Abstract: A fuel supply assembly which receives a supply of liquid fuel feedstock including hydrocarbons having higher and lower hydrocarbon content and high molecular weight sulfur-containing compounds, the higher hydrocarbon content and high molecular weight sulfur containing compounds being less volatile that the lower hydrocarbon content. The fuel supply assembly supplies fuel to a fuel cell assembly and has a housing unit adapted to house the liquid fuel feedstock so that the liquid fuel feedstock is subjected to vaporization conditions to allow at least a portion of the liquid fuel feedstock to vaporize to form fuel feedstock vapor, the vaporization conditions being such that the concentration of lower hydrogen content is higher and the concentration of higher hydrocarbon content and high molecular weight sulfur containing compounds is lower in the fuel feedstock vapor than in the liquid fuel feedstock.

Abstract: The present invention is directed to an apparatus for heating hot water. The present apparatus utilizes at least two individual hollow conduits that pass through the interior of a hot water tank. Independent inshot gas burners mounted in the conduits pass hot air through the hollow conduits warming the water surrounding the conduits. The conduits are organized in the interior of the tank in such a manner as to create distinct differential temperature zones. Each such temperature zone has an associated hot water outlet. The inshot burners are regulated to maintain the temperature zones. In this manner, the user is able to utilize the advantages of an internal coil heating system but has the ability to draw steady supplies of water of varying temperatures from the tank which is critical for many modern residential and commercial hot water and hydronic systems.

Abstract: A wet base boiler of the multi-sectioned type, that is, a boiler in which the fire box is surrounded by water. Each heat exchanger section of the boiler being arranged and constructed to provide an improved heat transfer surface when contacted by the heated gases emanating from the fire box. The heat transfer surface of each section comprises opposing parallel walls having a plurality of equispaced ribs disposed thereon to define a curvilinear path between adjacent ribs, the ribs formed on one wall of a heat exchanger section being antisymmetrical with the ribs formed on the opposing wall of the heat exchanger section, each rib of each wall having spaced fins or cusps and each fin or cusp having a height so as to be spaced from the fins branching from the ribs of an adjacent heat exchanger section.

Abstract: A boiler which is primarily designed for the central heating of apartments has two separable elements constituted by the boiler furnace and a heat exchanger. The heat exchanger of single-unit construction surmounts a completely open section of the boiler furnace and carries a gas or fuel-oil burner, the flame of which is directed away from the internal surface of the heat exchanger and follows a curved path within the combustion chamber. Except for the open section which carries the exchanger, the boiler furnace is completely surrounded by a jacket for the circulation of heat-transporting fluid.