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Rankin cycle for waste heat recovery of internal combustion engines
Kučinský, Josef ; Fiedler, Jan (referee) ; Brázdil, Marian (advisor)
This bachelor thesis deals with Rankine cycle as a method of waste heat recovery for internal combustion engine. Firstly, internal combustion engine and some technologies on waste heat recovery are described simply. Secondly, Rankine cycle and its utilization in automobiles are overviewed. At the end, there are summarized results from simulations and experiments regarding the issue. It was stated in a conclusion that in case of waste heat recovery in automobile, Rankine cycle is a promising technology but it is not ready for wide application yet.
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Design of a unit for utilization of waste heat from a computing system
Valachovič, Filip ; Brázdil, Marian (referee) ; Chýlek, Radomír (advisor)
Global warming and the associated high energy costs are considered as the main problems at presents. As a result, there is an interest in reusing waste energy. This bachelor thesis is devoted to the design and assessment of the potential use of waste heat generated by the systems for the mining cryptocurrencies. The first part of the work deals with the process of mining cryptocurrencies as a whole and their energy consumption. The work, among other things, deals with the possibilities of cooling and subsequent recovery of waste heat from these systems. Part of the work is a theoretical design of a unit for waste heat recovery from mining rigs, considering immersion cooling with the resulting economic balance.
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Economy building refrigeration systems
Kohút, Radovan ; Formánek,, Marian (referee) ; Rubinová, Olga (advisor)
The thesis deals with the refrigeration systems. It analyzes ways to optimize the refrigeration process and the associated energy savings. In a practical application on an industrial building where there is the need of cooling the machinery, it compares the reference system with another two optimized alternatives. The heat recovery alternative supports heating and hot water supply and the water-side free cooling alternative lowers the energy consumption during the cold period of the year. The experimental section assesses the suitability of floor cooling in relation to the stratification of air temperature along the height of the room and the effect on thermal comfort of people.
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Utilization of compressor waste heat into the district heating system by means of an absorption heat pump
Aranguren Campos, Fabian Alexis ; Baláš, Marek (referee) ; Pospíšil, Jiří (advisor)
With the growth of energy consumption and the optimization of industrial processes worldwide, new energy sources have been explored and investigated. Waste heat is a potential source for the generation of electricity and heat. This heat can be reused at different stages of industrial processes by using absorption heat pumps, which transfer thermal energy from a location with a lower thermal potential to a location with a higher thermal potential. This research work is basically focused on the evaluation of different absorption heat pumps implemented in the SAKO Brno incineration plant. To carry out this purpose, a bibliographic review of this technology has been carried out worldwide, then the mass and energy balance in the compressor is presented, from which the waste heat to be recovered with the pump will be obtained. Using the EES software, the mass and energy balance of the selected pumps is performed, then the amount of heat and electrical energy generated by the plant when implementing each of the pumps is shown, and finally the economic analysis is presented The design and implementation of a heat exchanger in the system is also included as an essential part of improving operation. The best option arises from the highest operational efficiency at the lowest possible cost.
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Waste heat recovery from an industrial laundry dryer
Kyzlinková, Gabriela ; Horňák, David (referee) ; Máša, Vítězslav (advisor)
Každým dnem slýcháme o problémech spojených s cenami energií, které neustále rostou a o neudržitelnosti neobnovitelných zdrojů se snahou využít každý joule energie, který máme k dispozici. Tyto problémy se pojí s využitím odpadního tepla, což je hlavním motivem této bakalářské práce. V ideální situaci by bylo možné využití veškerého tepla, které z procesů volně uniká bez dalšího zužitkování. Tato bakalářská práce se zabývá prádelenským procesem, a to zejména využitím odpadního tepla z průmyslových sušičů prádla. Teplo ve spalinách v sušičích se nevyužívá a hlavním důvodem je výskyt textilního otěru z prádla, což způsobuje riziko zanešení systému pro využití odpadního tepla. Práce posuzuje možný přínos využití tohoto odpadního tepla. Pozornost bude věnována výpočtu odpadního tepla z několika sušičů z prádelenského průmyslu a stejně tak porovnání ekonomického zhodnocení. V této studii bylo zjištěno, že při využití tohoto odpadního tepla můžeme dosáhnout až 89 kW tepelného výkonu. Rekuperované teplo může být využito k ohřevu vodu, což by vedlo ke snížení provozních nákladů. Zvolen byl plášťový a trubkový výměník, kde by v případě denního čištění došlo ke snížení textilního otěru. Výsledky této práce mohou být aplikovány do nejrůznějších průmyslových prádelen.
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Utilization of compressor waste heat into the district heating system by means of an absorption heat pump
Aranguren Campos, Fabian Alexis ; Baláš, Marek (referee) ; Pospíšil, Jiří (advisor)
With the growth of energy consumption and the optimization of industrial processes worldwide, new energy sources have been explored and investigated. Waste heat is a potential source for the generation of electricity and heat. This heat can be reused at different stages of industrial processes by using absorption heat pumps, which transfer thermal energy from a location with a lower thermal potential to a location with a higher thermal potential. This research work is basically focused on the evaluation of different absorption heat pumps implemented in the SAKO Brno incineration plant. To carry out this purpose, a bibliographic review of this technology has been carried out worldwide, then the mass and energy balance in the compressor is presented, from which the waste heat to be recovered with the pump will be obtained. Using the EES software, the mass and energy balance of the selected pumps is performed, then the amount of heat and electrical energy generated by the plant when implementing each of the pumps is shown, and finally the economic analysis is presented The design and implementation of a heat exchanger in the system is also included as an essential part of improving operation. The best option arises from the highest operational efficiency at the lowest possible cost.
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|
|
Design of a unit for utilization of waste heat from a computing system
Valachovič, Filip ; Brázdil, Marian (referee) ; Chýlek, Radomír (advisor)
Global warming and the associated high energy costs are considered as the main problems at presents. As a result, there is an interest in reusing waste energy. This bachelor thesis is devoted to the design and assessment of the potential use of waste heat generated by the systems for the mining cryptocurrencies. The first part of the work deals with the process of mining cryptocurrencies as a whole and their energy consumption. The work, among other things, deals with the possibilities of cooling and subsequent recovery of waste heat from these systems. Part of the work is a theoretical design of a unit for waste heat recovery from mining rigs, considering immersion cooling with the resulting economic balance.
|
|
|
Economy building refrigeration systems
Kohút, Radovan ; Formánek,, Marian (referee) ; Rubinová, Olga (advisor)
The thesis deals with the refrigeration systems. It analyzes ways to optimize the refrigeration process and the associated energy savings. In a practical application on an industrial building where there is the need of cooling the machinery, it compares the reference system with another two optimized alternatives. The heat recovery alternative supports heating and hot water supply and the water-side free cooling alternative lowers the energy consumption during the cold period of the year. The experimental section assesses the suitability of floor cooling in relation to the stratification of air temperature along the height of the room and the effect on thermal comfort of people.
|
|
|
Rankin cycle for waste heat recovery of internal combustion engines
Kučinský, Josef ; Fiedler, Jan (referee) ; Brázdil, Marian (advisor)
This bachelor thesis deals with Rankine cycle as a method of waste heat recovery for internal combustion engine. Firstly, internal combustion engine and some technologies on waste heat recovery are described simply. Secondly, Rankine cycle and its utilization in automobiles are overviewed. At the end, there are summarized results from simulations and experiments regarding the issue. It was stated in a conclusion that in case of waste heat recovery in automobile, Rankine cycle is a promising technology but it is not ready for wide application yet.
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