EP 2491316 A1 20120829 - DOWNHOLE HEAT EXCHANGER FOR A GEOTHERMAL HEAT PUMP
Title (en)
DOWNHOLE HEAT EXCHANGER FOR A GEOTHERMAL HEAT PUMP
Title (de)
ERDWÄRMESONDE FÜR EINE GEOTHERME WÄRMEPUMPE
Title (fr)
SONDE GÉOTHERMIQUE POUR UNE POMPE À CHALEUR GÉOTHERMIQUE
Publication
Application
Priority
- DE 102009045882 A 20091021
- EP 2010065162 W 20101011
Abstract (en)
[origin: CA2777344A1] The invention relates to a downhole heat exchanger for extracting geothermal energy from a borehole, wherein the inner surface of the exchanger tube comprises the following roughness values: a) an arithmetic mean roughness Ra according to DIN EN ISO 4287 in the range of 1 to 15 µm, b) an averaged roughness Rz according to DIN EN ISO 4287 in the range of 8 to 80 µm, and c) a maximum roughness depth Rz1max according to DIN EN ISO 4287 in the range of 10 to 500 µm, comprising an improved precipitation film during operation, such that the entire surface of the exchanger tube is uniformly wetted.
IPC 8 full level
F24J 3/08 (2006.01)
CPC (source: EP US)
F24T 10/13 (2018.04 - EP US); F28F 13/185 (2013.01 - EP); Y02E 10/10 (2013.01 - EP US)
Citation (search report)
See references of WO 2011047979A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DE 102009045882 A1 20110428; AU 2010309960 A1 20120607; CA 2777344 A1 20110428; CN 102713458 A 20121003; CO 6531462 A2 20120928; EP 2491316 A1 20120829; JP 2013508658 A 20130307; KR 20120099015 A 20120906; MX 2012004571 A 20120608; RU 2012120569 A 20131127; US 2012199317 A1 20120809; WO 2011047979 A1 20110428; ZA 201202872 B 20121227
DOCDB simple family (application)
DE 102009045882 A 20091021; AU 2010309960 A 20101011; CA 2777344 A 20101011; CN 201080047689 A 20101011; CO 12065762 A 20120420; EP 10768913 A 20101011; EP 2010065162 W 20101011; JP 2012534621 A 20101011; KR 20127010174 A 20101011; MX 2012004571 A 20101011; RU 2012120569 A 20101011; US 201013502767 A 20101011; ZA 201202872 A 20120419