Abstract: Disclosed is a heat exchanger, particularly a charge-air/coolant radiator (1), having a disk-type structure. Said heat exchanger comprises a plurality of disks (2) which are penetrated by a coolant and a fluid that is to be cooled. The inlet zone and/or outlet zone for the fluid that is to be cooled is/are expanded at least at the discharge end or delivery end.

Abstract: Disclosed is a device for exchanging heat, especially for cooling the combustion air of internal combustion engines in motor vehicles, which is characterized by the fact that the flow devices (14) are accommodated in a profiled housing (6) comprising at least two parts. The cross section of a first housing part (6a) is essentially U-shaped, said basic shape being closed at the open end of the first housing part (6a) by means of a second, substantially planar housing part (6b). The inventive device is further characterized by the fact that the housing (6) comprises at least one inlet flange and at least one outlet flange for the second medium at two opposite side while the flow devices (14) are kept at a distance from each other in at least one area by means of at least one frame device (12) which is accommodated within the housing (6).

Abstract: A plate heat exchanger comprising a plurality of plates (12,13) which are stacked against each other and which are of a first and second type in order to form flow channels for a first and second medium. The plates form a heat exchanger block (2) with an upper side and a lower side and with two opposite side surfaces (10) and front faces (9). The first flow channels are peripherally sealed for the first medium and are fluidically connected to distributor and collector channels which are arranged in a vertical position with respect to the plate plane and which lead into inlet and outlet connection pieces (6,7) which are respectively arranged on the upper side and/or lower side (3,11). The second flow channels are open at the front surfaces (9) thereof and are sealed at the side surfaces (10) thereof. The open sides (9) form an inlet and outlet plane for the second medium.

Abstract: The invention relates to a stacked panel-shaped heat transmitter comprising a plurality of interstacked trough-shaped panels (23,24) of a first and second type forming therebetween flow channels (25,26) for a first medium at a first height h and for a second medium at a second height H. The panels (23,24) have erect peripheral edges which are soldered to each other, the height thereof being different for the first and second type of panel. According to the invention, the first type of panel (23) has an edge (23a) corresponding to height h1 and a flank angle A. The second type of panel (24) has a higher edge which consists of at least three sections (24a, 24b, 24c), the height thereof being H1, H2 and H3. The first edge section (24a) corresponding to a height H1 and the third edge section (24c) corresponding to a height H3 respectively have a flank angle ?. The second edge section (24b) corresponding to height H2 extends vertically in relation to the base of the panel (24e).

Abstract: The invention relates to a multi-chamber tube, produced from a flat sheet (2), welded along the longitudinal surfaces with two planar face surfaces (5, 6), two curved narrow sides (3, 7) and webs (8), folded from the flat strip (2) which divide adjacent (chambers (9, 10) and which are soldered to the opposing tube inner wall (6) and a method for production thereof. According to the invention, the flat strip (2) comprises inward projections (15) in the region of the soldering of the webs (8).

Abstract: Large-sized calcium nitrate tetrahydrate particles are obtained by dissolving phosphate rock in concentrated nitric acid, cooling the resulting solution, intentionally terminating the crystallization of the calcium nitrate tetrahydrate when only 40 to at most 60% of the calcium in solution has been crystallized, to form a mother liquor, recovering a portion of the mother liquor equivalent to 20 to 80% of the solution by removing the calcium nitrate crystals therefrom; combining the remainder of the suspension with the separated mother liquor and recovering the crystals with a particle size of from 70 to 1100 microns.