Abstract: A system and method for configuring a water heater to drain condensate from combustion products is provided. The water heater comprises a water tank, a burner for producing combustion products, a flue extending through an interior of the water tank to receive the combustion products, and an exhaust passageway positioned downstream of the flue and extending outside of the water tank to exhaust the combustion products. The exhaust passageway includes a first portion and a second portion positioned at an elevation above the first portion. A bypass conduit is coupled to the exhaust passageway and positioned to direct condensate in the exhaust passageway from the second portion toward the first portion. A drain port is positioned at or an elevation below the first portion of the exhaust passageway to drain condensate from the exhaust passageway.

Abstract: A heat exchanger A1 includes: a case 2 surrounding a heat transfer tube 4; and a guide member 5 for guiding heating gas entering the case 2 through an intake vent 21 to a first space region 24A and then to a second space region 24B, the guide member 5, together with a wall portion 20b, defining therebetween a gap 25b in communication with a gap 25a between the wall portion 20b and the heat transfer tube 4 for allowing part of the heating gas having been guided to the first space region 24A to proceed into the second space region 24B through the gaps 25a and 25b. This arrangement performs efficient heat recovery from the heating gas by effectively utilizing the entire heat transfer tube 4 while alleviating a problem that the case 2 is partially heated to elevated temperatures.

Abstract: Provided is a boiler structure that allows for appropriate flow-rate distribution for each furnace wall by using a simple configuration without any moving parts in a wide thermal-load range of a furnace from a partial load to a rated load. In a boiler structure having a furnace water-wall formed of multiple boiler evaporation tubes and configured to generate steam by heating water inside the furnace when the water that is pressure-fed to the boiler evaporation tubes flows inside the tubes, the boiler structure includes a pressure-loss adjusting section, for an internal fluid, provided in an outlet connection tube that connects outlets of water walls obtained by dividing the furnace water-wall into multiple parts.

Abstract: A domestic combined heat and power system comprising a Stirling engine and water heater in the form of a supplementary burner. The exhaust gas from the Stirling engine is used to preheat combustible gas entering the Stirling engine and subsequently used to heat the water. The water heater has a helical water duct towards the periphery of a housing. Separate parts of this duct are heated, in series, by the exhaust gas from the Stirling engine and the supplementary burner firing radially outwardly through the helical duct.

Abstract: A heat pump type hot water supply apparatus includes a heat pump unit 2 for heating water, a hot water tank 1 for storing therein hot water heated by the heat pump unit 2, and a hot water supply heat exchanger 10 which is placed substantially over a vertical entirety of interior of the hot water tank 1 and in which water flows from lower side toward upper side. Water that has flowed out from the upper side of the hot water supply heat exchanger 10 is discharged out from the top portion of the hot water tank 1.

Abstract: A heat exchanger of a non-condensing storage type boiler for preventing condensation is provided. The heat exchanger include a heating water outflow port installed on an upper portion of the boiler, a heating water inflow port installed lower than the heating water outflow port, and an internal pipe extending spirally from the heating water inflow port and being installed in a water tube of the boiler. The internal pipe is connected to an extension pipe that extends through a re-entry outlet passing through a wall of the boiler to be connected with a re-entry inlet.

Abstract: An apparatus for cooling hot gas comprises: (i) a vertical elongated vessel provided with a cooling medium compartment comprising in use a first cooling medium, an inlet to supply fresh first cooling medium and a outlet for discharge of used first cooling medium, the vessel further provided with an inlet for hot gas and an outlet for cooled gas, at least one heat exchange tube, which heat exchange tube is positioned in the cooling medium compartment (and fluidly connects the inlet for hot gas and the outlet for cooled gas, (ii) said cooling medium compartment further comprising a vertical and centrally positioned open ended downcomer wherein said heat exchange tube is positioned in a space between the downcomer and the vessel wall, (iii) and wherein the heat exchanger tube is mounted at its upstream end in a tube plate and wherein the tube plate is provided with means to supply a second cooling medium to the exterior of the upstream end of the heat exchanger tube, means to discharge the used second cooling m

