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Domestic heat pump
Sobotka, Tomáš ; Pavlů, Jaroslav (referee) ; Pospíšil, Jiří (advisor)
This bachelor´s thesis dissert on heating hot service water for self-contained houses by the help of heat pumps. Forepart is engaged in explication of fundamental terms about heat pump and about it‘s the lowpotentional heat resources. Second quater is meted out proposal for self-contained house and its economic expediency as compared to electric boiler.
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Accumulation of electricity from renewable sources
Dědek, Dušan ; Pavlů, Jaroslav (referee) ; Pospíšil, Jiří (advisor)
This work is specialized on problems accumulation electricity power from renewable sources and production electricity power from renewable sources for select object. First part describes renewable sources and their use in our conditions. Second part is specialized on accumulators specific for renewable sources. Third part compare to production electricity power from photovoltaic power station and windy power station and their combination for select object. Further accumulation these select sources. Final fourth part describe about their comparison from position how of technical so economic.
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Modular absorption cycle
Honka, Pavel ; Pavlů, Jaroslav (referee) ; Pospíšil, Jiří (advisor)
The thesis is focused on the cooling cycles, namely cycles of absorption. The work is divided into several parts, as problems to be solved. The first part deals with the principles and using refrigeration cycles in practice, their involvement and by comparing the working pairs of substances circulating in the absorption unit. The practical part deals with making a proposal for one-and two-level modular absorption cycle of 6 kW, and the subsequent techno-economic comparison with commonly supplied absorption unit
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Heat Exchanger
Čípek, Petr ; Pavlů, Jaroslav (referee) ; Fiedler, Jan (advisor)
Heat exchanger is a device mediating the exchange of heat between two flowing mediums. This exchange can be periodical or continuous. The choice of the type of heat exchanger depends on the usage and parameters of entering medium. This thesis deals with the tube recuperation (recovery) exchanger and calculation of new one. This new heat exchanger is supposed to replace current one produced by Kralovopolska in 1974. These heat exchangers have wide range of application. They are widely used in all fields, from energy related equipment to the pharmaceutical plants. The conversion of current heat exchanger was made according to the CSN EN 13 445 for non-heated pressure vessels. The calculation was made for all pressure load parts, among these are the mantle, beds, throats, tube plates and tube feet. All parts are suitable for all the styles of load.
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Power-accumulation from renewable energy sources
Kratochvíl, Tomáš ; Pavlů, Jaroslav (referee) ; Pospíšil, Jiří (advisor)
The diploma thesis is focused on problem of accumulating electric energy from renewable resources. The first section describes renewable energy sources, which are possible to use in the Czech Republic and principles of accumulating electric energy. In the following section are suggested systems of accumulating energy to accumulators by compressed air and pumped storage power station. These systems are proposed for uniform power supply from photovoltaic power station to electric power network all day. In conclusion, the suggested systems are compared from economic-technical perspective.
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Small hydropower plant
Novák, Jan ; Pavlů, Jaroslav (referee) ; Fiedler, Jan (advisor)
The basic aim of the Bachelor Thesis is the detailed description of the development and the currect state of hydraulic power plants in the Czech Republic. Moreover, there are mentioned other possibilities of the usage and suitable localities for the build-up or renewal. Furthermore, the work deals with a small hydraulic power plant in Letohrad. It describes hydrological conditions and the design of the existing hydro-electric plant. The thesis continues with the computational part which compares two versions of the mechanical and the technological solution. The first version takes into account the instalation of one turbine and the second one focuses on the placement of three turbines with the same parameters. After the interpretation it has been found that the hydroenergetical potential of flow is more efficient in the first alternative. In the conclusion, there are revenue calculations for produced energy and the recovery of investment.
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Domestic heat pumps
Lančarič, Vít ; Pavlů, Jaroslav (referee) ; Pospíšil, Jiří (advisor)
In this thesis work, I devote to a description of the principle of heat pumps and their dividing in terms of use low-potencional´s heat. Next, I chose the particular object (house) where is installed a heat pump, which I documented and compared his advantage with another solution for heat supply house.
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Layout of Tools to Restrict Software Piracy
Kopáč, Jiří Vili ; Pavlů, Jaroslav (referee) ; Kříž, Jiří (advisor)
I will try to solve and point to current problems connected with piracy in software industry in my project. I will do analysis of actual situation based on information sources. My suggestions will be made by backward synthesis which should show optimal solution as well as how software piracy reduces to minimum also how to defend and prevent against it.
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COMPUTING SOFTWARE AND METHODOLOGY DEVELOPMENT FOR REFRIGERATION MINICHANNEL CONDENSER EVALUATION
Pavlů, Jaroslav ; Masaryk, Michal (referee) ; Jaroš, Michal (referee) ; Pospíšil, Jiří (advisor)
Air cooled heat exchangers are used in many technology applications. Compactness, functionality and prize is decision maker for many future customers. Current development of compact heat exchangers is evident. Mostly used technology - expanded copper tube on aluminium fin is fluently changed by all aluminium heat exchangers with sophisticated heat exchange surface. Heating, Ventilating and Air-Conditioning with Refrigeration industry (HVAC-R) uses more and more extrude aluminium profiles as the main structure for all size heat exchangers. Similarly to Automotive industry HVAC-R uses minichannels as the basis of their products. It is not a new technology, it is technology proved through many years use in car industry. It is also true that current well known minichannel technology is not the last step. New designs and production lines are currently developed as well. All these new technologies have one unsolved thing together – how will be the new technologies easily computed through models. Current correlations which were used till now are obsolete, because of system miniaturization mainly. It is not easy to adapt old macro channel correlations on minichannel or microchannels where is not possible to diminish capillarity effects, different flow structures, etc. All these difficulties causes in model changes, software changes or iterative procedures upgrades. It is also evident that a lot of experimental exercises have to be done to examine heat exchanger behaviour ad characteristics. Because of precise computation of minichannel heat exchangers need or its geometry optimization is dissertation theme aimed to compare computation methodologies. PhD thesis is also aimed to check functionality of proposed computation system used simple similarity model. All proposed methods are compared to experimentally measured data and as the outcome of thesis are these data used to develop new computation basis.
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Layout of Tools to Restrict Software Piracy
Kopáč, Jiří Vili ; Pavlů, Jaroslav (referee) ; Kříž, Jiří (advisor)
I will try to solve and point to current problems connected with piracy in software industry in my project. I will do analysis of actual situation based on information sources. My suggestions will be made by backward synthesis which should show optimal solution as well as how software piracy reduces to minimum also how to defend and prevent against it.
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