|
|
Algorithm for automatic selection of suitable equipment type from heat exchanger database
Havlů, Michal ; Kohoutek, Josef (referee) ; Jegla, Zdeněk (advisor)
Thesis is devoted to development of an database algorithm for selection (or necking selection) of suitable type of heat exchanger for given industrial application. Database creates a part of multipurpose calculation system containing three individual modules: (i) module for selection (or necking selection) of type of heat exchanger for given application, (ii) module for thermal-hydraulic design or rating of heat exchanger, (iii) module for calculation of investments and operating cost. Thesis describes details of method for selection of suitable heat exchanger type for given application and presents and discuss individual criteria for selection process which influence values in tables of priorites for given equipment. These tables are unavoible part of selection algorithm. Details of software application of selection algorithm are also presented in the thesis. Description of behaviour of individual types of heat exchanger creates important part of thesis. Practical application of developed selection algorithm is demonstrated on several industrial examples.
|
|
| |
|
|
Selection of suitable fluid flow directions in laminar flow tubular cooler
Krobot, David ; Kohoutek, Josef (referee) ; Jegla, Zdeněk (advisor)
This master’s thesis is devoted to problematic of selection of suitable flow directions in double pipe heat exchanger. First chapter is oriented to the construction of tube heat exchangers. It is also discussed impact of construction solution to the flow character and changing of his process parameters. The difference between parallel and countercurrent flow is also occurred in this parts. The next chapter is focused to the basics of heat-hydraulic calculations of heat exchanger. This also means explanation of ways of heat transfer and heat exchanger function. There are told about specific access to the solving problem of fluid laminar flow. The third chapter is detailed focused to the calculating of heat exchanger. At first is discussed factors, which have impact to the flow character. Next are detailed descriptions of design and controlling calculations, including more alternative ways to solve it. Next chapter exploit those results for deciding, which flow arrangement will be better for given case. Last chapter contain realization and reformulating of process heat exchanger calculating to the program code in Maple. There is also description of used algorithms and operating with them, so any user could be able to work with it. In this master’s thesis are used many examples from attached programs on different parts.
|
|
|
Design of flowrate control of solar system
Popov, Petr ; Grepl, Robert (referee) ; Vlach, Radek (advisor)
Problems of heating of supply water by solar energy are described in this paper. In term of these works was designed and realized attenuate prototype of solar system. There was realized measurements of the temperatures on this prototype and on the basis of these measurements was identified system parameters. Creation of compute simulation of solar system was the further step of this paper. The compute simulation was verified on the basis of comparing of final temperatures with experimental prototype. The design of control algorithm of flow of liquid through the solar system to reach the maximum effect of system is programme of this paper. Simulations of control algorithms are make in environment of MATLAB SIMULINK.
|
|
|
Modelling of fouling and its influence on technical-economic characteristics of tubular heat transfer equipment in units for thermal processing of wastes
Keliš, Michal ; Kohoutek, Josef (referee) ; Jegla, Zdeněk (advisor)
The main subject of this study is the improvement of predicative ability of previously developed mathematical model for prediction of so-called “fouling critical velocity”. Attention is devoted especially to the flue gas side fouling process on active heat transfer surfaces in tubular heat exchange tube banks installed in waste incineration process plants and also a technical – economic analysis based on obtained results. The model improvement consists among others in taking into account another forces (electrostatic, capillary etc.) haven't yet been considered, which influence the mutual contact between flue gas particles in case of sedimentation fouling or the contact between particles and heat exchanger tube walls respectively. The improved model has therefore more predicative ability to the reality of fouling process. The results are used for technical – economic analysis, which determines an optimal heat exchanger design with respect to fouling. Furthermore, the algorithm of this analysis, essential fouling mechanisms, fouled heat exchanger surface cleaning methods as well as fundamental knowledge of fouling coefficient prediction are presented, whereas the emphasis is placed on industrial tubular heat exchange equipment installed in waste incineration process plants.
|
|
|
Design of chiller for specific application
Gaverník, Michal ; Kohoutek, Josef (referee) ; Jegla, Zdeněk (advisor)
This diploma thesis deals with design of chiller for specific aplication – The City Theatre in Brno. The solving equipment of cooling appliance includes complete design of heat exchanger, battery cold and dimensioning of pipeline system used for various media. One part of design is also choice of individual coolant pumps, which guarantee necessary cirkulation of cooling medium in a certain pipeline routes. Selected battery cold in this administration reduced the size of the necessary cooling resources, therefore the cost of implementation. Everything is processed in calculating software. The resulting proposal is also drafted in the design program and will serve as one of the bases for subsequent implementation.
|
|
|
The large-scale solar systems
Králová, Martina ; Rubinová, Olga (referee) ; Počinková, Marcela (advisor)
Entering of thesis focuses on large-scale solar systems. Large solar-scale system will be used for heating water in public swimming pool. The pool is located in Brno - country. The pool is operated year-round. Great emphasis of the thesis is on the surface heat loss. Evaporation of water from the water surface is also applied in the experimental part of the thesis. In the calculations is used software for modeling the thermal microclimate of buildings and air conditioning design Teruna.
|
|
|
Wireless dataexchange for heat exchanger
Wojnar, Petr ; Hynčica, Ondřej (referee) ; Štohl, Radek (advisor)
The subject of this bachelor’s thesis is firstly an introduction to devices that are used for controlling the heat exchanger model, visualization and wireless data-exchange. For this purpose are used ROCKWELL AUTOMATION programmable logic controllers, ROCKWELL AUTOMATION terminal and SATEL radio modems. A schematic of the heat exchanger model is also included with description of each model part. The second part of this document is focused on the design of regulation, visualization and wireless data-exchange by means of already mentioned devices. The last part describes realization steps of controlling, creating of visualization and algorithm for wireless data transfer according to designs mentioned in the second part of this document.
|
|
|
Heat exchanger design
Loukota, Martin ; Lisý, Martin (referee) ; Baláš, Marek (advisor)
This bachelor thesis deals with design of tube heat exchanger for preheat the return water to the boiler. Thesis contains description, distribution and requirements of the tube heat exchangers, stoichiometric calculation, geometrical dimensions design, pressure loss and thermal performance calculation. Thesis also includes drawings of the designed exchanger.
|
|
|
Operating fouling of process and power equipment
Sénáši, Martin ; Pačíska, Tomáš (referee) ; Jegla, Zdeněk (advisor)
Bachelor thesis describes the issue of fouling of heat exchangers. This thesis briefly describes the fouling mechanisms and introduces the issue of consideration fouling in the design of heat exchangers. From gained information subsequently on simple calculation examples demonstrate using basic calculation methods impact of fouling on process stream. It also describes the impact of fouling on the technical and economic solutions of heat exchangers.
|
guest ::
