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V zaključni nalogi je predstavljena raziskava in analiza izdelave hladilnih reber iz aluminija s preoblikovalnim postopkom istosmernega iztiskavanja, ki bi lahko služila za hlajenje LED žarometov. Predstavili smo potek analiziranja vplivov tehnoloških parametrov in oblik po načrtu Taguchijeve ortogonalne matrike, eksperimente pa izpeljali s pomočjo simulacij, ki smo jih izvajali s programsko opremo QForm. Glede na najbolj ugodne rezultate smo postavili model, za katerega smo zasnovali in skonstruirali orodje. Za končan model orodja smo naročili material in poslali povprašanje za izdelavo lokalnim orodjarjem s ciljem realizacije izdelka. The thesis deals with the research and analysis of making aluminium cooling fins using the one direction extrusion process, the final product being utilized for cooling LED lights. The course of the analysis of impacts of technological parameters, as well as shapes, according to the Taguchi Orthogonal Matrix, has been presented. The experiments were carried out in the form of simulation, using the QForm software. According to the optimal results a model has been formed, along with the design and construction of the tools for its fabrication. Finishing the ultimate model of the tools was followed by commission of the material and inquiry among the local toolmakers in order to finalize the project.

Efficiency of cooling fins inside of a light emitting diode fog lamp is studied using computational fluid dynamics. Diffusion in heat sink, natural convection and radiation are the main principles of the simulated heat transfer. The Navier-Stokes equations were solved by the computational fluid dynamics code, including Monte Carlo radiation model and no additional turbulence model was needed. The numerical simulation is tested using the existing lamp geometry and temperature measurements. The agreement is excellent inside of few degrees at all measured points. The main objective of the article is to determine the cooling effect of various heat sink parts. Based on performed simulations, some heat sink parts are found to be very ineffective. The geometry and heat sink modifications are proposed. While radiation influence is significant, compressible effects are found to be minor.