Heat and mass transfer element assembly

F - Mech Eng,Light,Heat,Weapons – 28 – D

Patent

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Details

F28D 19/04 (2006.01)

Patent

CA 2361376

A heat transfer assembly (40) for a rotary regenerative air preheater (10) has heat transfer plates (42) which include means (46) for spacing the plates (42) apart to form flow passages (44) and a plurality of rows of V-shaped ribs (48, 50) extending across the flow passages. Alternate rows of V-shaped ribs (48, 50) on each plate (42) protrude outwardly from opposite surfaces of the plate (42). Several arrangements for aligning the ribs (48, 50) on one plate (42) with the ribs (48, 50) on the adjacent plate (42) are described as are alternate orientations of the adjacent rows of ribs (48, 50) on each plate (42). The relationship of the height (h) of the ribs (48, 50) to the plate (42) spacing is defined as is the relationship of the rib spacing to the rib height (h) and the plate spacing (H) to the length (2W) of the V-shaped rib sections.

L'invention concerne un ensemble de transfert thermique (40) pour un préchauffeur d'air régénératif rotatif (10). Cet ensemble comporte des plaques (42) de transfert thermique qui comprennent des moyens (46) pour espacer les plaques (42) afin de former des passages d'écoulement (44) et plusieurs rangées de nervures en forme de V (48, 50) qui s'étendent dans ces passages. D'autres rangées de nervures en forme de V (48, 50) formées sur chaque plaque débordent vers l'extérieur à partir des surfaces opposées de la plaque (42). L'invention décrit plusieurs systèmes prévus pour aligner les nervures (48, 50) situées sur une plaque (42) avec les nervures (48, 50) situées sur la plaque adjacente (42) . L'invention décrit également d'autres orientations des rangées de nervures (48, 50) adjacentes sur chaque plaque (42). La relation de la hauteur (h) des nervures (48, 50) par rapport à l'espacement des plaques (42) est définie comme la relation de l'espacement des nervures par rapport à la hauteur des nervures (h) et l'espacement des plaques (H) par rapport à la longueur (2W) des sections des nervures en forme de V.

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