GB1523942A - Heat-transfer wall for condensation and method of manufacturing the same - Google Patents
Heat-transfer wall for condensation and method of manufacturing the sameInfo
- Publication number
- GB1523942A GB1523942A GB101276A GB101276A GB1523942A GB 1523942 A GB1523942 A GB 1523942A GB 101276 A GB101276 A GB 101276A GB 101276 A GB101276 A GB 101276A GB 1523942 A GB1523942 A GB 1523942A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grooves
- ridges
- notches
- heat
- transfer wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/04—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by preventing the formation of continuous films of condensate on heat-exchange surfaces, e.g. by promoting droplet formation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Metal Extraction Processes (AREA)
Abstract
1523942 Heat transfer wall for condensation HITACHI Ltd and HITACHI CABLE Ltd 12 Jan 1976 [13 Jan 1975 22 Sept 1975] 01012/76 Heading F4S [Also in Division B3] A heat-transfer wall for vapour condensation thereon has a surface comprising ridges 3 with grooves 2 there between, the edges of the ridges 3 having notches 4 therein of less depth than the grooves. Peaks 5 between the notches 4 may be bent over (as illustrated in Fig. 3, not shown) so as partly to cover the grooves 2. The surface may be (a) the outer surface of a copper tube used in a refrigerator, (b) the inner surface of a heat pipe or (c) a flat surface of a plate. In providing the surface on the outside of a copper tube, helical grooves (which are to provide the notches 4) are formed using a lathe provided with rolls having knurling ridges. Thereafter, helical grooves 2 are cut using a lathe provided with cutting tools which act like ploughs on the copper. For bending the peaks 5, there is a die (7), Fig. 4 (not shown). Specified dimensions (before any bending of the peaks 5) are: spacing between the adjacent grooves 2 of not more than 1 mm.; depth of each groove 2 (as measured from the highest point of each ridge 3) of not more than 2 mm.; and spacing between adjacent notches 4 of not more than 1 mm. The side edge surfaces and the bottom edge of each notch are all inclined with respect to the surface of the heat-transfer wall. The notches formed in the adjacent ridges are staggered from one another lengthwise of the ridges.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP562675A JPS5181072A (en) | 1975-01-13 | 1975-01-13 | GYOSHUKUDENNETSUHEKI OYOBI SONOSEIZOHOHO |
JP11447975A JPS5238667A (en) | 1975-09-22 | 1975-09-22 | Condensing heat-transmission wall and it's manufacturing method |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1523942A true GB1523942A (en) | 1978-09-06 |
Family
ID=26339590
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB101276A Expired GB1523942A (en) | 1975-01-13 | 1976-01-12 | Heat-transfer wall for condensation and method of manufacturing the same |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2600821C3 (en) |
GB (1) | GB1523942A (en) |
NL (1) | NL162316C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4706355A (en) * | 1984-12-11 | 1987-11-17 | Q-Dot Corporation | Method of making an internally grooved and expanded tubular heat exchanger apparatus |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3048959C2 (en) * | 1980-12-24 | 1985-08-29 | Wieland-Werke Ag, 7900 Ulm | Method and device for producing a finned tube for heat exchangers or the like. |
DE10122329B4 (en) * | 2001-05-08 | 2004-06-03 | Tinox Gmbh | Heat exchanger device with a surface-coated wall that separates medium 1 from medium 2 |
-
1976
- 1976-01-12 DE DE19762600821 patent/DE2600821C3/en not_active Expired
- 1976-01-12 NL NL7600256A patent/NL162316C/en not_active IP Right Cessation
- 1976-01-12 GB GB101276A patent/GB1523942A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4706355A (en) * | 1984-12-11 | 1987-11-17 | Q-Dot Corporation | Method of making an internally grooved and expanded tubular heat exchanger apparatus |
Also Published As
Publication number | Publication date |
---|---|
DE2600821A1 (en) | 1976-07-15 |
DE2600821C3 (en) | 1980-06-19 |
NL162316B (en) | 1979-12-17 |
DE2600821B2 (en) | 1979-10-11 |
NL162316C (en) | 1980-05-16 |
NL7600256A (en) | 1976-07-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19960111 |