**Abstract**

The rain tower is a prestressed, cable-stayed structure of hyperbolic shape with a steel core, (carbon) cables, and a cheap awning covering. An aero-thermal power plant is built into the tower, supplying electricity to the control system for the processes of condensation, coagulation, and vortex formation. Distinctive features are a supersaturated hot steam generator, a cloud droplet condenser, a spiral solar collector that allows to significantly reduce the required height of the structure due to an ascending vortex, a coagulation control system and matching the generated vortex with an undisturbed atmosphere. It is proposed to use pulses of acoustic shock waves as control actions, radiated by a phased array antenna in the form of a traveling wave. The signal parameters are selected according to the size of the colliding droplets in the vortex. The control device is mounted on the inside of the tower above the turbine of the aero-thermal generator. Impacts can increase the concentration of micro-droplets due to drift in an ascending vortex flow. This increases the likelihood of their collision and coagulation of cloud droplets, which turn into larger raindrops as they grow.

**Keywords:** energy building, renewable source, vortex concentration theory, acoustic vortex accelerator, aero-thermal power tower
