Abstract: There is provided a rotary type regenerative heat exchanger which can effectively prevent an air bypass leak or a gas bypass leak. A rotary type regenerative heat exchanger of the present invention has a rotor (4) rotating around a central shaft (2), a heat accumulator (8) which is constructed in a manner that an air (A) of being a heated fluid and a gas (G) of being a heating fluid filled in the rotor alternately pass therethrough by a rotation of the rotor to repeat heat accumulation and radiation, and a housing provided so as to house the rotor. Further, the rotary type regenerative heat exchanger comprises: a branch pipe (41, 47, 55) for taking out a part of the heating fluid; a seal gas fan (42, 48, 56) for pressurizing the taken-out heating fluid to a predetermined pressure; and a seal gas introducing duct (46, 52) which is provided in the housing so as to introduce the pressurized heating fluid into a predetermined space formed between the rotor and the housing.

Abstract: An automatic water heater system having, contained in a tank, a plurality of vertically extending spiral flame tubes surrounded by substantially vertically extending heat tubes which join the top ends of the spiral flame tubes to form a common exhaust outlet for both sets of tubes, thereby greatly increasing the surface area contact between the water and transfer medium. The heat tubes are especially designed to provide an outlet drain for possible condensation that can develop so as not to drain out through the flame tubes and onto the flame. A heat trap, to capture heat from the hot flue gases otherwise lost by normal passage up through the chimney, may be provided, as well as a blower in the exhaust outlet. The above described structure can be assembled either as a combination heating and storage tank in a single unit, or as a separate component heating unit connected to the storage tank located alongside it.

Abstract: A heat exchanger particularly for cooling of hot smoke gases with aggresive components by clean gas to be heated, has side walls having two spaced ends, bottom walls arranged at the ends of the side walls, a plurality of glass pipes extending substantially parallel to each other and to the side walls and arranged so that a smoke gas passes through the glass pipes, while a clean gas passes transversely to the latter, and flow passages extending along the side walls in direction of glass pipes and arranged for guiding the smoke gas.

Abstract: In a water heating system, vapor in the products of combustion gases is condensed in a secondary heat exchanger positioned in a housing with the primary heat exchanger and combustion chamber. The two heat exchangers are coaxial coils with the secondary coil surrounding the primary. Gases flow radially through the primary coil, axially along a baffle and then axially through the secondary coil at an increased velocity. The gas/air mixture is burned in a burner within the primary heat exchanger and the gas product are drawn through the exchangers by a blower. A water storage tank is designed to enhance stratification of hot water over cooler water. The cooler water is used to condense vapor in the secondary heat exchanger.

Abstract: A gas condenser apparatus and method is described employing two heat exchanger stages for condensing water vapor and other contaminates, such as organic solvents, out of hot air or other treated gas by means of a cooling gas which is provided by feeding back the treated gas through the cooling passages of such heat exchanger stages after removal of the water and solvents. The heat exchangers are of the counterflow type so that the treated gas and the cooling gas flow in opposite directions therethrough. Preferably, water vapor is removed from the treated gas by condensing it in the first stage and the solvents are removed by condensing them in the second stage thereby separating the condensed water and solvents. Auxiliary cooling coils are provided at the input of the first stage and at the output of the second stage for further cooling of the treated gas.

Abstract: In condensation heat transfer, the efficiency of heat transfer at the heat transfer surface is notably augmented by opposing at least one electrode across a prescribed space to the heat transfer surface and applying a high electric potential capable of producing a non-uniform electric field on the heat transfer surface thereby enabling the condensate liquid formed on the heat transfer surface to be attracted by virtue of the electric field to the electrode, formed into a liquid column and removed from the heat transfer surface.

Abstract: A heat exchanger having a flow of air therethrough adapted for use in refrigeration systems includes a heat exchange coil and a plurality of sheet-like fins. The coil is formed of a plurality of tubes having a cooling medium flowing therethrough. Each of the fins are provided with openings for receiving the tubes in heat transfer relationship. A plurality of tabs are arranged in a surrounding relationship around the lower portion of the openings on the tubes for preventing the blow-off of condensate drops forming on the underneath side of the tubes.

Abstract: An improved insert for a vertical tube condenser comprising a trunk having a plurality of upward extending branches of different lengths formed to have a dense uniform pattern of pick-off points over the tube surface so as to effectively pick-off, by capillary action, the great part of the condensate and to maintain a relatively thin average thickness of condensate on the surface.