An improved compact heating system, particularly adapted for heating water and for steam generation, includes a combustible gas supply zone, a combustion chamber therearound in the form of a burner element comprising a refractory cup in heat exchange relation with an array of heat exchange elements spaced peripheral therefrom, and gas ignition means. The system is adapted to efficiently burn a high velocity stream of combustible gases and develop a wide range of B.t.u. outputs per hour, including multi-million B.t.u. outputs, while providing advantages of larger types of heating systems, including easy access for maintenance, repair, replacement and clean-up.
A steam generator has a wound flow pipe which forms an enclosure structure that surrounds an inner chamber, an inner housing which surrounds the jacket and forms therewith a first annular gap for guiding exhaust gas from a burner, an intermediate housing which surrounds the inner housing and forms therebetween a second annular gap through which a combustion air flows to the burner and is heated by the exhaust gas in the first annular gap, and an outer housing which surrounds the intermediate housing and forms a third annular gap through which the combustion air is aspirated from the third gap and is preheated by the combustion air in the second annular gap.
A heat transfer system in which circulation of a liquid through a heat exchanger is achieved by having risers filled with fluid consisting of a liquid which partly vaporizes on heating and rises to a condensing region where a heat exchanger, positioned in close proximity to the upper ends of the risers, condenses the vapor portion of the fluid. A downcomer returns the condensed liquid to the lower ends of the risers so that continuous circulation of the fluid through the heat exchanger occurs automatically when heat is supplied to the risers.
A power burner, fin tube heat exchanger includes a plurality of parallel fin tubes connected at each end with a manifold to define a combustion chamber or enclosure. A gas and air mixture is provided to the enclosure by a blower and ignited. A flue gas collector enshrouds the fin tube enclosure and provides an exhaust path for the combusted flue products.
There is disclosed a gas-fired water heater/boiler apparatus with a unique burner assembly that provides high levels of BTU/hour input making it suitable for commercial installations. The gas burner includes a pair of superimposed tubes, each having evenly distributed perforations of a different uniform size, that are rolled flush together and provide a thick walled burner with greatly increased strength and resistance to premature failure while furnishing an optimum flame pattern. The gas burner projects into the interior of a vertical, cylindrical array of finned heat enchanger tubes through which the fluid to be heated is circulated. The water heater/boiler apparatus is compact and thermally insulated by a ressurized forehearth and may be installed on combustible floors or in closets with zero clearance.
