Abstract: Boiler for generating steam and comprising a furnace wall defining a furnace, a casing wall concentrically encircling the furnace wall and jointly with the furnace wall defining a substantially annular interspace, steam consucting tubes positioned at the furnace wall and the casing wall and being in connection with top and bottom annular vessels and a flue gas aperture in the furnace wall for establishment of connection from the furnace to the annular interspace. At least one of the two walls, i.e. the furnace wall and the casing wall, and perferably both of the walls, i.e. the furnace wall as well as the casing wall, is constituted by steam generating tubes connected by intermediate flanges. Thus, a boiler is provided which is more stable than the prior art boilers and which is not limited to a certain maximum length, but may be provided in any length or size for obtaining the desired effect. In addition, the boiler shows other advantages in comparison with prior art boilers as e.g.

Abstract: A water-tube boiler is disclosed, comprising a body in which are located the furnace and a series of vertical tubes serving as heating and exchange surface between the furnace and the water to be heated flowing through these tubes, two respectively upper and lower manifolds to which the tubes are connected, and further comprising two independent water flows, one through the upper manifold to which the outgoing and return ducts of the heating circuits are connected, the other caused by thermosiphon action inside the tubes and the upper and lower manifolds.

Abstract: A heat exchanger for cooling a hot, high pressure gas and utilizing the heat removed therefrom for generating hot water comprising a first and a second vertically elongated pressure containment vessels, the second vessel disposed coaxially within the first vessel so as to establish an annular space between the outer surface of the second vessel and the inner surface of the first vessel. A gas inlet pipe penetrates through the bottom of the first vessel opening into the second vessel at the bottom thereof and a gas outlet pipe penetrates through the top of the first vessel opening into the second vessel at top thereof, thereby providing a passageway for the hot gas to flow through the second vessel. Water is circulated through the annular space between the first and second vessels and heated therein as it absorbs heat lost by the hot gas passing through the second vessel.

Abstract: A heat exchanger for central heating in which water to be heated passes through a circular array of parallel tubes. Hot gas passes over the outside of the tubes and heats the water up. Metal wire interlaces the tubes and helps conduction heat from the gas to the water. Preferably the arrangement of tubes and wires is metal coated to further help the heat conduction.

Abstract: A boiler device comprises a cold water input for supplying cold water through a feed water heating system. A bottom ring is spaced from and positioned below the heating system for producing uniform distribution of feed water. A delivery pipe supplies heated water from the heating system to the bottom ring. The delivery pipe extends from the heating system to a point spaced from and above the bottom ring. A generating coil system is provided above the bottom ring for heating water supplied from the bottom ring and producing steam. A superheater coil system is provided above the generating coil system for superheating steam. Incline headers between the generating coil system and the superheater coil system supply steam from the generating coil system to the superheater coil system. A standpipe supplies superheated steam from the superheater coil system to an upper ring above the superheater coil system for storing superheated steam.

Abstract: A heat exchanger which includes a core of heat transmitting metal having a plurality of cylindrical passages directed therein. Heat supply means, such as a combustion chamber, is associated with the core and a heat transfer medium, such as water, is introduced into the passages in a spiral manner wherein the medium rotates within the passages to reduce boundary effects improving heat transfer characteristics. The heat exchange is characterized by its ability to efficiently transfer heat in a concise configuration.