A heat exchanger assembly including at least one coil shaped heat exchanger pipe assembly for passing through a fluid to be heated. The heat exchanger pipe assembly has an inlet and an outlet and includes coil windings extending concentrically around a coil axis. The heat exchanger assembly further includes a housing in which the heat exchanger pipe assembly is received, such that a flue gas transport gap extends between the heat exchanger pipe assembly and the circumferential wall. In use, hot flue gas passes the coil windings, thereby imparting the heat to the fluid present in the heat exchanger pipe assembly. The housing has a first and a second end wall which close off a first end and a second end of the circumferential wall. The second end wall includes a burner cover opening in which a burner cover can be mounted. The housing is made of plastic and the heat exchanger pipe assembly is clamped in axial direction between the first and the second end wall of the plastic housing.

An apparatus is provided for processing reusable fuel comprising a first-type cyclone cooler having a first configuration. The apparatus also provides one or more second-type cyclone coolers, wherein each one or more second-type cyclone coolers has a substantially identical second configuration to respective other one or more second-type cyclone coolers, wherein the second configuration is different than the first configuration. The apparatus may also provide an air cooled heat exchanger, a coil condenser and one or more bubblers. The first-type cyclone cooler and the one or more second-type cyclone coolers are connected. One of the one or more second-type cyclone coolers is connected to the air cooled heat exchanger. The air cooled heat exchanger is connected to the coil condenser. The coil condenser is connected to the one or more bubblers.

Disclosed herein is an integrated multiple heat exchange device and a fuel cell system using the same. The integrated multiple heat exchange device includes a plurality of heat exchangers for consecutively collecting heat contained in a plurality of gases that are present in the fuel cell system and that have different temperatures, wherein the plurality of heat exchangers are separated from each other, a porous separator is placed between the plurality of heat exchangers such that condensate is collected at a lowermost heat exchanger, and a coolant line penetrates a separator to pass through all the plurality of heat exchangers.

A heat exchange apparatus is provided with an indirect evaporative heat exchange section. An evaporative liquid is downwardly distributed onto the indirect section to indirectly exchange sensible heat with a hot fluid stream flowing within a series of enclosed circuits which comprise the indirect evaporative heat exchange section. An ideal flow rate for such evaporative liquid is between 2.0 and 4.0 gallons per minute per square foot of top surface area of the indirect heat exchange section.

A method for assembling a heat exchanger device of a refrigeration unit may include pushing a heat exchanger coil of the heat exchanger device over a refrigerant collecting vessel of the heat exchanger device. The method may also include fluidically connecting the heat exchanger coil to the at least one cover of the heat exchanger device. The method may further include pushing a tubular casing of the heat exchanger device over the heat exchanger coil, and deforming the tubular casing radially inward.

A heat exchanger for supplying heat includes a housing, a bundle of helical fin-coil tubes, and a flue channel. The housing includes a burner, a water inlet, a water outlet and a flue gas outlet. The burner is disposed on a top portion of the housing and connected to an air/gas mixture unit. The bundle of helical fin-tube coils is disposed tightly, circularly, and coaxially around the burner. The flue channel is disposed below the burner and is formed by a plurality of serpentine bent fin-tube coils. A flow of flue gas vents from the flue channel to the flue gas outlet. The water inlet is connected to the plurality of serpentine bent fin-tube coils which forms the flue channel below the burner. The plurality of serpentine bent fin-tube coils below the burner are connected to the bundle of helical fin-tube coils. The bundle of helical fin-tube coils are connected to the water outlet.

An external combustion engine including a burner element, a heater head, a piston cylinder containing a piston, a cooler and a crankcase. The crankcase includes a crankshaft, a piston rod connected to the piston, a drive mechanism for converting the linear motion of the piston rod to rotary motion of the crankshaft and a linear cross-head bearing that is connected rigidly to the piston rod at one end and to the drive mechanism at the other end. Also the external combustion engine includes a piston clearance seal and a piston rod seal unit that has floating rod seals. The piston includes a inner dome to reduce axial heat transfer via radiation and convection.

A Stirling cycle machine. The machine includes at least one rocking drive mechanism including a rocking beam having a rocker pivot, at least one cylinder and at least one piston. The piston is housed within a respective cylinder and is capable of substantially linearly reciprocating within the respective cylinder. The drive mechanism includes at least one coupling assembly. Also, a crankcase housing the rocking beam and housing a first portion of the coupling assembly is included. The machine also includes a working space housing the at least one cylinder, the at least one piston and a second portion of the coupling assembly. An airlock is included between the workspace and the crankcase and a seal is included for sealing the workspace from the airlock and crankcase. A burner and burner control system is also included for heating the machine and controlling ignition and combustion in the burner.

Unit (11) for feeding a reducing solution from the tank to the exhaust duct of an endothemiic engine is provided. The unit comprises a supporting head (13) arranged for being associated to an aperture provided in a reducing solution tank and a heating device (15) for heating the reducing solution contained in the tank. The heating device (15) extends from the supporting head (13) and is provided with a duct (17) for a heating fluid. The duct (17) is defined by a side wall (31) which, when the unit (11) is in use, is internally in contact with the heating fluid passing through the duct (17) and externally in contact with the reducing solution present in the tank. At least one portion of the wall (31) of the duct (17) is non-smooth inside and/or outside the duct.

The invention relates to a shell and tube heat exchanger (1) having a helical tube bundle (10) within a shell (20), that defines a shell space (200) surrounding the tube bundle (10). The tubes are helically coiled about a core pipe (100) in such a manner that there is formed at least one first section (11) and at least one second section (12), separate from the first section, that surrounds the first section (11). The two sections (11, 12) have in each case at least one associated inlet (E, E′) such that the two sections (11, 12) are able to be charged separately with the first medium.