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Potential of waste heat recuperation in a polyfunctional building
Nagorskyi, Bogdan ; Charvát, Pavel (referee) ; Hejčík, Jiří (advisor)
The thesis deals with the possibilities of heat recovery in air ventilation systems. After a thorough analysis of the problems, the different ways of ventilation with the return of heat are compared even during simultaneous operation of the heating source. The research includes the selection of a suitable ventilation device with heat recovery based on a first investment and operating costs. Subsequently, the selected ventilation device is used for the HVAC project in the housing part of the multifunctional building. The project is created in BIM Revit software.
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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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Cooling systems of battery vehicle
Šimáček, Daniel ; Hvožďa, Jiří (referee) ; Bartuli, Erik (advisor)
This bachelor thesis deals with the issue of cooling systems for electric vehicles. The first part is devoted to the theoretical description of the components producing the largest part of the heat - the battery and the electric motor. Heat transfer theory is also mentioned to better relate the cooling issues. The second part focuses on the description of the current cooling approaches for the electric vehicle components - battery and electric motor. The section on electric motor cooling includes a comparison of cooling approaches with the internal combustion engine. Alternative cooling methods are described in next section.
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Condensing heat exchager for solid fuel boiler 200 kW
Pinkas, Jan ; Lisý, Martin (referee) ; Baláš, Marek (advisor)
The point of this thesis is a waste gas condensator for 200kW woodchips burning boiler. In the first part of the thesis types of heat exchangers are introduced. Condensation is introduced. Further all necessary equations and relations for vertical shall and tube heat exchanger are specified. Following those relations waste gas condensator is designed. Situation under different input conditions is talked over in the end.
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Steam Grate Biomass Boiler
Suchánková, Lenka ; Křemínský, Pavel (referee) ; Lisý, Martin (advisor)
The master's thesis describes the design of the steam boiler, which burns biomass with heat output of 6 MW. The required parameters of the steam are a temperature of 300 °C and a pressure of 2,5 MPa. The thesis is gradually devoted to stoichiometric calculations through heat losses and boiler efficiency, to the design of the combustion chambre, heat exchangers and pressure losses. Part of the thesis is drawing documentation of the boiler.
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Processing of documentation for testing station of heat pumps switchbox assembly line
Šindler, Matěj ; Škranc, Petr (referee) ; Polsterová, Helena (advisor)
In opening, this diploma thesis is introducing the company Daikin Device Czech s.r.o. In the next step the principle of function of a heat pump. Then there are described its main parts. First part of this thesis is dedicated to assembly line of the heat pump’s switchboxes. The layout of the assembly line is described and added with description of used health and quality measures. Main part is speaking about running test of the switchbox line. The main function of the test is described alongside with description of the process of making the testing software.
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Potential of waste heat recuperation in a polyfunctional building
Nagorskyi, Bogdan ; Charvát, Pavel (referee) ; Hejčík, Jiří (advisor)
The thesis deals with the possibilities of heat recovery in air ventilation systems. After a thorough analysis of the problems, the different ways of ventilation with the return of heat are compared even during simultaneous operation of the heating source. The research includes the selection of a suitable ventilation device with heat recovery based on a first investment and operating costs. Subsequently, the selected ventilation device is used for the HVAC project in the housing part of the multifunctional building. The project is created in BIM Revit software.
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PřekladačVypnout okamžitý překladPalletizing of the tilting head of a milling multi-purpose machining center with a horizontal spindle axis
Hynšt, Tomáš ; Marek, Tomáš (referee) ; Marek, Jiří (advisor)
This diploma thesis deals with palletization of heavy workpieces that are used by multi-purpose machining centers. The final outcome introduces a suitable option for palletization heavy workpieces of multi-purpose machining centers. In the first part of the thesis is draft of machining centers with parameters which were chosen by exploration of market for selecting suitable solution. The second part of thesis is dealing with a detailed draft palletization made by parts of exploration of market then design palletization system and design pallet changer. The designed construction of pallet changer is dimensioned with help of analytical calculating methods and numerical simulations methods. Outcome palletization system allows automatic change of twenty tons workpieces including pallet between two storage places.
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Utilization of absorption systems in the heating systems
Vidlák, David ; Špiláček, Michal (referee) ; Pospíšil, Jiří (advisor)
Main goal of this work is familiarization with basic features of absorption heat pumps and it’s growing importance on the market. In the first part of the work there is a research for clarifying facts associated with such pumps. In the introduction there are descriptions of basic information from the field of heating industry and its connections to our systems. Next there is a brief analysis of price changes in electricity and heat in the last five years. Main part of the analytical section is a description of the used absorption system. Second part of the work is focused on the calculation of the absorption system itself. First there is calculated internal and external part of the device according to the parameters from GE Power s.r.o. After this step there are parametric studies based on changes of key parameters of the default device for a demonstration of the behavior of a heating pump. In the end of the work there is a integration of the unit into the heating cycle for variations including flue gas condenser and using a cooling water from the turbine condenser.
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