20.500.12556/RUL-186695 Primerjava delovanja membranske ter aksialno-batne črpalke v pilotnem sistemu reverzne osmoze Comparison of the performance of diaphragm and axial-piston pumps in a pilot reverse osmosis system Reverzna osmoza je pomembna tehnologija za pripravo pitne in tehnološke vode, pri kateri ima izbira visokotlačne črpalke pomemben vpliv na procesne in akustične značilnosti sistema. V zaključnem delu je bila izvedena posodobitev pilotnega sistema reverzne osmoze ter primerjava obstoječega sistema z membransko črpalko Hydra-Cell in sistema z aksialno-batno črpalko Danfoss APP 0.6 ter predčrpalko. Sistema sta bila primerjana z vidika doseženih tlakov in volumenskih pretokov ter akustičnih značilnosti pri različnih obratovalnih tlakih in merilnih razdaljah. Oba sistema sta zagotavljala primerljive procesne parametre in bila z vidika zahtevanih obratovalnih pogojev zadovoljiva. Akustična analiza je pokazala razlike tako v relativnih digitalnih ravneh kot v frekvenčni sestavi zvoka. Pri sistemu Hydra-Cell so bile izrazitejše nižjefrekvenčne komponente, pri sistemu Danfoss pa višjefrekvenčne komponente. A-frekvenčno uteževanje je dodatno pokazalo pomen frekvenčne sestave pri vrednotenju akustičnih značilnosti. Sistem Danfoss z akustičnega vidika ni pokazal prednosti pred obstoječim sistemom Hydra-Cell, zato zamenjave z vidika zmanjšanja akustične motečnosti ni mogoče oceniti kot smiselne. Reverse osmosis is an important technology for the production of drinking and process water, in which the selection of the high-pressure pump has a significant influence on the process and acoustic characteristics of the system. In this thesis, a pilot-scale reverse osmosis system was upgraded, and the existing system with a Hydra-Cell diaphragm pump was compared with a system incorporating a Danfoss APP 0.6 axial-piston pump and a booster pump. The systems were compared in terms of achieved pressures and volumetric flow rates, as well as their acoustic characteristics at different operating pressures and measurement distances. Both systems provided comparable process parameters and satisfactorily met the required operating conditions. The acoustic analysis revealed differences in both relative digital levels and the frequency content of the emitted sound. The Hydra-Cell system exhibited more pronounced lower-frequency components, whereas the Danfoss system exhibited more pronounced higher-frequency components. A-frequency weighting further demonstrated the importance of frequency content when evaluating acoustic characteristics. From an acoustic perspective, the Danfoss system showed no advantage over the existing Hydra-Cell system; therefore, the replacement cannot be considered beneficial in terms of reducing acoustic disturbance. reverzna osmoza visokotlačne črpalke procesni sistem akustične meritve frekvenčna analiza reverse osmosis high-pressure pumps process system acoustic measurements frequency analysis true false false [R. Djukić] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-04 08:32:06 2026-09-04 08:32:08 2026-09-05 04:33:58 0000-00-00 00:00:00 2026 0 Ljubljana 0 XIII, 58 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.65:534.6(043.2) 289192 290013187 49129.pdf 49129.pdf 1 E8DE9BD2BDDDE19126D5D70229C41222 128e7f5950ab174a8b562bbdd61c2dabda5c8e09b8650f3131a1057118d1d526 5b010443-a82a-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=246017 Fakulteta za strojništvo 0 0 0