US3027314A - Heat transfer surfaces - Google Patents

Heat transfer surfaces Download PDF

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Publication number
US3027314A
US3027314A US698635A US69863557A US3027314A US 3027314 A US3027314 A US 3027314A US 698635 A US698635 A US 698635A US 69863557 A US69863557 A US 69863557A US 3027314 A US3027314 A US 3027314A
Authority
US
United States
Prior art keywords
fins
baffles
heat exchange
transfer surfaces
heat transfer
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 - Lifetime
Application number
US698635A
Other languages
English (en)
Inventor
Roger D Vaughan
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.)
CA Parsons and Co Ltd
Original Assignee
CA Parsons and Co 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 CA Parsons and Co Ltd filed Critical CA Parsons and Co Ltd
Application granted granted Critical
Publication of US3027314A publication Critical patent/US3027314A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • 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
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
    • G21C3/02—Fuel elements
    • G21C3/04—Constructional details
    • G21C3/06—Casings; Jackets
    • G21C3/08—Casings; Jackets provided with external means to promote heat-transfer, e.g. fins, baffles
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
    • G21C3/02—Fuel elements
    • G21C3/04—Constructional details
    • G21C3/06—Casings; Jackets
    • G21C3/12—Means forming part of the element for locating it within the reactor core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Definitions

  • This invention relates to a tubular heat exchange element comprising a tube having helical fins disposed on a peripheral surface, flow channels formed between the fins being interrupted by baflles extending longitudinally of the element.
  • a tubular heat exchange element suitable for use as a fuel container for nuclear fuel in a nuclear reactor the form of element described consisting of a container for nuclear fuel the outside surface of which had helically disposed fins, the fiow channels formed between the fins being interrupted at certain places by longitudinal baffies, the baffies being equally spaced over the periphery of the element.
  • baffles it becomes necessary in practice to fix the baffles in position and yet allow for a certain degree of ditfrential expansion between bafile and container.
  • flow path for the fluids entering the flow channels between the fins should be substantially uninterrupted by the fixing means for the bafiies.
  • the object of the present invention is to provide fixing means for the baffles which substantially meet these requirements.
  • the tube has helical fins spaced around the peripheral surface with the fiow channels formed between the fins interrupted by bafiles extending longitudinally of the element, and the baffles are loosely inserted in longitudinal slots formed in the fins and held in position by rings detachably secured to the tips of the fins at either end of the element and engage with a clearance slots formed in the ends of the bafiles.
  • the rings are screwed onto the fins.
  • FIGURE 1 shows in section an end portion of two fuel elements for a nuclear reactor
  • FIGURE 2 shows an end view of one such element.
  • each element consists of a container 1 having spaced fins 2 helically disposed about its longitudinal axis XX. Interrupting the spaces between the fins are longitudinal baffles 3 which loosely fit into slots formed in the fins. In the form illustrated four such baffies are associated with each element the baffles being equally spaced apart over the circumference of the element.
  • Nuclear fuel 4 is housed in the container 1 and is kept in position in the container by end caps 5 which are welded to the ends of the container and are separated from the fuel by heat insulating discs 6.
  • end caps 5 are screwed in turn to end fittings 7 which are conical in form so as 3,@Z7,3l4 Patented Mar. 27, 1962 to assist accurate location of the elements when they are being stacked one upon the other in a channel in the reactor.
  • the fixing means for the baffles 3 comprise a ring 8 which is screwed to the tips of the fins and fits with a clearance into a slot 9 in each bafile. This clearance allows for expansion of the baflie relative to the container in an axial direction.
  • the ring is preferably made of material having low neutron absorption properties such as a magnesium alloy.
  • a further advantage of the invention is that the ring protects the ends of the fins against damage during use particularly during the charging or discharging operation for the elements.
  • rings may be fixed in position after the end fixings are attached, so that they are completely independent of the actual form of seal and end-fixing employed.
  • a tubular heat exchange element comprising a tube having helical fins disposed on a peripheral surface, flow channels formed between the fins being interrupted by baffies spaced around the periphery and extending longitudinally of the element, in which element the bafiies are loosely inserted in longitudinal slots formed in the fins and are held in position by rings detachably secured to the tips of the fins at each end of the element and engaging with a clearance slots formed in the ends of the baffies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Plasma & Fusion (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
US698635A 1956-11-28 1957-11-25 Heat transfer surfaces Expired - Lifetime US3027314A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB36399/56A GB847219A (en) 1956-11-28 1956-11-28 Improvements in and relating to heat transfer surfaces

