Investigation of Characteristic Features of Critical Heat Transfer under Conditions of Boiling of Subcooled Hydrocarbons in a Close-to-Critical Pressure Range

Results are given of an investigation of heat transfer under conditions of boiling of subcooled benzene and toluene at close-to-critical pressures in a vertical straight and horizontal coil pipes. A nonuniform distribution of the wall temperature along the perimeter of the horizontal coil pipe is revealed, as well as a smooth rise of this temperature under conditions of critical heat transfer. Equations are suggested for the calculation of critical heat flux in the pressure range identified above with the vertical position of the straight pipe.