TY JOUR TI CALCULATION OF THE HEAT TRANSFER SURFACE OF THE AIR HEAT EXCHANGER USED IN THE PRODUCTION OF METHYL-TET-BUTYL ETHER DEPENDING ON THE ANGLE OF INSTALLATION OF THE FAN BLADES KW air heat exchanger KW constructive KW heat transfer KW efficiency. JO Bulletin of the Angarsk State Technical University AU Luchko, M.V. AU Fomina, L.V. PY 2020 IS 1 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»