20.500.12556/RUL-170094 Eksperimentalna analiza učinkovitosti tankih parnih komor s strukturiranimi površinami Experimental analysis of thin vapor chamber performance with structured surfaces Učinkovito odvajanje toplote je vse večji izziv v sodobni elektroniki, kjer naprave postajajo vse manjše in zmogljivejše. Med naprednimi metodami odvajanja toplote iz virov z visoko gostoto proizvedenega toplotnega toka se vse pogosteje uporabljajo parne komore, ki z učinkovitim prenosom toplote omogočajo boljšo porazdelitev temperature. Kljub uveljavljenosti tehnologije je nadaljnji napredek možen ob uporabi različno strukturiranih površin, delovnih medijev in dizajnov. V okviru te naloge je bila izdelana eksperimentalna proga, ki omogoča sestavo in testiranje parnih komor ob prilagodljivi moči in geometrijski porazdelitvi virov toplote, merjenje temperatur ter izračun toplotnega toka na strani izvora in ponora. Opravljena je bila analiza merilne negotovosti in meritve s parnimi komorami, pri čemer smo primerjali neobdelane in lasersko strukturirane hidrofilne in hidrofobne bakrene površine. Rezultati so pokazali znatno izboljšanje odvoda toplote v primeru uporabe strukturiranih površin in vode kot delovnega fluida, saj se je pri toplotni obremenitvi 20 W termična upornost parne komore zmanjšala za 45,2 %. Efficient heat dissipation is an increasingly critical challenge in modern electronics, where devices continue to shrink in size while increasing in power. Among advanced cooling methods for managing high heat fluxes, vapor chambers have gained prominence due to their ability to provide uniform temperature distribution through efficient heat transfer. Although this technology is well established, there remains significant potential for performance enhancement by integrating structured surfaces, alternative working fluids, and optimized chamber designs. In this work, a vapor chamber testing setup was developed to enable the assembly and evaluation of vapor chambers with adjustable heat input and variable geometric distribution of heat sources. The setup allows for precise temperature measurement and calculation of heat flux on both the source and sink sides. An uncertainty analysis of the measurements was conducted to ensure result reliability. Experimental tests were performed using vapor chambers featuring untreated and laser-structured copper surfaces with hydrophilic and hydrophobic properties. The results demonstrated a substantial improvement in heat dissipation when structured surfaces and water were used as the working fluid. Specifically, the thermal resistance of the vapor chamber was reduced by 45,2 % at a thermal load of 20 W. parna komora uparjanje kondenzacija hlajenje elektronike ultra-tanki hladilni sistemi testiranje parnih komor vapor chamber evaporation condensation electronics cooling ultra-thin cooling systems vapor chambers testing true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-07-02 12:58:35 2025-07-02 12:58:36 2025-08-01 12:18:56 0000-00-00 00:00:00 2025 0 0 XXII, 60 str. 2025 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.38:621.1:536.2(043.2) 271150 244591107 39191.pdf 39191.pdf 1 565601AB02AD72AD42334684ED87985D 552ae58fdb2615cef811845297d820e270794b8be2b064c9da7185e96e744e47 9b70f1f9-5731-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=212020 Fakulteta za strojništvo 0 0 0