Boiling process and a heat exchanger for use in the process

Details Boiling process and a heat exchanger for use in the process Boiling process and a heat exchanger for use in the process

1991-03-01

1992-06-16

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 36, 62 42, 165166, F25J 302

Patent

active

051221748

ABSTRACT:
The present invention relates to a boiling process in a downflow heat exchanger and the heat exchanger itself with liquid distribution enhancing features which improve performance and allow safe and efficient operation. Performance enhancing features include a partially flooded hardway distribution region with a liquid volume fraction greater than about 0.25 and preferably greater than 0.5, adjusting the heat transfer surface area to maintain a liquid film Reynolds number above 20 and, preferably, above 50 yet less than 1000, preferably less than 300, for at least 75% of the reboiler surface, and, optionally, intermediate feeding of liquid at various intervals along the length of the heat exchanger to obtain more uniform values of liquid film Reynolds numbers and intermediate redistribution.

REFERENCES:
patent: Re33026 (1989-08-01), Petit et al.
patent: 3282334 (1966-11-01), Stahlheber
patent: 3568462 (1971-03-01), Hoffman et al.
patent: 3992168 (1976-11-01), Toyama et al.
patent: 4574007 (1986-03-01), Yearout et al.
patent: 4599097 (1986-07-01), Petit et al.
patent: 4606745 (1986-08-01), Fujita
patent: 4646822 (1987-05-01), Voggenreiter et al.
patent: 4699209 (1987-10-01), Thorogood
patent: 4715431 (1987-12-01), Schwartz
patent: 4715433 (1987-12-01), Schwartz

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