Abstract:
The invention provides for a manufacturing process of a heat exchanger having a flat tube and fin core. The flat tube and fin core is formed in such a way that free flat tube ends are provided, wherein the flat tube and fin core is brazeed in a brazing furnace, and wherein the flat tube ends are received in receptacle openings of a mounting plate and a header forming an enclosed space for receiving a bonding agent for coupling the flat tube ends to the header and mounting plate.
Abstract:
A number of flat tubes, flat tube heat exchangers, and methods of manufacturing both are described and illustrated. The flat tubes can be constructed of one, two, or more pieces of sheet material. A profiled insert integral with the flat tube or constructed from another sheet of material can be used to define multiple flow channels through the flat tube. The flat tubes can be constructed of relatively thin material, and can be reinforced with folds of the flat tube material and/or of an insert in areas subject to higher pressure and thermal stresses. Also, the relatively thin flat tube material can have a corrosion layer enabling the material to resist failure due to corrosion. Heat exchangers having such flat tubes connected to collection tubes are also disclosed, as are manners in which such tubes can be provided with fins.
Abstract:
A number of flat tubes, flat tube heat exchangers, and methods of manufacturing both are described and illustrated. The flat tubes can be constructed of one, two, or more pieces of sheet material. A profiled insert integral with the flat tube or constructed from another sheet of material can be used to define multiple flow channels through the flat tube. The flat tubes can be constructed of relatively thin material, and can be reinforced with folds of the flat tube material and/or of an insert in areas subject to higher pressure and thermal stresses. Also, the relatively thin flat tube material can have a corrosion layer enabling the material to resist failure due to corrosion. Heat exchangers having such flat tubes connected to collection tubes are also disclosed, as are manners in which such tubes can be provided with fins.
Abstract:
A number of flat tubes, flat tube heat exchangers, and methods of manufacturing both are described and illustrated. The flat tubes can be constructed of one, two, or more pieces of sheet material. A profiled insert integral with the flat tube or constructed from another sheet of material can be used to define multiple flow channels through the flat tube. The flat tubes can be constructed of relatively thin material, and can be reinforced with folds of the flat tube material and/or of an insert in areas subject to higher pressure and thermal stresses. Also, the relatively thin flat tube material can have a corrosion layer enabling the material to resist failure due to corrosion. Heat exchangers having such flat tubes connected to collection tubes are also disclosed, as are manners in which such tubes can be provided with fins.
Abstract:
Die Erfindung betrifft ein Herstellungsverfahren für Flachrohre, aus wenigstens einem Streifen endlosen Bandmaterials (Bb) mit wenigstens einem Wandteil (a) und einem mit Wellen ausgebildeten Innenteil (c), auf einer mit Walzenpaaren ausgerüsteten Walzenstraße, wobei der Streifen in Längsrichtung (LR) durch die Walzen läuft und umgeformt wird, wobei das mit Wellen ausgebildete Innenteil (c) zwischen das umgeformte Wandteil (a, b) gebracht wird, wonach das Schließen des Flachrohrs durchgeführt wird. Die Herstellung der Flachrohre wird erfindungsgemäß dadurch vereinfacht, dass in Längsrichtung (LR) des Streifens (c) laufende beabstandete Bandverdünnungslinien (B) hergestellt werden und dass in den Bandverdünnungslinien (B) liegende Wellenberge (Wb) und Wellentäler (Wt) ausgebildet werden.
Abstract:
A number of flat tubes, flat tube heat exchangers, and methods of manufacturing both are described and illustrated. The flat tubes can be constructed of one, two, or more pieces of sheet material. A profiled insert integral with the flat tube or constructed from another sheet of material can be used to define multiple flow channels through the flat tube. The flat tubes can be constructed of relatively thin material, and can be reinforced with folds of the flat tube material and/or of an insert in areas subject to higher pressure and thermal stresses. Also, the relatively thin flat tube material can have a corrosion layer enabling the material to resist failure due to corrosion. Heat exchangers having such flat tubes connected to collection tubes are also disclosed, as are manners in which such tubes can be provided with fins.
Abstract:
The description relates to a process for producing optically active hydroxamic acids of the general formula (I) in which R , R and R are different and represent a cyclic or linear, aliphatic or aromatic, substituted or unsubstituted hydrocarbon radical which may contain hetero-atoms, characterised in that a racemate of chiral amides, carboxylic acid esters or caboxylic acids of the general formula (II) in which R , R and R are defined as above and X is -NH2, -OR or -OH, R being any organic radical, is reacted with hydroxyl amine NH2OH in the presence of an acyl transferase and the optically active hydroxamic acid (I) thus produced is separated from the unreacted enantiomer of the general formula (II). The optically active hydroxamic acid thus obtained can be converted to the corresponding optically primary amines by Lossen transposition.
Abstract:
A number of flat tubes, flat tube heat exchangers, and methods of manufacturing both are described and illustrated. The flat tubes can be constructed of one, two, or more pieces of sheet material. A profiled insert integral with the flat tube or constructed from another sheet of material can be used to define multiple flow channels through the flat tube. The flat tubes can be constructed of relatively thin material, and can be reinforced with folds of the flat tube material and/or of an insert in areas subject to higher pressure and thermal stresses. Also, the relatively thin flat tube material can have a corrosion layer enabling the material to resist failure due to corrosion. Heat exchangers having such flat tubes connected to collection tubes are also disclosed, as are manners in which such tubes can be provided with fins.
Abstract:
A number of flat tubes, flat tube heat exchangers, and methods of manufacturing both are described and illustrated. The flat tubes can be constructed of one, two, or more pieces of sheet material. A profiled insert integral with the flat tube or constructed from another sheet of material can be used to define multiple flow channels through the flat tube. The flat tubes can be constructed of relatively thin material, and can be reinforced with folds of the flat tube material and/or of an insert in areas subject to higher pressure and thermal stresses. Also, the relatively thin flat tube material can have a corrosion layer enabling the material to resist failure due to corrosion. Heat exchangers having such flat tubes connected to collection tubes are also disclosed, as are manners in which such tubes can be provided with fins.
Abstract:
A number of flat tubes, flat tube heat exchangers, and methods of manufacturing both are described and illustrated. The flat tubes can be constructed of one, two, or more pieces of sheet material. A profiled insert integral with the flat tube or constructed from another sheet of material can be used to define multiple flow channels through the flat tube. The flat tubes can be constructed of relatively thin material, and can be reinforced with folds of the flat tube material and/or of an insert in areas subject to higher pressure and thermal stresses. Also, the relatively thin flat tube material can have a corrosion layer enabling the material to resist failure due to corrosion. Heat exchangers having such flat tubes connected to collection tubes are also disclosed, as are manners in which such tubes can be provided with fins.