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1. WO1998014742 - AIR PREHEATER HEAT TRANSFER SURFACE

Publication Number WO/1998/014742
Publication Date 09.04.1998
International Application No. PCT/US1997/018123
International Filing Date 30.09.1997
Chapter 2 Demand Filed 20.04.1998
IPC
F28D 19/04 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
28HEAT EXCHANGE IN GENERAL
DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT; HEAT STORAGE PLANTS OR APPARATUS IN GENERAL
19Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
04using rigid bodies, e.g. mounted on a movable carrier
CPC
F28D 19/044
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
28HEAT EXCHANGE IN GENERAL
DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
19Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
04using rigid bodies, e.g. mounted on a movable carrier
041with axial flow through the intermediate heat-transfer medium
042Rotors; Assemblies of heat absorbing masses
044shaped in sector form, e.g. with baskets
Applicants
  • ABB AIR PREHEATER, INC. [US]/[US]
Inventors
  • HARDER, William, Francis
  • RHODES, Robin, Barry
Agents
  • FOURNIER, Arthur, E., Jr.
Priority Data
08/725,96404.10.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) AIR PREHEATER HEAT TRANSFER SURFACE
(FR) SURFACE DE TRANSFERT DE CHALEUR D'UN RECHAUFFEUR D'AIR
Abstract
(EN)
An air preheater (10) has heat transfer elements (40) with a first series of corrugated elements (50) having longitudinally oriented, mutually parallel corrugations (51) formed generally continuously across the lateral direction. Positioned on either side of each of the corrugated elements (50) of the first series are a series of notched plates (52) each having mutually parallel spaced apart notches. Each notch (54) is formed by parallel double ridges (56) projecting transversely from opposite sides and the element (50) has flat sections (58) between the notches (54). The notches (54) are oriented obliquely in mutually opposite directions relative to the corrugations (51) of the adjacent elements (50) whereby the notched elements (52) are in contact with the corrugated elements (50) solely at the points of intersection of the notches (54) and corrugations (51). This produces an increased number of boundary layer breaks and improves heat transfer as well as providing straight line passages through the elements (50).
(FR)
L'invention porte sur un réchauffeur (10) d'air, qui a des éléments (40) de transfert de chaleur munis d'une première série de plaques ondulées (50) ayant des ondulations (51) qui sont parallèles les unes aux autres et orientées longitudinalement et qui sont généralement formées de manière ininterrompue sur toute la direction latérale. Une série de plaques (52) crantées est disposée sur chaque côté de chacune des plaques ondulées (50) de la première série, chaque plaque crantée présentant des crans qui sont espacés les uns par rapport aux autres et parallèles les uns aux autres. Chaque cran (54) est formé par des doubles crêtes (56) parallèles, qui font saillie transversalement à partir de côtés opposés. L'élément (50) a des sections (58) plates entre les crans (54). Les crans (54) sont orientés en oblique dans des directions réciproquement opposées par rapport aux ondulations (51) des éléments (50) adjacents. Les éléments (52) crantés sont au contact des éléments (50) adjacents uniquement aux points d'intersection des crans (54) et des ondulations (51). Cet ensemble produit un nombre plus grand de cassures de couches limites, améliore le transfert de chaleur et fournit des passages en ligne droite à travers les éléments (50).
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