Microchannel crossflow fluid heat exchanger and method for its f

Heat exchange – Flow passages for two confined fluids – Interdigitated plural first and plural second fluid passages

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165166, F28F 300, F28F 308

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045166323

ABSTRACT:
A microchannel crossflow fluid heat exchanger and a method for its fabrication are disclosed. The heat exchanger is formed from a stack of thin metal sheets which are bonded together. The stack consists of alternating slotted and unslotted sheets. Each of the slotted sheets includes multiple parallel slots which form fluid flow channels when sandwiched between the unslotted sheets. Successive slotted sheets in the stack are rotated ninety degrees with respect to one another so as to form two sets of orthogonally extending fluid flow channels which are arranged in a crossflow configuration. The heat exchanger has a high surface to volume ratio, a small dead volume, a high heat transfer coefficient, and is suitable for use with fluids under high pressures. The heat exchanger has particular application in a Stirling engine that utilizes a liquid as the working substance.

REFERENCES:
patent: 1662870 (1928-03-01), Stancliffe
patent: 3228465 (1966-01-01), Vadot
patent: 3231017 (1966-01-01), Henderson
patent: 3823457 (1974-07-01), Staas et al.
patent: 4434845 (1984-03-01), Steeb

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