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Heat exchanger for rescue habitat
Bouma, Adam ; Kilkovský, Bohuslav (referee) ; Jegla, Zdeněk (advisor)
This thesis deals with the specific issues of designing a suitable type of heat exchanger for ventilation in a rescue habitat. The paper presents an overview of the most common types of heat exchangers and characterizes basic heat transfer mechanisms (radiation, convection). Based on the above and other knowledge, a thermal-hydraulic calculation model suitable for a regenerative heat exchanger type is compiled and the necessary calculations are performed. The thesis also contains an evaluation of the results for three materials which can be used in the production of a heat exchanger (aluminum, copper, steel).
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Software support in creating a complex calculation tool
Zich, Jan ; Jegla, Zdeněk (referee) ; Kilkovský, Bohuslav (advisor)
The master’s thesis is focused on the calculation of a heat exchanger with a crossflowed tube bundle found most in the air-cooled heat exchangers. The knowledge gained from the literature search is used to create libraries, giving a choice of several different methods in the hydraulic and thermal calculation as well as other key areas. These libraries allow their implementation in the comprehensive computational software P.E.C. developed at the Institute of Process Engineering. The thesis includes a verification of the correctness of the library’s calculations with showcased problems as well as 2 parametric studies. These investigate the dependencies of the transverse and longitudinal pitch on some of the process parameters of the heat exchanger.
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Prediction of fluids temperature profiles in heat exchanger
Havelková, Pavla ; Kilkovský, Bohuslav (referee) ; Jegla, Zdeněk (advisor)
This master’s thesis is focused on the description and processing of the cell method, which is generally recommended for prediction of fluids temperature profiles in heat exchanger. In the thesis the basic equations for calculating heat transfer are presented and is also described the current situation in the field of computational prediction of fluids temperature profiles in heat exchangers. The cell method is solved by using the software Maple and is applied to the specific case of industrial heat exchangers. The results obtained by the cell method are compared with the results obtained by educational version of software HTRI Xchanger Suite. By this comparison explicitness of the cell method is assessed.
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Processing and evaluation of experimental data measured at prototype unit for energetic utilization of biomass
Blažková, Blanka ; Kilkovský, Bohuslav (referee) ; Urban, Lukáš (advisor)
Main task of this final thesis is to analyse experimental measured data of prototype unit with output of 1 MW for energic biomass utilization. Furthermore the aim is to get acquainted with energic biomass problems utilization in middle output kettles and with stationary source legislation. To transfer measured value due to legislative conditions this diploma work solves the conversion procedure which is necessary to evaluate emission limits for measured concentration CO, SO2, NOX and stiff contaminating matters. My final work put emphasis on graphics processing in general tables and graphs with trends describtions. Endeavour is achieve discussion bilateral connection.
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The basic design of regenerative heat exchanger
Schütz, Stanislav ; Jegla, Zdeněk (referee) ; Kilkovský, Bohuslav (advisor)
Regenerative heat exchangers are established as a means of heat recovery in many industrial applications. The fixed-bed regenerators are mostly used to transfer heat from hot flue gas to cold air. In this work, several mathematical models of regenerators and several calculation methods were compared, while the preferred method is Willmott’s open method from 1964. Analysis of the influence of geometrical and operational parameters was carried out for the linear regenerator model.
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CIP station - Brewery Cold Block
Venclů, Jan ; Jegla, Zdeněk (referee) ; Kilkovský, Bohuslav (advisor)
The main subject of this bachelor´s thesis is theory of cleaning, especially by various influences on cleaning result, and description of cleaning by the help of CIP station. The second part of this work is practical proposal of CIP station inclusive relevant graphical documentation.
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Calculation of heat loss and pipe insulation
Tuček, Jan ; Jegla, Zdeněk (referee) ; Kilkovský, Bohuslav (advisor)
In this bachelor thesis "Calculation of heat loss and pipe insulation" describes the mechanisms of heat transfer and listed equations for calculating the Nusselt number for heat transfer by convection. The following describes the types of thermal insulation properties and their uses. The last part of this thesis is devoted to the preparation of calculating the heat loss calculation of the required thickness of insulation according to the required temperature and the most economical insulation thickness calculations.
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Calculation methods for tube banks heat exchanger
Housírek, Jiří ; Jegla, Zdeněk (referee) ; Kilkovský, Bohuslav (advisor)
This diploma thesis deals with calculation methods of heat exchanger with cross-flow tube bundle. The first part of the thesis contains summary of generally known basic calculation relations used in calculations of heat exchangers and a detailed description of a given heat exchanger.The second part of the thesis provides a description of available calculation methods of a given aparatus required for its thermal and hydraulic calculation. The final part describes application POST in 1.0 which has been formed on the basis of these calculation methods. Using this application check calculation of exchanger with cross-flow tube bundle was carried out and gained figures compared with results gained by means of professional calculation program HTRI.
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Heat exchanger design to improve the efficiency of industrial plant
Hofbauer, Jan ; Kilkovský, Bohuslav (referee) ; Freisleben, Vít (advisor)
In thesis is done thermal-hydraulic design of cross-flow tubular heat exchanger for combustion air preheating. In software Chemcad is done simulation of technological unit based on known operating data, which is used for behavior prediction of unit after heat exchanger installation. Then there are discussed essential mechanisms of heat transfer. After that there is overview of different heat exchanger types used for combustion air preheating. Before particular design there is performed optimalization of heat duty of heat exchnger based on payback time. Thermal-hydraulic design is performed using F-LMTD method in software GNU Octave. Obtained results are verified using software HTRI Xchanger Suite®. At the end there are discussed economical and ecological benefits of designed heat exchanger.
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