Electrical steam generator

An electrical steam generator comprising

• a pressure vessel having a wall defining a chamber;
• at least two trays for receiving water disposed in a vertical spaced array within said pressure vessel along a vertical axis with alternate trays eletrically connected to said pressure vessel wall and the other trays electrically insulated from said pressure vessel, each tray having an overflow over which a film of water flows from each tray downwardly into the next lower tray and from the bottom tray into a sump in said pressure vessel;
• a power supply electrically connected to said other trays and to said pressure vessel;
• means for pumping water from said sump in said pressure vessel to the uppermost of said trays;
• at least one flat stilling element horizontally disposed in each tray at the overflow to calm the water in said respective tray;
• at least one vertical water and steam permeable stilling wall disposed upstream of said overflow of each tray and extending from a horizontal plane below said overflow to a horizontal plane above said overflow;
• and
• at least one vertical water impermeable shielding wall disposed downstream of said overflow of each tray and extending from a horizontal plane above said overflow to a horizontal plane below said overflow to define a gap with said tray of a horizontal dimension greater than the maximum expected thickness of the film of water flowing out of said respective tray at the overflow.