20.500.12556/RUL-174604 Innovative surrogate combustion model for efficient design of small-scale waste mono-incineration systems Small-scale thermal treatment systems can provide environmentally improved sewage sludge treatment due to processing sludge locally, which lowers transport costs and emissions. However, the combined effect of confined volume and complex sludge properties makes achieving strict regulations on flue gas emissions and end-ash composition challenging. System development thus requires the use of advanced, 3D CFD simulation supported studies. An important step forward regarding these is the application of combustion models which introduce tailored surrogate fuels and apply detailed chemical kinetics to achieve a high-fidelity combustion description in confined volumes. In relation to this, the paper presents an innovative computationally efficient sewage sludge surrogate-based combustion model capable of defining surrogates, tailored to sewage sludge, and capable of providing detailed insight into reaction zone evolution in small-scale sludge incineration systems. The validity of the proposed model and surrogates is confirmed via simulated temperatures differing from measurements in the small-scale system for less than 30 K. The validated model of a small-scale system is used in the parametric analysis of variable air–fuel ratios, higher fuel moisture presence, varying bed temperature, and varying thermal power to enable unprecedentedly accurate and efficient definition of design features of small-scale systems and to provide key guidelines for operation optimization. sewage sludge combustion surrogate model combustion control chemical kinetics 3D CFD true false true Angleški jezik Ni določen Članek v reviji 2025-10-07 06:52:23 2025-10-07 06:52:35 2025-11-24 03:41:26 0000-00-00 00:00:00 2025 0 0 33 str. iss. 10, art. 3170 Vol. 13 2025 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 0000-00-00 621.431 2227-9717 10.3390/pr13103170 251982083 Znidarcic_Innovative_Surrogate.pdf Znidarcic_Innovative_Surrogate.pdf 1 C34330D57D17EAC2E4EE37BD2A8687CC 7e41d5a853dcdfa3444e7d04a56691790c7a428e4595ac5a378cc04c861bd34e d3737ace-a339-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=219444 https://www.mdpi.com/2227-9717/13/10/3170 1 3b10fc57-a339-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=219443 Fakulteta za strojništvo 0 0 0