Green energy, Technology

Advanced cavitation boiler

Infinity SAV conducts research in the field of hydrodynamic cavitation to develop a cavitation boiler, a device, used for efficient water heating.
The cavitation boiler utilizes oil cavitation heating by vortex cavitator in the primary circuit, and is designed to produce hot water of the target temperature at the outlet of the secondary circuit. No other heating elements, tools or methods are utilized by the cavitation heating system, except for cavitation process itself.
Cavitation refers to the process of steam bubbles formation, called “voids” in the water column, facilitated by gradual pressure reduction of the water at high flow rates.
Cavities or steam-filled pockets formation may also be caused by acoustic waves or laser pulse radiation.
Closed air pockets, or “cavitation pockets”, being moved by water to high pressure areas, and get collapsed, can generate intense shock waves.
The nature of the “cavitation” phenomenon is similar to boiling a liquid. However, water pressure and steam bubble pressure, being of equal and average value during the boiling process is different for cavitation process, where water pressure is above average and above that of the steam pressure.
However, pressure fall occurs locally.
When favorable conditions are created, molecules of vapor gases evaporate into the cavity from the surrounding water medium.
This process proceeds with high intensity, as the temperature in cavities reaches up to 1200C due to constant bubbles expansion and compression.
Cavitation boiler consists of an electric motor and a shaft with a rotor. Casing of the boiler serves as a stator.
Rotor is designed in form of a disc with multiple blind holes, “cells” of a certain diameter and depth on its surface.
The rotor “cells” enable turbulence creation to form cavities in the water medium, which is in constant contact with the surface of the movable and static cylinder.
In this same gap the liquid is heated. For efficient boiler operation, the transverse minimum size of the rotor should not be less than 30 cm, with the rotational speed of about 10,000 RPM
The primary heating medium in the cavitation system is a special grade technical oil, with the target oil heating temperature set on the control panel.
Cavitational processes can rapidly heat the oil up to 100 ° C and above, with the range of boiling point for technical being 300C-320C.
As it is impossible to reach ignition temperature of the oil with the cavitation, such cavitation system is completely safe
The cavitation boiler can be connected directly to the water supply system directly or being used with a storage tank for heated water.
Water temperature in the cavitation boiler is controlled by an automatic valve through change in the secondary circuit flow. The output water temperature can be adjusted with the range of 50 to 90C.
Compared to direct electric heating devices, cavitation boiler has a greater ratio of useful thermal power to power consumed from the electrical network, exceeding the value of 1.

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