Abstract: The invention relates to a condensation heat exchanger. The inventive heat exchanger consists of two co-axial helicoidal tube bundles which are positioned end-to-end, one of said bundles (2a) serving as a primary exchanger and the other (2b) serving as a secondary exchanger. Each of the aforementioned bundles comprises a tube and/or a group of flat tubes which are mounted inside a gas-impermeable casing (1). Moreover, means are provided to circulate at least one fluid to he heated inside the tubes, the casing (1) being equipped with a gas exhaust sleeve (122). In this way, a first hot gas, known as the main gas, which is, for example, generated by a burner (6), passes radially through the voids in the bundles. A deflector system (7) ensures that said main hot gas first passes through the primary exchanger (2a) from inside outwards and, subsequently, the secondary exchanger (2b) from outside inwards, after which it is discharged from the exchanger through the above-mentioned sleeve (122).

Abstract: A water heater includes a sealed combustion chamber and one or more fans for raising pressure in the combustion chamber to increase efficiency of the water heater. The pressure permits a more restrictive baffle to be used in the flue compared to baffles used in atmospheric water heaters. The water heater may include a water temperature sensor that activates the fan without activating the burner if water temperature raises above a desired temperature. The water heater may also include pressure and vapor sensors to ensure the combustion chamber is properly sealed and there are no flammable vapors present prior to igniting the burner. The fans are relatively small and run off the same DC power that runs an electric gas valve. The fans may be, for example, 12 or 24 Volt fans with power inputs of about 10 Watts or less.

Abstract: A boiler for heating a flow capable medium, especially for heating water, comprising a boiler housing made from plastic and a heater protruding through a mounting hole in the boiler housing into the interior of the boiler housing, being fixated in the mounting hole through a fixation means. Furthermore the interior diameter of the mounting hole in the boiler housing is at least in sections approximately identical to the outer diameter of the heater and the heater has an unheated section in the area of the mounting hole.

Abstract: A water tube WT of a heat exchanger B includes a helical tube body 5 which includes a plurality of loops 50 arranged in the axial direction. At least one of the loops 50 includes an inclined tube portion which is inclined with respect to the axial direction and a non-inclined tube portion extending perpendicularly to the axial direction. The inclined tube portion is provided at each of opposite end regions s2a and s2b in a width direction crossing the axial direction, whereas the non-inclined tube portion is provided at an intermediate region S1 in the width direction. With this structure, the pitch p2 of the loops 50 is reduced. Therefore, by increasing the number of loops 50, high heat exchange efficiency is achieved without considerably increasing the size of the helical tube body 5.

Abstract: Methods and systems for evaluating the condition of a water tank having a powered anode protection system. The water heater includes a storage tank to hold water, a powered anode, and a control circuit. The control circuit includes a variable voltage supply, a voltage sensor, and a current sensor. The control circuit is configured to compare a measured parameter to a threshold. In some constructions, the threshold is indicative of a condition of the storage tank at which the powered anode is no longer able to protect the storage tank from corrosion. In other constructions, the threshold is predicative of a potential failure of the storage tank caused by corrosion. In some constructions, the control circuit is configured to estimate a time remaining until the predicted failure of the storage tank.

Abstract: Disclosed is a boiler which is easily convertible from a normal type oil boiler to a condensing type oil boiler or vice versa thereby reducing manufacturing costs for the boiler. A size and a weight of the boiler are reduced by vertically installing a latent heat exchanger in an outer housing of the boiler together with a combustion chamber and a main heat exchanger. The boiler includes a combustion chamber, a heat exchange section, and an outer housing. Coupling holes are formed in the outer housing, a circulation chamber is formed at a lower portion of the outer housing, a burner is provided at an upper portion of the combustion chamber so as to generate heat in a downward direction thereof, the combustion chamber is vertically installed in one of the coupling holes, and a lower portion of the combustion chamber is communicated with the circulation chamber. The heat exchange section includes first and second heat exchangers and is vertically installed in the outer housing adjacent to the combustion chamber.

