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Truck oil cooler
Pobořil, Martin ; Krištof, Ondřej (referee) ; Bartuli, Erik (advisor)
This diploma thesis deals with designing, fabrication and testing of transmission oil cooler of a truck made of polymeric hollow fibers. Literary research was done in the field of currently used vehicle gearboxes. An overview of properties and a distribution of oils was presented. Oils perform mainly lubricating, hydraulic and cooling function in the gearbox. The thesis contains a design of a cooler according to the specified parameters and its manufacturing process which was done by fiber winding technology. The device X-Winder was used. The program controlling all movements of the machine was programmed. The manufactured cooler passed tear tests and a measurement of characteristic parameters was taken. The pressure drop in fibers was measured at 80 °C . The aim of measurement at 60 and 70 °C was to get a pressure drop in shell and a thermal performance of the cooler. It was found out that the pressure drop dependence on a the shell flow is almost identical for both temperatures, which implies that the effect of the temperature on the pressure drop is negligible. The measurement of thermal performance was done under the same conditions as the measurement of the shell pressure drop. Its maximum achieved reading was 4,8 kW, at shell flow 100 liters per hour and at the temperature 59 °C. The achieved thermal performance is comparable to the thermal performance of standard metal coolers.
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Racing vehicle engine oil cooler
Lang, Filip ; Guzej, Michal (referee) ; Bartuli, Erik (advisor)
This disertation is about designing an oil cooler for racing car made of polymer hollow fibers. The oil cooler was made on an X-Winder device, which is not originally designed for production of heat exchangers, which was quite complicated to produce these exchangers. Therefore, programs initiating the movement of the winding device based on the parameters entered by the user were created within the work. The manufactured cooler was compared with used oil cooler from the race car in pursuance of measured parameters in the experimental chamber.
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Optimization of Heat Transfer Surfaces of Heat Exchangers
Bartuli, Erik ; Dohnal, Mirko (referee) ; Vinogradov, Andrey Vladimirovich (referee) ; Raudenský, Miroslav (advisor)
Disertační práce je zaměřena na kovové a polymerní výměníky tepla. Hlavním předmětem zkoumání je optimalizace teplosměnných ploch za účelem zvýšení účinnosti výměníku tepla. Tyto cíle byly dosaženy experimentálně a numericky pomocí modelování v ANSYS. Na základě dosažených výsledků byla rozpracována technologie křížového navíjení polymerních výměníků z dutých vláken. Experimentální zařízení původně určené pro navíjení tlakových nádrží bylo modifikované pro automatizovanou výrobu polymerních výměníků z dutých vláken, ježto může být použita při jejich masové výrobě. Tato práce se také zabývala výměníky tepla pro klimatizační systémy. Byly zkoumány možnosti využití polymerních výměníků z dutých vláken v těchto systémech. Mimo jiné byla provedena studie vlivu cyklického tepelného zatížení standardního kovového žebrovaného tepelného výměníku.
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Polypropylene membranes and their use
Strunga, Alan ; Bartuli, Erik (referee) ; Kůdelová, Tereza (advisor)
This Bachelor’s thesis is focused on polymeric membranes with additional focus on membranes produced from polypropylene. The main physicochemical properties of the membranes are discussed together with procedures and measuring devices suitable for their determination. Also discussed here are the most common production and modification methods, potential applications in the industry and the drawbacks that still limit widespread use. This works should provide basic information about the applications of hydrophobic membranes within the membrane technology.
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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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Unconventional Cooling Systems for Formula Students
Ondrejka, Filip ; Bartuli, Erik (referee) ; Kůdelová, Tereza (advisor)
This master’s thesis deals with the design and manufacture of a heat exchanger with polymeric hollow fibers for a Formula Student vehicle. The work can be divided into three parts. The first part contains a review of heat transfer and heat exchangers, the second part deals with polymeric fiber heat exchangers design and manufacture of of polymeric hollow fibers heat exchanger with a heat exchanger for a Formula Student vehicle. The last part deals with the comparison of polymeric hollow fibers heat exchanger with the original aluminum heat exchanger and the evaluation of the measurement results.
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Truck oil cooler
Pobořil, Martin ; Krištof, Ondřej (referee) ; Bartuli, Erik (advisor)
This diploma thesis deals with designing, fabrication and testing of transmission oil cooler of a truck made of polymeric hollow fibers. Literary research was done in the field of currently used vehicle gearboxes. An overview of properties and a distribution of oils was presented. Oils perform mainly lubricating, hydraulic and cooling function in the gearbox. The thesis contains a design of a cooler according to the specified parameters and its manufacturing process which was done by fiber winding technology. The device X-Winder was used. The program controlling all movements of the machine was programmed. The manufactured cooler passed tear tests and a measurement of characteristic parameters was taken. The pressure drop in fibers was measured at 80 °C . The aim of measurement at 60 and 70 °C was to get a pressure drop in shell and a thermal performance of the cooler. It was found out that the pressure drop dependence on a the shell flow is almost identical for both temperatures, which implies that the effect of the temperature on the pressure drop is negligible. The measurement of thermal performance was done under the same conditions as the measurement of the shell pressure drop. Its maximum achieved reading was 4,8 kW, at shell flow 100 liters per hour and at the temperature 59 °C. The achieved thermal performance is comparable to the thermal performance of standard metal coolers.
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Racing vehicle engine oil cooler
Lang, Filip ; Guzej, Michal (referee) ; Bartuli, Erik (advisor)
This disertation is about designing an oil cooler for racing car made of polymer hollow fibers. The oil cooler was made on an X-Winder device, which is not originally designed for production of heat exchangers, which was quite complicated to produce these exchangers. Therefore, programs initiating the movement of the winding device based on the parameters entered by the user were created within the work. The manufactured cooler was compared with used oil cooler from the race car in pursuance of measured parameters in the experimental chamber.
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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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Unconventional Cooling Systems for Formula Students
Ondrejka, Filip ; Bartuli, Erik (referee) ; Kůdelová, Tereza (advisor)
This master’s thesis deals with the design and manufacture of a heat exchanger with polymeric hollow fibers for a Formula Student vehicle. The work can be divided into three parts. The first part contains a review of heat transfer and heat exchangers, the second part deals with polymeric fiber heat exchangers design and manufacture of of polymeric hollow fibers heat exchanger with a heat exchanger for a Formula Student vehicle. The last part deals with the comparison of polymeric hollow fibers heat exchanger with the original aluminum heat exchanger and the evaluation of the measurement results.
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