Patent ID: 6167713
Filing Date: 2001-01-02
Classification: F25B,F28D,Y10S

Abstract:
A falling film evaporator for use in a refrigeration chiller system comprising: a shell; a tube bundle disposed in said shell; and a refrigerant distributor disposed in said shell and overlying said tube bundle so that liquid refrigerant expressed out of said distributor is deposited thereonto, said distributor including an inlet through which a two-phase mixture of refrigerant is received and at least a first stage distributor portion and a second stage distributor portion, said first stage distributor portion receiving said two-phase mixture of refrigerant from said inlet and internally flowing said mixture through a flow path in one of a first and a second directions with respect to said tube bundle, said second stage distributor portion receiving said two-phase mixture of refrigerant from said first stage distributor portion and internally flowing said mixture through a flow path in the other of said two directions with respect to said bundle, at least said first stage distributor portion configured to maintain the velocity of said two-stage refrigerant mixture essentially constant as it flows therethrough.