Oxygen transport hollow fiber membranes with the composition Ba0.5Sr0.5Co0.78W0.02Fe0.2O3 - delta were used to demonstrate the possibility of their heating to operating temperature by passing the alternative electric current (AC). In this case, membrane with mixed ionic and electronic conductivity simultaneously serves both as a self heater and as an oxygen separator. Direct AC heating opens the novel possibilities for fundamental and applied studies of oxygen transport membranes. It was demonstrated that the novel method of membrane heating results in the decrease in the effective activation energy of oxygen fluxes, intensifies oxygen permeation and enhances energy efficiency of oxygen production at T < 900 degrees C.