20.500.12556/RUL-177313 Termodinamski model sekundarnega dela tlačnovodne jedrske elektrarne Thermodynamic model of the secondary part of a pressurized water nuclear power plant V zaključni nalogi je obravnavan sekundarni del tlačnovodne jedrske elektrarne. Predstavljen je lasten termodinamski model sekundarnega kroga, izdelan v programskem okolju Python. Model vključuje uparjalnike, turbinski sklop, regenerativne grelnike, kondenzator ter povezavo s terciarnim krogom rečnega in stolpnega hlajenja. Na podlagi izračunov z modelom so izdelani diagrami h-s in T-s parnega krožnega procesa ter določeni glavni integralni obratovalni parametri sekundarnega sistema, kot sta prosta moč in izkoristek. Obravnavan je tudi vpliv temperature hladilne vode in tlaka v kondenzatorju na moč elektrarne in na izkoristek sekundarnega kroga. V zaključku naloge je predstavljena še analiza obratovanja elektrarne med leti 2020 in 2023 glede na hidrološke in meteorološke podatke. Na podlagi izvedenih analiz smo ugotovili, da se ob višjih temperaturah in zmanjšanem pretoku hladilne vode izhodna moč elektrarne zmanjša, pomemben del pri znižanju moči pa predstavlja tudi delovanje hladilnih stolpov. Rezultati potrjujejo, da imajo pogoji okolice pomembno vlogo pri obratovanju sekundarnega kroga in da se sistem odziva nelinearno na spremembe obratovalnih pogojev. This thesis examines the secondary side of a pressurised water nuclear power plant. A thermodynamic model of the secondary circuit is developed in the Python programming environment. The model includes steam generators, the turbine train, regenerative feedwater heaters, the condenser, and the connection to the tertiary river and cooling tower system. Model calculations are used to generate h–s and T–s diagrams of the steam cycle. The main integral operating parameters of the secondary system, including net power output and efficiency, are determined. The influence of cooling water temperature and condenser pressure on plant power and secondary cycle efficiency is analysed. Plant operation in the period 2020–2023 is further assessed using hydrological and meteorological data. The results show that higher ambient temperatures and reduced cooling water flow lead to a reduction in electrical output. Cooling tower operation contributes significantly to this power decrease. The analysis confirms that ambient conditions strongly affect secondary cycle performance and that the system responds nonlinearly to changes in operating conditions. jedrska elektrarna sekundarni krog termodinamski modeli hladilni stolpi vplivi okolice izhodna moč nuclear power plant secondary circuit thermodynamic models cooling towers environmental influences output power true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-12-20 08:30:26 2025-12-20 08:30:34 2025-12-30 03:47:59 0000-00-00 00:00:00 2025 0 0 XI, 37 f. 2025 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.311.25:536.7(043.2) 282906 262516227 46448.pdf 46448.pdf 1 2A930DA779E6BFBDD89AC11B3E789880 965fe626023df7f8f512105c3dbe56475596706527609d3afc694ac23c56fa48 5a079e34-dd75-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=224275 Fakulteta za strojništvo 0 0 0