With saturated boiling in water-ethanol 20 % wt detected peak flux qcr = 1.19 MW/m2. and at TL=70 the size qkp considerably increases to 9,80 MW/m2. The article contains results of the experiment on subcooled boiling in a mixture water-ethanol 20%. With growth subcooling is increased qcr, Тcr and αcr. The main factor is the sharp rise qcr increase wall temperature ∆Т=Тcr -ТL

Keywords: surface boiling of mixture, peak flux, wall temperature, critical heat transfer coefficient