HEAT TRANSFER TUBE, BOILER AND STEAM TURBINE DEVICE

A furnace wall tube (35) provided in a boiler and the interior of which is at supercritical pressure, and through which a heat medium circulates, said furnace wall tube having: spiral groove parts (36) formed in the inner peripheral surface and running in the axial direction of the tube; and rib par...

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Bibliographic Details
Main Authors YAMASAKI, YOSHINORI, NAKAHARAI, HIROYUKI, KANEMAKI, YUICHI, DOMOTO, KAZUHIRO
Format Patent
LanguageEnglish
French
Published 02.07.2015
Subjects
BLASTING
DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION
HEAT EXCHANGE IN GENERAL
HEATING
LIGHTING
MECHANICAL ENGINEERING
METHODS OF STEAM GENERATION
STEAM BOILERS
STEAM GENERATION
WEAPONS
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Summary:A furnace wall tube (35) provided in a boiler and the interior of which is at supercritical pressure, and through which a heat medium circulates, said furnace wall tube having: spiral groove parts (36) formed in the inner peripheral surface and running in the axial direction of the tube; and rib parts (37) formed by means of the spiral grooves (36) so as to protrude radially inward. In a cross section along the axial direction of the tube, when the width [mm] of the groove parts (36) in tube axial direction is Wg, the height [mm] of the rib parts (37) in the radial direction is Hr, and the outer diameter [mm] of the tube is D, then the width (Wg) [mm] of the groove parts (36), the height (Hr) [mm] of the rib parts (37), and the tube diameter (D) [mm] satisfy the relationship Wg/(Hr·D) > 0.40.
Bibliography:Application Number: CA20142935039