TY JOUR TI Opredelenie ehnergeticheskogo i ehksergeticheskogo koehffitsientov poleznogo deistviya rekuperativnykh teploobmennikov KW JO From Chemistry Towards Technology Step-By-Step AU Leontiev, V.K. AU Korableva, O.N. AU Leont'ev, A.V. PY 2026 IS 7 PB Yaroslavl State Technical University