Abstract: A method for extracting and storing, respectively, energy in the form of concentration gradients wherein a process of extracting energy comprising the steps of feeding stored gaseous working medium into a working volume (2), compressing the working medium in the working volume (2), spraying a dilute solution into the working volume (2) before or during compression, increasing the temperature of the working medium fed in the working volume (2) by compression, evaporating the dilute solution with the working medium of increased temperature, removing heat from the working medium by the evaporating solution, keeping the heat extracted from the working medium in the form of latent heat of the vapor in the working volume (2), further increasing the temperature of the working medium until the partial pressure of the vapor in it approaches the vapor pressure of a solution of higher concentration at a corresponding temperature, spraying a solution of higher concentration of a vapor pressure of up to 60% of the vapor p

Abstract: A method for extracting and storing, respectively, energy in the form of concentration gradients wherein a process of extracting energy comprising the steps of feeding stored gaseous working medium into a working volume (2), compressing the working medium in the working volume (2), spraying a dilute solution into the working volume (2) before or during compression, increasing the temperature of the working medium fed in the working volume (2) by compression, evaporating the dilute solution with the working medium of increased temperature, removing heat from the working medium by the evaporating solution, keeping the heat extracted from the working medium in the form of latent heat of the vapor in the working volume (2), further increasing the temperature of the working medium until the partial pressure of the vapor in it approaches the vapor pressure of a solution of higher concentration at a corresponding temperature, spraying a solution of higher concentration of a vapor pressure of up to 60% of the vapor p

Abstract: A method of insulating a coil of a toroidal transformer, comprising forming an opening in an electrically insulating thermoplastic cup receiving an iron core with a coil for leading through terminals of the coil, arranging the iron core with the coil in the cup with the coil terminals are led out of through the opening, covering the cup with a plastic lid which engages the cup in a form-fitting manner, temporarily fixing the cup comprising the iron core and coil in an irrotatable manner, joining the cup and the lid by rotary friction by rotating welding by pressing the lid against the cup in a pressed state until the lid and the cup heat up and their material soften and become viscous due to friction, stopping the rotation of the lid within not more than one second after softening while maintaining the pressure of the lid and the cup to join their mixed material to form a continuous electrical insulation.