TY JOUR TI KW холодильная машина KW хладагент KW анализ работы KW refrigeration machine KW refrigerant KW analysis of the working process JO Herald of Technological University AU Ibraev, A.M. AU Mustafin, T.N. AU Khamidullin, M.N. PY 2025 IS 17 PB Kazan National Research Technological University