The requirements for decarbonization of the airspace and a sharp increase in world prices for fossil fuels lead to the search for alternative sources of heat generation. The book provides the theory and practice of using alternative methods of generating thermal energy based on pulsed processing of process fluids, as a method of intensifying hydrodynamic, mass transfer and thermal processes.Examples of the generation of thermal energy in the household sphere and the industry of devices with a pulsed effect on the coolant are given.Investigations of the optimization of pulse devices related to the improvement of the geometry of their working chamber on the basis of hydrodynamics, mass transfer, heat transfer and operating modes are presented.Mathematical models have been developed that make it possible to analyze hydrodynamic processes in the working chambers of impulse devices.The proposed designs of rotary-pulse, vortex heat generators, submersible combustion apparatuses, which have been tested in industry with high energy efficiency coefficients.