Falling-Film Exchangers

These falling-film exchangers are used in various services as described in the following paragraphs. 

The liquid runs in a film-like manner by gravity down the inner walls of the vertical tubes in a falling film exchanger. The tubes do not run full, and, therefore, the film coefficient is greater than for the same liquid rate in a full tube... 

The advantage of high coefficient in falling-film exchangers is partially offset by the difficulties involved in distribution of the film, maintaining complete wettability of the tube, and pumping costs required to lift the liquid to the top of the exchanger. 

Falling-Film Exchangers Falling-film shell-and-tube heat... 

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