JPS5758094A - Heat transfer pipe - Google Patents

Heat transfer pipe

Info

Publication number
JPS5758094A
JPS5758094A JP12404781A JP12404781A JPS5758094A JP S5758094 A JPS5758094 A JP S5758094A JP 12404781 A JP12404781 A JP 12404781A JP 12404781 A JP12404781 A JP 12404781A JP S5758094 A JPS5758094 A JP S5758094A
Authority
JP
Japan
Prior art keywords
pipe
heat transfer
groove
liquid
smooth
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.)
Pending
Application number
JP12404781A
Other languages
Japanese (ja)
Inventor
Kunio Fujie
Masaaki Ito
Tamio Innami
Hideyuki Kimura
Hisashi Nakayama
Takehiko Yanagida
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 Ltd
Original Assignee
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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12404781A priority Critical patent/JPS5758094A/en
Publication of JPS5758094A publication Critical patent/JPS5758094A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

PURPOSE:To improve the heat transfer efficiency of the captioned heat transfer pipe and to reduce a pressure loss by a method wherein a V-shaped spiral groove is formed on the inner surface of a smooth pipe to thereby produce the heat transfer pipe with the depth of the groove being 0.02-0.2mm. and the pitch thereof being 0.1-0.5mm. CONSTITUTION:In an arrangement in which a fluid varying in phase is flowed within the pipe 1 in a double phase condition by means of a pump (not shown), the V-shaped spiral groove 2 is formed on the smooth inner wall surface of the pipe 1. In this case, the depth (h) of the groove 2 is made to be in the order of 0.02-0.2mm. and pitch (p) thereof is made to be in order of 0.1-0.5mm.. Consequently, when the liquid is boiling, it becomes itself a film over the entire grooved inner wall surface of the pipe while it is subjected to a rotary force along the surface so that the thin groove 2 acts as a boiling nucleus to thereby increase the heat transfer efficiency of the pipe. Further, as the groove 2 is made smooth by being covered with the liquid, the loss of pressure of the liquid is reduced.
JP12404781A 1981-08-10 1981-08-10 Heat transfer pipe Pending JPS5758094A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12404781A JPS5758094A (en) 1981-08-10 1981-08-10 Heat transfer pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12404781A JPS5758094A (en) 1981-08-10 1981-08-10 Heat transfer pipe

Publications (1)

Publication Number Publication Date
JPS5758094A true JPS5758094A (en) 1982-04-07

Family

ID=14875672

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12404781A Pending JPS5758094A (en) 1981-08-10 1981-08-10 Heat transfer pipe

Country Status (1)

Country Link
JP (1) JPS5758094A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60142195A (en) * 1983-12-28 1985-07-27 Hitachi Cable Ltd Internally grooved heat transfer tube
US4660630A (en) * 1985-06-12 1987-04-28 Wolverine Tube, Inc. Heat transfer tube having internal ridges, and method of making same
US4938282A (en) * 1988-09-15 1990-07-03 Zohler Steven R High performance heat transfer tube for heat exchanger
FR2837270A1 (en) 2002-03-12 2003-09-19 Trefimetaux GROOVED TUBES FOR REVERSIBLE USE FOR HEAT EXCHANGERS
FR2855601A1 (en) 2003-05-26 2004-12-03 Trefimetaux GROOVED TUBES FOR THERMAL EXCHANGERS WITH TYPICALLY AQUEOUS MONOPHASIC FLUID

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426044A (en) * 1941-09-19 1947-08-19 Servel Inc Heat transfer device with liquid lifting capillary surface

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426044A (en) * 1941-09-19 1947-08-19 Servel Inc Heat transfer device with liquid lifting capillary surface

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60142195A (en) * 1983-12-28 1985-07-27 Hitachi Cable Ltd Internally grooved heat transfer tube
US4658892A (en) * 1983-12-28 1987-04-21 Hitachi Cable, Ltd. Heat-transfer tubes with grooved inner surface
US4660630A (en) * 1985-06-12 1987-04-28 Wolverine Tube, Inc. Heat transfer tube having internal ridges, and method of making same
US4938282A (en) * 1988-09-15 1990-07-03 Zohler Steven R High performance heat transfer tube for heat exchanger
FR2837270A1 (en) 2002-03-12 2003-09-19 Trefimetaux GROOVED TUBES FOR REVERSIBLE USE FOR HEAT EXCHANGERS
FR2855601A1 (en) 2003-05-26 2004-12-03 Trefimetaux GROOVED TUBES FOR THERMAL EXCHANGERS WITH TYPICALLY AQUEOUS MONOPHASIC FLUID
US7267166B2 (en) * 2003-05-26 2007-09-11 Trefimetaux S.A. Grooved tubes for heat exchangers that use a single-phase fluid

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