Falling film evaporator with refrigerant distribution system

F - Mech Eng,Light,Heat,Weapons – 25 – B

Patent

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Details

F25B 39/02 (2006.01) B01D 1/04 (2006.01) B01D 3/00 (2006.01) B05B 1/20 (2006.01) F28D 3/04 (2006.01) F25B 9/00 (2006.01)

Patent

CA 2219676

Compression refrigeration apparatus (1) for removing heat from a heat load using a falling film evaporator (8), operated with an azeotropic refrigerant and utilizing a spray tree distribution system (37) that distributes a refrigerant film on a heat exchange surface by spraying liquid refrigerant onto a surface (65) and allowing the refrigerant to drip onto the primary heat exchange surface (56). The apparatus allows for efficient recovery of lubricant deposited in the evaporator (8) without redistributing the lubricant within the evaporator (8). In an alternative embodiment, liquid refrigerant is sprayed onto a mesh screen (80) where it drips onto the primary heat exchange surface (56).

Appareil frigorifique à compression (1) permettant d'extraire de la chaleur d'une charge thermique à l'aide d'un évaporateur à ruissellement (8), fonctionnant au moyen d'un fluide frigorigène azéotrope et faisant appel à un système de distribution par pulvérisation en arborescence (37), qui distribue un film de fluide frigorigène sur une surface d'échange de chaleur par pulvérisation du fluide frigorigène sur une surface (65), après quoi on laisse ce dernier s'égoutter sur la surface d'échange de chaleur principale (56). Cet appareil permet une récupération efficace du lubrifiant déposé dans l'évaporateur (8) sans redistribution du lubrifiant dans ledit évaporateur (8). Dans une variante, le fluide frigorigène est pulvérisé sur un écran à mailles (80), à partir duquel il s'égoutte sur la surface d'échange de chaleur principale.

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