Abstract: Disclosed is a hot water supplying apparatus having an auxiliary heat exchanger. The hot water supplying apparatus comprises: a heat exchanger including an inlet pipe for introducing heating water into the heat exchanger, and first, second, and third heat exchanging pipes connected to the inlet pipe and sequentially arranged; and an auxiliary heat exchanging device installed at an inlet port of the heat exchanger through which the heating water is introduced, the auxiliary heat exchanging device including a first auxiliary heat exchanging pipe connecting the inlet pipe to the first heat exchanging pipe, a second auxiliary heat exchanging pipe connecting the second heat exchanging pipe to the third heat exchanging pipe, and heat transfer fins for transferring heat energy from the second auxiliary heat exchanging pipe to the first auxiliary heat exchanging pipe.

Abstract: In a steam-heating apparatus in which a heating section formed in a heat exchanger is connected to a steam supply pipe for receiving supply of heating steam and connected also to a condensate-recovering unit for discharging condensate produced as a result of heating, the apparatus includes a steam ejector including a suction chamber connected to the heating section and an inlet for receiving supply of the steam. When the temperature of the heating section or between the heating section and the condensate-recovering unit is dropped by a predetermined value, steam is supplied from the steam supply pipe to the inlet of the steam ejector, and gas in the heating section is sucked into the suction chamber of the steam ejector.

Abstract: An instantaneous type fuel-fired water heater has a variable speed blower that discharges combustion air into a fuel burner utilized to heat water flowing through a heat exchanger portion of the water heater. A portion of the air discharged from the blower bypasses the burner and associated heat exchanger, flows around the heat exchanger, and then mixes with flue gases being discharged from the heat exchanger portion into the flue portion of the water heater. In this manner, such flue gases are cooled by the bypassing blower discharge air to an extent permitting the flue portion to be formed from a low cost plastic material instead of a high temperature metal material such as stainless steel.

Abstract: The embodiments of the present invention relate to a steam-hose device wherein the condensate accumulating in the steam-hose is in-line-discharged through a steam-trap. Embodiments of the present invention also relate to a process for in-line-discharging condensate accumulating in the steam-hose, through a steam-trap. Embodiments of the present invention further relate to a process for heating objects by spraying of steam or steam with another gas.

Abstract: In a steam-heating apparatus in which a heating section formed in a heat exchanger is connected to a steam supply pipe for receiving a supply of heating steam and connected also to a condensate recovering unit for discharging condensate produced as a result of heating, the apparatus includes a steam ejector including a suction chamber connected to the heating section and an inlet for receiving supply of steam. When the temperature of the heating section or between the heating section and the condensate recovering unit is dropped by a predetermined value, steam is supplied from the steam supply pipe to the inlet of the steam ejector, and gas in the heating section is sucked into the suction chamber of the steam ejector.

Abstract: In a steam-heating apparatus in which a heating section formed in a heat exchanger is connected to a steam supply pipe for receiving a supply of heating steam and connected also to a condensate recovering unit for discharging condensate produced as a result of heating, the apparatus includes a steam ejector including a suction chamber connected to the heating section and an inlet for receiving supply of steam. When the temperature of the heating section or between the heating section and the condensate recovering unit is dropped by a predetermined value, steam is supplied from the steam supply pipe to the inlet of the steam ejector, and gas in the heating section is sucked into the suction chamber of the steam ejector.

Abstract: A condensation heat exchanger adapted to interface with a gas or fuel-oil burner, the condensation heat exchanger including two coaxial tube bundles placed end-to-end, one of which acts as primary exchanger and the other of which acts as secondary exchanger. Each of these bundles include at least one of a tube or of a group of tubes arranged end-to-end, forming a helical coil, in which the wall of the tube(s) is produced from a material that is a good conductor of heat and has a flattened, oval cross section, the major axis of which is perpendicular or approximately perpendicular to the axis of the helix. The width of the gap separating two adjacent turns is constant and smaller than the thickness of the cross section, the bundles being mounted securely inside a gas-impermeable jacket.

