The monograph considers the use of hydroaerodynamic levitation to increase the efficiency of power devices. From the main physical effects of levitation, the author goes on to special cases of levitation of a ball in a constrained flow and its use in various technical applications to ensure high efficiency of thermal and mass transfer equipment. Through fundamental research and well-executed engineering solutions, new opportunities for energy saving at petrochemical, chemical and other enterprises are revealed. The monograph is intended for heat engineers involved in solving theoretical and applied problems in heat and mass transfer.