TY JOUR TI MODELING OF HEAT AND MASS TRANSFER PROCESSES IN A PIPE-IN-PIPE HEAT EXCHANGER KW heat and mass transfer KW heat recovery KW energy efficiency KW recuperator KW heat exchanger "pipe in a pipe" JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Il'ina, T.N. AU Uvarov, V.A. AU Kolesnikov, M.S. AU Evraev, D.A. AU Kretova, V.S. PY 2024 IS 9 PB Belgorod State Technological University named after V.G. Shukhov