Abstract: The water includes a tank 10 which includes dual cold water inlets 21a, 21b. One or other of the cold water inlets 21a, 21b is in use connected to a cold water supply line. The cold water inlets 21a, 21b extend through inlet pipes 21c, 21d within the tank 10 and join at a cold water junction 22. Extending upwardly for cold water is a tempering tube or pipe 31, 31a, 31b that extends within the tank to the upper region of the tank 10 where the cold water can mix with hot water being drawn from the tank and passing through one of a pair of hot water outlets 26a, 26b. Either of the water outlets 26a, 26b in use is connected to a hot water delivery line for supply of the tempered water.

Abstract: In a steam-heating apparatus in which a heating section formed in a heat exchanger is connected to a steam supply pipe for receiving supply of heating steam and connected also to a condensate recovering unit for discharging condensate produced as a result of heating, the apparatus includes a steam ejector including a suction chamber connected to the heating section and an inlet for receiving supply of the steam. When the temperature of the heating section or between the heating section and the condensate recovering unit is dropped by a predetermined value, steam is supplied from the steam supply pipe to the inlet of the steam ejector, and gas in the heating section is sucked into the suction chamber of the steam ejector.

Abstract: In a steam-heating apparatus in which a heating section formed in a heat exchanger is connected to a steam supply pipe for receiving supply of heating steam and connected also to a condensate recovering unit for discharging condensate produced as a result of heating, the apparatus includes a steam ejector including a suction chamber connected to the heating section and an inlet for receiving supply of the steam. When the temperature of the heating section or between the heating section and the condensate recovering unit is dropped by a predetermined value, steam is supplied from the steam supply pipe to the inlet of the steam ejector, and gas in the heating section is sucked into the suction chamber of the steam ejector.

Abstract: Waste heat from a steam cycle employing a steam boiler is used to heat water, on an on-demand basis, in a steam-to-water heat exchanger wherein the supply of steam into the heat exchanger is regulated so as to maintain the temperature of the heated water exiting the heat exchanger at a relatively constant pre-set temperature. Further waste heat may be recaptured from the steam boiler steam cycle by pre-heating the incoming cold water being fed into the steam-to-water heat exchanger in the on-demand water heater using the still-hot condensate from the condensation of the steam in the steam-to-water heat exchanger. A condensate-to-water heat exchanger may be employed to pre-heat the cold water infeed to the steam-to-water heat exchanger.

Abstract: A water heater which includes a heat exchanger having a first passage and a second passage connected with the first passage, a gas burner mounted within the first passage, a push blower having an outlet conmected with the gas burner for forcing air into the gas burner, and a water reservoir mounted surrounding the heat exchanger, whereby when the gas burner is turned on, the push blower will be turned on to force air into the gas burner thereby forcing combustion air generated from fire of the gas burner to move along the first passage and meanwhile the pull blower will be turned on to extract the hot air out of the second passage.

Abstract: A method and apparatus for sealing a combustion intake for a boiler from inside air is provided. A method and apparatus for providing a transition piece for venting fresh air to and combusted air away from a boiler is also provided. A method of connecting a transition piece to PVC, ABS OR CPVC ductwork is also provided.

Abstract: In a steam-heating apparatus in which a heating section (2) formed in a heat exchanger (1) is connected to a steam supply pipe (3) for receiving supply of heating steam and connected also to a condensate recovering unit (6) for discharging condensate produced as a result of heating, the apparatus includes a steam ejector (5) including a suction chamber (13) connected to the heating section (2) and an inlet for receiving supply of the steam. When the temperature of the heating section (2) or between the heating section (2) and the condensate recovering unit (6) is dropped by a predetermined value, steam is supplied from the steam supply pipe (3) to the inlet of the steam ejector (5) and gas in the heating section (2) is sucked into the suction chamber (13) of the steam ejector (5).

