade vibrations in the stage L-1.
|
|
| |
|
| |
guest ::
