V.M. Artyushenko, S. Yu. ChekmaevL. A. Prokudina, E. A. Salamatov

Effect of shear stress on evolution of disturbances on liquid film is investigated. Instability areas in co- and countercurrent modes are calculated for Re[1; 10]. At finite-mode approximation five waves amplitudes are calculated for optimal modes of liquid film flow.Process of introduction of system of automatic control in work counterflow heat exchanger device is considered; the PI - and PID-REGULATORS calculation is made for work with the given device; formulas for calculation of options of typical systems of regulation of counterflow heat exchangers are resulted.