Abstract: A heat exchange cell is described comprising a containment casing comprising a rear wall, a front wall and a peripheral side wall, a helically-shaped heat exchanger comprising at least one tubular duct for the flow of a first heat transfer fluid coiled about a longitudinal axis of the helix according to a plurality of coils and mounted in the containment casing; a feeding zone of a second heat transfer fluid, intended for the heat exchange with the first heat transfer fluid, defined in the casing coaxially and internally with respect to the heat exchanger; a first chamber for collecting the second heat transfer fluid externally defined with respect to the heat exchanger between a radially outer wall thereof and the peripheral side wall of the containment casing; and a second chamber for collecting the second heat transfer fluid at least partially delimited by at least one separating element.

Abstract: The heat exchanger (1) comprises a helical flow conduit (8) for a liquid, made with a pipe (9) of extruded thermally conductive material, provided with a pair of facing and mutually parallel fins (13), which extend from a portion of the outer surface thereof. This pipe (9) is helically wound about a longitudinal axis (A-A) such as to form a sequence of adjacent turns (10) separated by interspaces (11) through which, during use, hot gases, in particular combustion fumes, flow. The fins (13) extend helically, towards the outside relative to the axis (A-A) of the helical conduit (8), and have respective pluralities of through-openings (20, 21) which interconnect the region (16) comprised between them and the interspaces (11, 14) defined with respect to the adjacent turns (10). Flow paths are thus defined through these fins (13), outside the helical conduit (9), for the hot gases which during use pass through the interspaces (11, 14) between the turns of the helical conduit (8).

Abstract: An underwater power supply system is provided with an ascending/descending station that ascends and descends underwater between the water depth at which an underwater moving body works and the vicinity of the water surface, and a charging station that supplies electrical power wirelessly to the ascending/descending station in the vicinity of the water surface. At the aforementioned water depth, the underwater moving body moves adjacent to the ascending/descending station, and electrical power is supplied wirelessly from the ascending/descending station to the underwater moving body.

Abstract: Methods and apparatus for a power and/or propulsion system comprising an external combustor, a steam generator, and a radial piston engine. In one embodiment, an undersea vehicle is powered by a propulsion system including a steam generator having a series of coiled tubes in which water is heated to generate steam by combustion of a monopropellant fuel ignited in the external combustor.

Abstract: Apparatuses and methods for producing steam are provided. A steam boiler system may include a steam boiler. The steam boiler may comprise an enclosure with a burner, first and second fluid conveyance members, and one or more radiants therein. The burner produces hot combustion gases which warm the fluid conveyance members and thereby the fluid therein. The radiants are also heated by the combustion gases, and they thereby emit radiation which is absorbed by the fluid conveyance members and/or the fluid therein. The boiler system may additionally comprise a steam separator which separates out a steam component. The steam component can be directed back through the enclosure in a third fluid conveyance member to expand the steam before being fed to a steam engine to produce power.

Abstract: Disclosed is a boiler for providing hot water to a heating system of a building and for simultaneously producing hot domestic water. This boiler comprises a heating tank provided with a water inlet and a water outlet through which water for use in the heating system circulates and an adjacent chamber annexed to the heating tank. This adjacent chamber is in direct communication with the heating tank and containing means for heating the water. The boiler also comprises a heat exchanger provided with a water inlet and a water outlet through which circulates the domestic water. This heat exchanger is made of a plurality of tubular coils of helicoidal shape that are located within the heating tank in order to allow heat transfer between the hot water within the heating tank and the domestic water that circulates within the tubular coils.

Abstract: Methods and apparatus for a power and/or propulsion system comprising an external combustor, a steam generator, and a radial piston engine. In one embodiment, an undersea vehicle is powered by a propulsion system including a steam generator having a series of coiled tubes in which water is heated to generate steam by combustion of a monopropellant fuel ignited in the external combustor.

Abstract: The present invention relates to laundry machines, and more particularly, to a steam generator for a laundry machine and a laundry machine with the same. The present invention provides a steam generator including a case having a space for turning water into steam, a heater for heating the water for generating the steam, and at least two overheating preventive means for preventing overheating of the heater, and a laundry machine with the same.

Abstract: A steam generator in a heat regenerative engine includes a cylindrical combustion chamber that encloses a circularly wound coil of densely bundled tubes. The tube bundle is heated by two combustion nozzle assemblies, each having an air blower, a fuel atomizer, and an igniter. The igniter burns atomized fuel that exits the atomizer and is mixed with preheated air. The flames and heat from the combustion nozzle assemblies are directed in a centrifuge within the circular combustion chamber. This cyclonic circulation of combustion gases within the combustion chamber creates higher efficiency in the engine by subjecting the coil of tubes to multiple passes of heat, thereby promoting greater heat saturation relative to the amount of fuel expended. The relatively small diameter and large surface area of the tubes in the bundle allows the water and steam in the tubes to be heated to higher temperatures and pressures within a compact space, providing a highly efficient steam generator.

Abstract: A vaporizer includes a pump for pumping liquid stored in a liquid store tank, a helical vaporizing tube, and a control system connected to two ends of the vaporizing tube for functioning to make the vaporizing tube produce high temperature so as to heat up swiftly liquid flowing through the helical vaporizing tube and finally vaporize liquid at the outlet end of the vaporizing tube, with the liquid in the helical vaporizing tube never reversely flowing back to the pump owing to low temperature of liquid at the inlet end of the helical vaporizing tube.

