GB1238699A - - Google Patents

Info

Publication number
GB1238699A
GB1238699A GB1238699DA GB1238699A GB 1238699 A GB1238699 A GB 1238699A GB 1238699D A GB1238699D A GB 1238699DA GB 1238699 A GB1238699 A GB 1238699A
Authority
GB
United Kingdom
Prior art keywords
projections
internal
radially aligned
heat exchange
tube
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
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 filed Critical
Publication of GB1238699A publication Critical patent/GB1238699A/en
Expired 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
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F28F1/422—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element with outside means integral with the tubular element and inside means integral with the tubular element
    • 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
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and 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)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

1,238,699. Tubular heat-exchange elements. ROLLS-ROYCE Ltd. 21 Dec., 1968, No. 60886/68. Heading F4S. A circular heat exchange tube 10 is provided with internal and external integral, axially extending projections 18, 14 respectively. The internal and external surfaces 16, 12 of the tube are sinusoidal in cross-section and dimensioned such that their surface areas are substantially double that of plain circular tubes having diameters DINT and D EXT respectively. As shown the projections 14 are radially aligned with the troughs between adjacent projections 18. Alternatively the projections 14 may be radially aligned with the projections 18 (Fig. 2). The heat exchange tube 10 can be produced, by extrusion.
GB1238699D 1968-12-21 1968-12-21 Expired GB1238699A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6088668 1968-12-21

Publications (1)

Publication Number Publication Date
GB1238699A true GB1238699A (en) 1971-07-07

Family

ID=10486256

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1238699D Expired GB1238699A (en) 1968-12-21 1968-12-21

Country Status (1)

Country Link
GB (1) GB1238699A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930627A (en) * 1973-10-03 1976-01-06 Summa Corporation Radiation shielding and gas diffusion apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930627A (en) * 1973-10-03 1976-01-06 Summa Corporation Radiation shielding and gas diffusion apparatus

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees