Heat transfer element assembly

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

Patent

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F28D 19/04 (2006.01)

Patent

CA 2352284

The thermal performance of the heat transfer element assemblies (40) for rotary regenerative air preheaters (10) is optimized to provide a desired level of heat transfer and pressure drop with a reduced volume and weight. The heat transfer plates (44, 46, 48) in the assemblies (50) have notches (50) for maintaining plate spacing and oblique undulations (58) between the notches (50). The undulations (58) on adjacent plates (44, 46, 48) extend at opposite oblique angles. The ratio of the openings of the undulations (58) to the openings of the notches (50) is greater than two inches and the angle of the undulations (58) with respect to the notches (50) is greater than 20° and less than 40° .

Cette invention concerne des systèmes d'éléments de transfert de chaleur (40) qui sont destinés à des unités de préchauffage d'air rotatives et régénératrices (10), et dont les performances thermiques sont optimisées de manière à atteindre un niveau voulu de transfert de chaleur et de chute de pression tout en en réduisant leur volume et leur poids. Les plaques de transfert de chaleur (44, 46, 48) que comportent ces systèmes (40) possèdent des encoches (50) qui servent à maintenir l'espacement des plaques, ainsi que des ondulations obliques (58) prévues entre lesdites encoches (50). Les ondulations (58) situées sur des plaques adjacentes (44, 46, 48) sont orientées selon des angles obliques opposés. Le rapport entre les ouvertures des ondulations (58) et les ouvertures des encoches (50) est supérieur à deux pouces, tandis que l'angle des ondulations (58) par rapport aux encoches (50) est supérieur à 20 DEG mais inférieur à 40 DEG .

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