Abstract: Disclosed is a boiler apparatus useful for the heating of living and working spaces. The disclosed boiler apparatus incorporates a burner element and controller element that cooperate to provide a modulated firing rate. The modulated firing rate serves to increase the efficiency of the disclosed boiler apparatus. The boiler apparatus of the invention incorporates a heat exchanger and a combustion system. In operation, the control element collects and analyzes information from a multiplicity of sensors in order to modulate the firing rate of the burner element so as to maintain a selected output temperature for the water being heated. This monitoring activity by the control element also avoids short cycling of the boiler apparatus of the invention. The boiler apparatus of the invention also includes an indicator light that provides a visual indication the invention's operational status.

Abstract: Refinery process furnaces are disclosed that have horizontal-helical radiant coils and/or improved ladder-type supports for the horizontal tubes. The coils have a tubeside fluid flow path from an inlet pipe section through an alternating series of straight horizontal pipe sections and wide sweep return bends to an outlet pipe section. The horizontal pipe sections are arranged in at least two vertical banks that are parallel and horizontally spaced apart. The bent pipe sweep return bends are arranged in vertical banks at either end of the straight pipe banks. Each bend connects a pair of straight pipe sections in adjacent vertical banks, and each return bend is sloped between horizontal and vertical so that one of the straight pipe sections in the connected pair thereof is elevated with respect to the other. The ladder supports have two opposing columns with a number of vertically spaced support members each having a generally horizontal upper engagement surface.

Abstract: A heater includes a radiant section having a wall and a roof, the roof having a longitudinal opening. A radiant heat exchange tube is disposed in the radiant section, and the tube has an inlet and outlet through which a process fluid can be carried respectively into and out of the radiant section. The tube between the inlet and outlet is arranged in generally horizontal tube lengths. A plurality of burners is provided, at least two of the burners being disposed on opposing sides of the tube. A plurality of tube supports is releasably positioned at longitudinal intervals along the tube lengths and define tube seats on which the tube lengths rest. The tube and tube supports are liftable as a unit through the longitudinal opening of the roof of the radiant section.

Abstract: An integrated reburn system for a cyclone-fired boiler has a reburn fuel feed nozzle through a cyclone burner into the cyclone barrel, or furnace, at a region of low-velocity fuel and air movement. The reburn fuel is injected at high velocity and mostly does not mix with the combustion fuels and gases within the cyclone barrel. The reburn fuel passes through the re-entrant throat of the cyclone into the main furnace, where it forms a reburn zone having a reducing atmosphere in which the reburn fuel reacts with combustion gases from the main combustion zone to convert NO.sub.x to N.sub.2, thereby reducing the amount of NO.sub.x emissions produced by the furnace.

Abstract: A commercial water heater apparatus, including a housing, a radial-fired burner within the housing, a single continuous, multiple loop, finned coil tubing heat exchanger for circulating water around the burner, having at least a first set of inner coils forming a coil trough therebetween and a second set of outer coils nested within the coil trough formed by the inner set of coils, the outer set of coils forming a second coil trough around the exterior thereof, and a coil baffle interposed in the second exterior trough for deflecting heat adjacent to the second set of coils.

Abstract: A cyclone after-burner for cyclone reburn NO.sub.x reduction in a furnace has a retractable fuel pipe inside a lance extending along the cylindrical axis of the cyclone to a point near the re-entrant throat. The lance has a water-cooled jacket that is refractory covered to reduce heat absorption. The fuel pipe is adapted to provide gas, oil or pulverized coal for combustion in the furnace.

Abstract: A dual sleeve boiler is arranged to dispose a portion (72, 74, 76) of its fluid conduit between a support member (64) of the boiler and the heat generating portion (20, 24) of the boiler. The end of a conduit through which water is introduced to the boiler is disposed between an enclosing means (24) which forms an axial end of the boiler and a cylindrical tube (64) disposed through the center of the boiler for purposes of supporting the boiler. As relatively cool fluid is introduced into the conduit of the boiler, it passes between the heat generating portions (20) of the boiler and the support tube (64) and provides a thermal barrier to prevent heat from traveling, through conduction, into the supporting means (64) which is attached to an external support member (71). This prevents heat from flowing into the external support member (71) and possibly damaging heat sensitive components attached thereto.

Abstract: The invention relates to a gas-heated or kerosene-heated boiler for warm water, hot water or for steam generation having a substantially horizontal cylindrical combustion chamber defined and surrounded by a flue tube (1) consisting of a plurality of annular ring tubes (b 2) that are arranged in succession for conveying a suitable heat carrier and are held together by means of annular distance strips (3). At least some of the annular ring tubes have different inner cross sections and/or are arranged in a manner of having different, unequal spacing distances one to the next. Thus, a substantially uniform main diameter of the flue tube (1) is maintained, and despite of this, the flow of heat carrier circulated is harmonized with the thermal load which is non-equally distributed along the axis of the combustion chamber, resulting in improved utilization of the heat energy radiation at substantially constant wall temperature along the flue tube (1).

Abstract: A heat pump assembly comprises a refrigeration circuit including an evaporator, a compressor and a capacitor, and an internal combustion engine for driving the compressor and being coupled therewith by a detachable coupling. A heating circuit is disposed in communication with the capacitor and includes a space heat exchanger for the heating of space by heat absorbed from the capacitor, and further includes the engine, a heat exchanger in a communication with an exhaust pipe extending from the engine, and a retarder driven by the engine for the torque loading of same. Space is thus further heated by the engine and the emissions therefrom, and the retarder comprises an electric braking arrangement by which energy to be dissipated is converted into heat by eddy currents produced in a solid conductor.