HEAT TRANSFER TUBE, BOILER, AND STEAM TURBINE FACILITY

Title:

HEAT TRANSFER TUBE, BOILER, AND STEAM TURBINE FACILITY

Document Type and Number:

WIPO Patent Application WO/2015/099009

Kind Code:

A1

Abstract:

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.

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Inventors:

NAKAHARAI HIROYUKI (JP)
KANEMAKI YUICHI (JP)
DOMOTO KAZUHIRO (JP)
YAMASAKI YOSHINORI (JP)

Application Number:

PCT/JP2014/084238

Publication Date:

July 02, 2015

Filing Date:

December 25, 2014

Export Citation:

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Assignee:

MITSUBISHI HITACHI POWER SYS (JP)

International Classes:

F22B37/12; F22B1/18; F28F1/40

Foreign References:

JPH06137501A	1994-05-17
JPH0842805A	1996-02-16
JPH05118507A	1993-05-14
JPS5623603A	1981-03-06
JPS60139107U	1985-09-14
JPS60139106U	1985-09-14
JPH05118507A	1993-05-14
JPH06137501A	1994-05-17

Other References: