EP 0547363 B2 19970806 - Metal heat-exchanger tube for cooling viscous fluids
Title (en)
Metal heat-exchanger tube for cooling viscous fluids
Title (de)
Metallisches Wärmeaustauscherrohr zur Kühlung von zähen Medien
Title (fr)
Tube métallique d'un échangeur de chaleur pour refroidir des fluides visqueux
Publication
Application
Priority
DE 4141240 A 19911214
Abstract (en)
[origin: EP0547363A1] The invention relates to a metal heat-exchanger tube (1) having integral fins (2 or 3), running round on the outside and inside in the shape of a helix, for cooling viscous fluids (4), in particular oil in servo circuits of vehicles, the fluid (4) to be cooled flowing through the tube (1) and the outside thereof being cooled by air (5). A discontinuous rise in heat removal is achieved according to the invention by the following features: a.) the ratio of the external heat transfer area Aa of the tube (1)/internal heat transfer area Ai of the tube (1) is: <IMAGE> b.) the relationship: <IMAGE> holds for the clear internal diameter di of the tube (1), with internal diameter di (mm), volumetric <IMAGE> of the fluid (4) (m<3>/h), kinematic viscosity nu (mm<2>/s). <IMAGE>
IPC 1-7
IPC 8 full level
F28F 1/42 (2006.01)
CPC (source: EP)
F28F 1/42 (2013.01); F28F 1/422 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0547363 A1 19930623; EP 0547363 B1 19950524; EP 0547363 B2 19970806; DE 4141240 A1 19930617; DE 4141240 C2 19930930; DE 59202339 D1 19950629; ES 2074795 T3 19950916; ES 2074795 T5 19971101
DOCDB simple family (application)
EP 92119096 A 19921107; DE 4141240 A 19911214; DE 59202339 T 19921107; ES 92119096 T 19921107