TY JOUR TI THERMAL IMAGING STUDIES OF THE ORIGINAL HEAT EXCHANGER PLATE KW plate heat exchanger KW heat transfer coefficient KW thermal imager KW turbulization KW spherical recesses JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Kuschev, L.A. AU Savvin, N.Y. PY 2021 IS 6 PB Belgorod State Technological University named after V.G. Shukhov