GB890779A - Improvements in tubulous vapour generators and in vapour generating tubes - Google Patents

Improvements in tubulous vapour generators and in vapour generating tubes

Info

Publication number
GB890779A
GB890779A GB43907/60A GB4390760A GB890779A GB 890779 A GB890779 A GB 890779A GB 43907/60 A GB43907/60 A GB 43907/60A GB 4390760 A GB4390760 A GB 4390760A GB 890779 A GB890779 A GB 890779A
Authority
GB
United Kingdom
Prior art keywords
range
tube
rib
falls
ably
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
GB43907/60A
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.)
Babcock and Wilcox Co
Original Assignee
Babcock and Wilcox Co
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 Babcock and Wilcox Co filed Critical Babcock and Wilcox Co
Publication of GB890779A publication Critical patent/GB890779A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/101—Tubes having fins or ribs
    • F22B37/103—Internally ribbed tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D7/00—Auxiliary devices for promoting water circulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

890,779. Tubular elements for sub-critical boilers. BABCOCK & WILCOX CO. Dec. 21, 1960 [Dec. 28, 1959], No. 43907/60. Class 123(2) In order to assure nucleate boiling and delay breakdown to film boiling of the liquid flowing through the vapour generating tubes of a subcritical pressure boiler of the forced, or natural, circulation type each tube 10 is formed, internally, throughout its length, with a continuous helical groove 14 to define a helical rib 16 which provides fluid turbulance along the inner surface of the tube. The rib 14, having a helix slope angle of approximately 15 degrees, has inclined sides 16<SP>1</SP>. In a modification, Fig. 2, each tube is grooved to provide a pair of continuous ribs. The grooves and the ribs are proportioned so that where:- P=the distance between adjacent ribs measured longitudinally of the tube. H and W=the height and width respectively of a rib. L=the advance in one complete revolution of the helical path of a rib. D=the minor inside diameter of the tube. then- P falls within the range 10-25, and is preferably H between 12-20. W falls within the range 0À2-0À55, and is prefer- P ably between 0À3-0À4. L falls within the range 0À1-2À5, and is prefer- D ably between 0À1-1À5. H falls within the range 0À03-0À08, and is prefer- D ably between 0À04-0À065. The range of the valve S , where S =the length H parallel to the tube axis of the inclined side of a rib, advantageously is also within the range of 0-2À5 and is preferably between 0-1À5.
GB43907/60A 1959-12-28 1960-12-21 Improvements in tubulous vapour generators and in vapour generating tubes Expired GB890779A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US890779XA 1959-12-28 1959-12-28

Publications (1)

Publication Number Publication Date
GB890779A true GB890779A (en) 1962-03-07

Family

ID=22215557

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43907/60A Expired GB890779A (en) 1959-12-28 1960-12-21 Improvements in tubulous vapour generators and in vapour generating tubes

Country Status (1)

Country Link
GB (1) GB890779A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110715173A (en) * 2019-09-29 2020-01-21 西安交通大学 Quick precooling transmission pipeline structure of low-temperature propellant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110715173A (en) * 2019-09-29 2020-01-21 西安交通大学 Quick precooling transmission pipeline structure of low-temperature propellant

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