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Sustav za upravljanje laboratorijskim ispitivanjima materijala
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Tomislav Svaguša
U radu je prikazan postojeći ručni način rada u laboratorijima građevinskog instituta i njegovi nedostaci te se razmatra poboljšanje rada informatizacijom. Slijedilo je koncipiranje informacijskog sustava za upravljanje laboratorijskim ispitivanjima materijala naziva e- Laboratorij sa primjenom na Internetu. Provedena je analiza laboratorijskog procesa pri čemu su definirane faze i opisan njegov tijek. Sistematizirana su podatkovna obilježja i organizirana u bazu podataka. Stvorena je...
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Tehnološka primjena sunčeva zračenja za razgradnju organskih tvari površinskih voda
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Davor Ljubas
Tema ovog rada je utvrđivanje mogućnosti primjene relativno nove skupine procesa u tehnologiji obrade voda – Unaprijeđenih Oksidacijskih Procesa (UOP), koji koriste ultraljubičasto zračenje kao izvor energije, za odvijanje procesa degradacije prirodnih organskih tvari (POT) u površinskoj vodi. Kako bi se postupak degradacije što više približio ekološkim načelima, pokušalo se kao izvor ultraljubičastog zračenja iskoristiti dio Sunčeva zračenja, koji iznosi svega 3-5% od...
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The analysis of the potential of material and energy recovery of municipal waste in Canada
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Patrick Fowler
Waste-related management is a complex topic which has evolved significantly over time. In a modern context, with the environment at the forefront, traditional methods alone cannot satisfy the needs. Even our current definition and use of the word waste needs to change. Sustainable and integrated waste-related management (SIWRM) is a holistic approach to traditional waste management, with clearly defined principles and focus on prevention and reduction. The role of waste-related products to...
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The development of a quasi-dimensional model for dual fuel combustion in engine cycle-simulation
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Ivan Taritaš
The research presented within this thesis gives an overview of the process of development, validation and application of a quasi-dimensional combustion model for the cycle-simulations in the conventional dual fuel internal combustion (IC) engines. The newly developed combustion model is called the Dual Fuel Multi Zone Combustion Model (DFMZCM), and has been integrated within the AVL cycle-simulation software (AVL Boost) Dual fuel engine is a term which is used for an IC engine that operates...
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The effect of the magnetic and optical field on hydrogen production via alkaline water electrolysis
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Matej Paranos
In this doctoral dissertation, the influence of the magnetic and optical fields on the process of
alkaline water electrolysis has been analysed. For that purpose, an experimental setup was
designed and an electrolyzer was constructed. In the scope of the research implementation of
the nickel (Ni) foam electrodes instead of smooth surface Ni electrodes was analysed. Based on
the experimental results an adjustment of the mathematical model for the calculation of energy
efficiency was...
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The role of energy storage in planning of a 100% renewable energy systems
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Goran Krajačić
The ultimate goals of sustainable development of the modern societies are planning and development of energy systems, thus the most of developed countries focused their energy policies on the development of sustainable energy systems. These systems should provide security of energy supply, they should be competitive and cause minimal impact to the environment. In a long term, only renewable energy sources supported by energy storage could fulfil these requirements. There are many RES and...
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Transient instabilities in turbomachinery
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Gregor Cvijetić
Turbomachinery CFD simulations have become a standard in industry,
although still presenting quite expensive and time consuming process. In order
to alleviate this, a number of tools and methods have been developed, being an
approximation or simplification of the ongoing process within turbomachinery.
Some of these methods include the steady state Multiple Reference Frame
approach (MRF), taking into account the rotation even though a steady state
simulation is run. Another more...
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Trošenje bokova kola pužnih prijenosnika
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Nenad Panić
U radu je istraživan par materijala koji nije uobičajen za izradu pužnih prijenosnika, visokokvalitetni čelik 16MnCr5 i aluminijska bronca CuAl10Fe5Ni5, koja je inače uobičajeni materijal za izradu kliznih ležajeva jer se pokazala kao dobar izbor. Na modelnom uređaju Timken izmjereni su faktor trenja za različite uvjete rada, Hertzov pritisak i brzina klizanja. Računalnom obradom metode odzivne površine dobivena je jednoznačna funkcija preslikavanja. Numerička je analiza...
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Two-way coupled Eulerian-Eulerian finite volume simulation of drifting snow
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Boutanios Ziad
An Eulerian-Eulerian two-way coupled model for simulating drifting snow, and solid particle-laden ows, is presented. Turbulent drag is used to account for particles turbulent dispersion. A new solid particle phase viscosity model is also developed from rst principles. The present transport model resolves the saltation layer, instead of modelling it with equilibrium formulations as in one-way coupled models. Implementation is done in foam-extend, a community-driven fork of OpenFOAM R ....
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Uklanjanje novih onečišćivala iz vode naprednim oksidacijskim postupcima
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Goran Smoljanić
Istraživanje koje je provedeno u sklopu ove disertacije temelji se na uklanjanju dvaju
mikrozagađivala iz vode naprednim oksidacijskim postupcima (NOP), primjenom ultrazvuka
visoke snage te ozona. Odabrana mikrozagađivala imaju različite namjene i pripadaju različitim
skupinama spojeva – gemfibrozil je farmaceutik koji služi za regulaciju lipida u krvi, dok je
epoksikonazol pesticid koji se koristi u preventivne i kurativne svrhe za zaštitu biljaka. Oba
spoja su, prema...
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