20.500.12556/RUL-139861 Zasnova prenosnika toplote za magnetni hladilnik Design of a heat exchanger for a magnetic refrigerator Diplomska naloga obravnava cevne prenosnike toplote, ki bi bili primerni za uporabo v tehnologiji magnetnega hlajenja. Poleg vira magnetnega polja in magnetokaloričnega materiala, sta v magnetnih hladilnikih pomembna tudi prenosnika toplote, ki skrbita za učinkovit odvod toplote iz hlajene okolice v magnetokalorični material ter nadaljnji odvod toplote v okolje. Zasnovali in izdelali smo dva različna cevna prenosnika toplote s prekati. Prvi je bil v celoti izdelan s postopkom 3D tiskanja s stereolitografijo, drugi pa je imel cevke iz bakra in ohišje izdelano s postopkom stereolitografije. Postavili smo merilno progo in eksperimentalno verificirali in medsebojno primerjali termo-hidravlične lastnosti izdelanih prenosnikov toplote. Na podlagi eksperimentalne analize smo učinkovitejši koncept prenosnika toplote še dodatno nadgradili, ga izdelali in eksperimentalno ovrednotili. Delo na koncu podaja ključne značilnosti za dosego čim višje učinkovitosti prenosnikov toplote za magnetno hlajenje in podaja smernice za nadaljnje delo. The thesis deals with shell and tube heat exchangers, which would be suitable for use in magnetic cooling technology. In addition to the magnetic field source and the magnetocaloric material, heat exchangers are also important elements of magnetic refrigerators. They are utilized for extraction of heat from the cooled environment to the magnetocaloric material and further heat dissipation to the ambient. We designed and developed two different shell and tube heat exchangers. The first was made entirely by a 3D printing process using stereolithography, while the second had copper tubes and a housing made by using a stereolithography process. We set up a measuring track and experimentally verified and compared the thermo-hydraulic properties of the investigated heat exchangers. On the basis of the experimental analysis, we further upgraded and experimentally evaluated the more efficient concept of the heat exchanger. At the end, the work gives the key features for achieving the highest possible effectiveness of heat exchangers for magnetic cooling and provides guidelines for further work. prenosnik toplote cevni prenosnik toplote prenos toplote magnetno hlajenje dinamika tekočin heat exchanger shell and tube heat exchanger heat transfer magnetic cooling fluid dynamics true false false [K. Žugelj] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2022-09-08 08:30:34 2022-09-08 08:30:36 2023-11-03 08:41:49 0000-00-00 00:00:00 2022 0 Ljubljana 0 XXII, 63 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 536.24:621.56(043.2) 244504 135126787 17505.pdf 17505.pdf 1 047E0E82B4B8429FE9E3C09C0D7C8614 dbfbf8042b967ab823851689a79f9f23919a2ce5d9269130fd8eac90991abc1c b2a980ed-2f3f-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=160497 Fakulteta za strojništvo 0 0 0