Dulskyi, A. and Siryi , O. 2025. Research of the working process of water-tube/fire-tube boilers operating on biogas. Reporter of the Priazovskyi State Technical University. Section: Technical sciences. 50 (Jun. 2025), 164–173. DOI:https://doi.org/10.31498/2225-6733.50.2025.336329.