TY JOUR TI ISSUES OF HEAT EXCHANGE APPARATUS OPTIMIZATION KW relative costs KW heat exchanger KW heat transfer KW hydraulic resistance KW coolant speed JO Bulletin of the Angarsk State Technical University AU Scherbin, S.A. AU Demin, G.G. PY 2019 IS 1 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»