EP 2071266 A4 20130123 - CORRUGATED HEAT EXCHANGER TUBE FOR HOT WATER SUPPLY
Title (en)
CORRUGATED HEAT EXCHANGER TUBE FOR HOT WATER SUPPLY
Title (de)
GEWELLTES WÄRMETAUSCHERROHR ZUR HEISSWASSERVERSORGUNG
Title (fr)
TUBE ONDULÉ POUR ÉCHANGEUR THERMIQUE DESTINÉ À UNE ALIMENTATION EN EAU CHAUDE
Publication
Application
Priority
- JP 2007066436 W 20070824
- CN 200610113027 A 20060908
Abstract (en)
[origin: EP2071266A1] The present invention relates to a hot water corrugated heat transfer tube that exchanges heat between its interior and exterior. A plurality of projections, each whose height (H1) is in the range of 0.5 mm - 1.5 mm is provided in at least one part of the inner surface of a portion positioned in a section of a corrugated heat transfer tube, where the Reynolds number (Re) of the fluid flowing in the interior of the tube is less than 7,000. The height H1 of the projections is in the range of 0.05 - 0.15 times the inner diameter D or the height H1 of the projections is in the range of 1 - 3 times the depth (Hm) of the corrugated grooves. As a result, with a simple structure, the heat transfer performance in the low Reynolds number zone is improved, and the pressure loss inside the tube is small.
IPC 8 full level
F28D 7/02 (2006.01); F28F 1/10 (2006.01); F28F 1/40 (2006.01); F28F 13/12 (2006.01)
CPC (source: EP KR US)
F28D 7/02 (2013.01 - KR); F28F 1/30 (2013.01 - KR); F28F 1/40 (2013.01 - KR); F28F 1/42 (2013.01 - EP US); F28F 1/426 (2013.01 - EP US); F28F 13/12 (2013.01 - KR)
Citation (search report)
- [X] CN 1740729 A 20060301 - UNIV TSINGHUA [CN]
- [X] EP 0165583 A2 19851227 - HITACHI LTD [JP], et al
- [X] FR 2174872 A1 19731019 - UNIVERSAL OIL PROD CO [US]
- See references of WO 2008029639A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2071266 A1 20090617; EP 2071266 A4 20130123; AU 2007292663 A1 20080313; AU 2007292663 B2 20100812; CN 1924507 A 20070307; JP 4768029 B2 20110907; JP WO2008029639 A1 20100121; KR 20090055604 A 20090602; US 2009250198 A1 20091008; WO 2008029639 A1 20080313
DOCDB simple family (application)
EP 07792965 A 20070824; AU 2007292663 A 20070824; CN 200610113027 A 20060908; JP 2007066436 W 20070824; JP 2008533094 A 20070824; KR 20097006255 A 20090326; US 44018607 A 20070824