Abstract: A domestic gas storage water heater utilizes a plastic non pressure tank to deliver mains pressure hot water. The heater may be external or internal of the tank and has a heat out put of about 4-10 Mega joules per hour. A pressure transfer module uses the mains pressure of the incoming cold water to deliver hot water from the tank at mains pressure. The tank may be of larger storage capacity than conventional gas heaters and the arrangement ensures that the heated water in the tank is stratified into layers of different temperature. This enables an uninterrupted supply of hot water to be achieved.

Abstract: A water heater apparatus for providing energy efficient hot water. The water heater apparatus includes a tank having top, bottom, and side walls, and also having an upper portion and a lower portion, and further having a plurality of heat transferring chambers and ducts being disposed inside thereof; and also includes a plurality of pipes being disposed in the tank; and further includes a heat circulating assembly being connected to the tank for circulating water through the chambers; and also includes a heating assembly being connected to the tank for heating water inside the tank.

Abstract: A steamer for pastries and the pastries to be steamed thereby. The steamer includes primary and secondary receptacles, a lid, and a mold. The primary receptacle holds water therein that is turned into steam when the primary receptacle is heated. The lid selectively closing the primary receptacle. The secondary receptacle is steam permeable and holds the pastries to be steamed above the water in the primary receptacle, and is disposed in the primary receptacle. The mold contains the pastries and is hingedly attached to the secondary receptacle so as to allow the mold to pivot upwardly from the secondary receptacle for insertion of, and removal of, the pastries, and has a piece of perforated material that allows the steam to pass therethrough, as opposed to being trapped therein, and as result thereof, provides the pastries with a pleasing texture. The pastries include flour, yeast, sugar, milk, salt, and either butter or margarine.

Abstract: A burner apparatus includes a mounting head having a fuel inlet opening defined in the mounting head for receiving combustion air and fuel gas through the opening. An inner support structure is attached to the mounting head. The inner support structure defines an interior zone communicated with the fuel inlet opening of the head. An exterior layer of flexible woven heat resistant material is received about the inner support structure and defines an exterior flame attachment surface. The mounting head may include a radial opening defined therethrough. An igniter is located outside of the mounting head adjacent the radial opening so that the igniter is proximally spaced from a combustion zone surround the burner apparatus. The burner apparatus may include a plurality of foraminous back pressure plates located in the interior zone distal of the igniter for balancing the pressure of the fuel gas/combustion air mixture along the length of the burner.

Abstract: The present device relates to a combustion boiler having a fan part provided with a driving motor, a suction fan secured on a rotary shaft of the driving motor and disposed on a suction line, for forcedly sucking air in the room or from the outside, and an exhaust fan secured on the rotary shaft of the driving motor and disposed on an exhaust line, for forcedly exhausting an exhaust gas to the outside. Hence, the air in the room or from the outside is forcedly sucked to the suction line by means of the suction fan and the exhaust gas is forcedly exhausted to the exhaust line by means of the exhaust fan. In this way, the flowing of air is constantly kept in all of the suction, combustion and exhaust lines.

Abstract: A potable water temperature management system includes a device that produces waste heat and that has a primary purpose other than heating potable water. The waste heat from the device is used to heat potable water in a tank. A heat shedding system is activated when the temperature of the potable water in the tank exceeds a selected maximum temperature. An auxiliary energy transfer system may be activated to heat the potable water in the tank when the potable water in the tank falls below a selected minimum temperature. A controller may be used to monitor the temperature of the potable water in the tank and activate either the heat shedding system or the auxiliary energy transfer system based on the potable water temperature.

Abstract: The system uses principal radial tubes 4 which connect an inner, central arc 3 to an outer arc 2. A plurality of branches 5 emerge from these tubes 4 and then assume a radial geometry, forming secondary radial tubes which extend as far as the said outer arc 2. The system rests freely on the bottom of the tank.