Numerično modeliranje toplotnega izmenjevalca za morski dizelski agregat

Josifoski, Hristijan (author), Vukašinović, Nikola (mentor), Grm, Aleksander (comentor)

V zaključni nalogi je predstavljena analiza in numerično modeliranje toplotnega izmenjevalnika za morsko-vodni hladilni sistem ladijskega pomožnega dizelskega motorja MAN D 2866 E. Z analitičnim izračunom energijske bilance je bil določen termični izkoristek motorja 40,8 % ter zahtevana toplotna moč hladilnega sistema 101,17 kW. CFD-simulacije v programskem paketu SolidWorks Flow Simulation so bile izvedene pri treh vstopnih temperaturah morske vode (10 °C, 15 °C in 20 °C) ter razkrile prisotnost mrtvih con in recirkulacijskih območij, ki zmanjšujejo učinkovitost prenosa toplote. Rezultati potrjujejo, da je izmenjevalnik za obravnavane razmere ustrezno dimenzioniran ter nakazujejo možnosti za geometrijsko optimizacijo.

• Language: Slovenian
• Keywords: toplotni izmenjevalniki, ladijski dizelski motorji, morsko-vodni hladilni sistemi, numerično modeliranje, računalniška dinamika tekočin, energijska bilanca
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [H. Josifoski]
• Year: 2026
• Number of pages: XII, 32 f.
• PID: 20.500.12556/RUL-183392
• UDC: 621.436:536.24:004.942(043.2)
• COBISS.SI-ID: 282650627
• Publication date in RUL: 12.06.2026

Secondary language

• Language: English
• Title: Numerical modelling of a heat exchanger for a marine diesel generator

Abstract

This thesis presents the analysis and numerical modelling of a heat exchanger for the seawater cooling system of a MAN D 2866 E. The analytical energy balance determined the thermal efficiency of the engine at 40.8 % and the required heat dissipation rate of the cooling system at 101.17 kW. CFD simulations were performed in SolidWorks Flow Simulation at three different seawater inlet temperatures (10 °C, 15 °C and 20 °C), revealing the presence of dead zones and recirculation regions that reduce the effectiveness of heat transfer. The results confirm that the heat exchanger is appropriately sized for the conditions considered and indicate opportunities for geometric optimization.

• Keywords: heat exchangers, marine diesel engines, seawater cooling systems, numerical modelling, computational fluid dynamics, energy balance