Publications (1)

Publication Number Publication Date
US3027314A true US3027314A (en) 1962-03-27

Family

ID=10387783

Family Applications (1)

Application Number Title Priority Date Filing Date
US698635A Expired - Lifetime US3027314A (en) 1956-11-28 1957-11-25 Heat transfer surfaces

Country Status (5)

Country Link
US (1) US3027314A (enrdf_load_stackoverflow)
DE (1) DE1060414B (enrdf_load_stackoverflow)
FR (1) FR1186785A (enrdf_load_stackoverflow)
GB (1) GB847219A (enrdf_load_stackoverflow)
NL (2) NL107078C (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3189525A (en) * 1960-04-19 1965-06-15 Atomic Energy Authority Uk Nuclear reactor fuel elements
US3243352A (en) * 1962-10-26 1966-03-29 Commissariat Energie Atomique Fuel element for a nuclear reactor
US20160070319A1 (en) * 2014-09-08 2016-03-10 Ashwin Bharadwaj Heat sink

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB923826A (en) * 1960-06-27 1963-04-18 Atomic Energy Authority Uk Improvements in or relating to fuel elements for nuclear reactors

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1881610A (en) * 1930-07-11 1932-10-11 Mccord Radiator & Mfg Co Tubing
US1993539A (en) * 1933-04-03 1935-03-05 George R Anthony Apparatus for conditioning air
US2492932A (en) * 1943-08-04 1949-12-27 Arthur J Fausek Means for separating the constituents of gaseous mixtures
US2687747A (en) * 1951-05-22 1954-08-31 Bock Corp Flue conduit with internal heat transfer elements
US2841545A (en) * 1954-06-15 1958-07-01 Walter H Zinn Power reactor
US2863815A (en) * 1953-07-23 1958-12-09 Moore Richard Valentine Nuclear reactor
US2874940A (en) * 1951-05-16 1959-02-24 Svenska Rotor Maskiner Ab Heat exchanger
US2885335A (en) * 1954-05-11 1959-05-05 Moore Richard Valentine Nuclear reactor fuel element

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1881610A (en) * 1930-07-11 1932-10-11 Mccord Radiator & Mfg Co Tubing
US1993539A (en) * 1933-04-03 1935-03-05 George R Anthony Apparatus for conditioning air
US2492932A (en) * 1943-08-04 1949-12-27 Arthur J Fausek Means for separating the constituents of gaseous mixtures
US2874940A (en) * 1951-05-16 1959-02-24 Svenska Rotor Maskiner Ab Heat exchanger
US2687747A (en) * 1951-05-22 1954-08-31 Bock Corp Flue conduit with internal heat transfer elements
US2863815A (en) * 1953-07-23 1958-12-09 Moore Richard Valentine Nuclear reactor
US2885335A (en) * 1954-05-11 1959-05-05 Moore Richard Valentine Nuclear reactor fuel element
US2841545A (en) * 1954-06-15 1958-07-01 Walter H Zinn Power reactor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3189525A (en) * 1960-04-19 1965-06-15 Atomic Energy Authority Uk Nuclear reactor fuel elements
US3243352A (en) * 1962-10-26 1966-03-29 Commissariat Energie Atomique Fuel element for a nuclear reactor
US20160070319A1 (en) * 2014-09-08 2016-03-10 Ashwin Bharadwaj Heat sink
US10103081B2 (en) * 2014-09-08 2018-10-16 Ashwin Bharadwaj Heat sink

Also Published As

Publication number Publication date
NL222577A (enrdf_load_stackoverflow)
DE1060414B (de) 1959-07-02
GB847219A (en) 1960-09-07
FR1186785A (fr) 1959-09-01
NL107078C (enrdf_load_stackoverflow) 1964-01-15

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