GB1523942A - Heat-transfer wall for condensation and method of manufacturing the same - Google Patents

Heat-transfer wall for condensation and method of manufacturing the same

Info

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
Application number
GB101276A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Cable Ltd
Hitachi Ltd
Original Assignee
Hitachi Cable Ltd
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP562675A external-priority patent/JPS5181072A/en
Priority claimed from JP11447975A external-priority patent/JPS5238667A/en
Application filed by Hitachi Cable Ltd, Hitachi Ltd filed Critical Hitachi Cable Ltd
Publication of GB1523942A publication Critical patent/GB1523942A/en
Expired legal-status Critical Current

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.
GB101276A 1975-01-13 1976-01-12 Heat-transfer wall for condensation and method of manufacturing the same Expired GB1523942A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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
DE2600821C3 (en) 1980-06-19
NL162316C (en) 1980-05-16
NL7600256A (en) 1976-07-15
DE2600821A1 (en) 1976-07-15
NL162316B (en) 1979-12-17
DE2600821B2 (en) 1979-10-11

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19960111