Two-stage evaporator unit

Details Two-stage evaporator unit Two-stage evaporator unit

1995-07-28

1998-10-20

Leo, Leonard R.

Heat exchange

Flow passages for two confined fluids

Interdigitated plural first and plural second fluid passages

165147, 165110, F28F 302, F28F 1308

Patent

active

058232524

ABSTRACT:
A two-stage evaporator unit converts a liquid reactant mass flow adjustable as a function of a load presetting into a gaseous reactant mass flow. The liquid reactant mass flow is at least partially evaporated in the first stage by a heat-exchange medium, and, if appropriate is completely evaporated and subsequently superheated in the second stage. The evaporator unit is formed by the alternating stacking one on the other of foils having heat-exchange channels and by foils having reaction channels that, in each case, have at least one first and one second stage integrated in one foil. The first stage is configured as a channel with a minimized cross-sectional area which is directly connected to the inflow conduit. The first stage is operated at high coefficients of heat transmission. The total cross-section of the reaction channels in the second stage increases in the flow direction.

REFERENCES:
patent: 3490523 (1970-01-01), Esmond
patent: 4347896 (1982-09-01), Rosman et al.
patent: 4665975 (1987-05-01), Johnston
patent: 4762171 (1988-08-01), Hallstrom et al.
patent: 4953634 (1990-09-01), Nelson et al.
patent: 5249624 (1993-10-01), Pow et al.
patent: 5316870 (1994-05-01), Ohga

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