The apparatus for cooking food with superheated steam includes an external casing (2) comprising inside a cooking chamber (4), suitable for containing one or more foods; a steam generating device (30), capable of vaporizing a liquid; a superheating device (31) of said steam associated with said steam generating device (30), said superheating device (31) being configured to heat said steam up to an operating temperature (T) higher than the boiling temperature of said liquid and to enable said superheated steam to come out towards said cooking chamber (4).

The present disclosure relates to a feedforward structure for controlling water level, in particular to a feedforward structure for controlling a steam drum water level in a steam turbine FCB test and a control method therefor. The feedforward structure includes a steam drum provided with a steam drum water level measurement sensor therein, a feed water pipe provided with a feed water flow measurement sensor therein, and a steam inlet pipe provided with a steam flow measurement sensor therein. A steam drum water level measurement value I in the steam drum water level measurement sensor is compared with a set value of the steam drum water level.

The present invention relates to bathing devices for special therapeutic or hygienic purposes such as e.g. sauna or Finnish baths, and especially to a steam generator element for a sauna electric heater and a sauna electric heater. A sauna electric heater (13) according to the present invention comprises comprising a frame part (14), heating resistor elements (15-17), (29), (30), (54), (55) inside the said frame part (14), and sauna stones (2) arranged inside the said frame part (14) and/or on the top part of the said sauna electric heater (13), which said sauna electric heater (13) comprises a steam generator element (18), (19), (26), (33), (37), (45), (52), (62) placed inside the said frame part (14) between at least two heating resistor elements (15-17), (29), (30), (54), (55) and/or said sauna stones (2), said steam generator element (18), (19), (26), (33), (37), (45), (52), (62) comprising a water tank (20), (27), (38), (46), (53) fillable with water. The sauna electric heater according to the present invention provides more durable operation and with less generated faults and brake ups when compared to the prior art solutions.

A low water sensor testing device having an initial piping unit connected to a hot water boiler and also connected to a first three way purge valve unit, which valve unit is, in turn, connected to a T-shaped piping unit and affixed within the stem portion of which there is a low water level sensor unit with the T-shaped piping unit being further connected to a second three way purge valve unit, wholly equivalent to the first valve unit, with the second valve unit being connected to an adapter unit, in turn, also connected to outflow piping carrying boiler heated water via outflow piping to the heating system of a residential or commercial structure.

The apparatus for cooking food with superheated steam includes an external casing (2) comprising inside a cooking chamber (4), suitable for containing one or more foods; a steam generating device (30) associated with said casing (2), capable of vaporizing a liquid; a superheating device (31) of said steam associated with said steam generating device (30), said superheating device (31) being configured to heat said steam up to an operating temperature (T) higher than the boiling temperature of said liquid and to enable said superheated steam to come out towards said cooking chamber (4).

A steam generating apparatus includes a canister having a water inlet and a steam outlet. The steam generating apparatus includes a barrier in the canister dividing the canister into a lower chamber and an upper chamber. The lower chamber is positioned to receive water from the water inlet. The steam outlet valve receives steam from the upper chamber. The barrier has apertures for steam to pass from the lower chamber to the upper chamber and allows for condensation to pass from the upper chamber to the lower chamber. The steam generating apparatus includes a heating element configured to apply heat to a portion of lower chamber. The steam generating apparatus includes a controller configured to modify the flow rate of water through the water inlet to keep a water level above the heating element and below the steam outlet.

A steam generating apparatus includes a canister having a water inlet and a steam outlet. The steam generating apparatus includes a barrier in the canister dividing the canister into a lower chamber and an upper chamber. The lower chamber is positioned to receive water from the water inlet. The steam outlet valve receives steam from the upper chamber. The barrier has apertures for steam to pass from the lower chamber to the upper chamber and allows for condensation to pass from the upper chamber to the lower chamber. The steam generating apparatus includes a heating element configured to apply heat to a portion of lower chamber. The steam generating apparatus includes a controller configured to modify the flow rate of water through the water inlet to keep a water level above the heating element and below the steam outlet.

A method of estimating fluid in a steam generation system includes periodically determining steam flow rates and drainage flow rates to accurately estimate fluid levels. The method includes determining a first steam flow rate of a steam generator. Before a present steam cycle, determine a starting quantity of liquid in one or more liquid reservoirs. During a present steam cycle, determine a quantity of liquid remaining in the one or more liquid reservoirs by determining a time the steam generator injected steam and multiplying the time by the first steam flow rate. Based on the first steam flow rate, determine a time remaining before the quantity of liquid remaining in the one or more liquid reservoirs is below a threshold and the one or more liquid reservoirs needs to be refilled. With the drain flow rate, the steam generation system can be emptied with minimized dry cycle duration.

A method of estimating fluid in a steam generation system includes periodically determining steam flow rates and drainage flow rates to accurately estimate fluid levels. The method includes determining a first steam flow rate of a steam generator. Before a present steam cycle, determine a starting quantity of liquid in one or more liquid reservoirs. During a present steam cycle, determine a quantity of liquid remaining in the one or more liquid reservoirs by determining a time the steam generator injected steam and multiplying the time by the first steam flow rate. Based on the first steam flow rate, determine a time remaining before the quantity of liquid remaining in the one or more liquid reservoirs is below a threshold and the one or more liquid reservoirs needs to be refilled. With the drain flow rate, the steam generation system can be emptied with minimized dry cycle duration.

Provided are a method and system for improving control of a steam generator level for preventing oscillation of the steam generator level in a nuclear power plant. In order to prevent oscillation of a steam generator level and resultant shutdown of a nuclear reactor, which may be caused when a high-level priority control function is frequently and repeatedly turned on/off as the steam generator level is excessively increased, by improving a feedwater control system in the nuclear power plant, a proportional integral control value may be controlled to be reduced, and thus, output while a certain condition is met after a high-level priority mode is deactivated or a signal instructing to enter the high-level priority control mode may be controlled not to be output.