Heat exchange – Flow passages for two confined fluids – Interdigitated plural first and plural second fluid passages
Patent
1985-07-10
1987-05-19
Davis, Jr., Albert W.
Heat exchange
Flow passages for two confined fluids
Interdigitated plural first and plural second fluid passages
165174, F28F 308, F28F 902
Patent
active
046659757
ABSTRACT:
A plate-type heat exchanger wherein a plurality of flat plates are stacked in face-to-face relationship and diffusion bonded together. The plates are formed within their respective thicknesses with channels forming heat-exchange zones through which fluid passes to exchange heat with fluid passing through channels in adjacent plates. Each of the channelled plates has an inlet port which communicates with one end of the heat-exchange zone, an outlet port which communicates with the other end of the heat-exchange zone and, located between the respective ports and the associated ends of the heat exchange zone, a smoothing zone and a distribution zone. The smoothing zone comprises transverse fluid-flow passages wherein a transverse-flow component is imparted to fluid flowing between the distribution zone and the heat-exchange zone, and the distribution-zone comprises a plurality of fluid-flow passages extending between the port and the smoothing zone. The distribution-zone passages have equal cross-sectional dimensions and a length and space relationship allowing substantially uniform flow of fluid at all points across the width of the heat exchange zone. Uniform flow of fluid is achieved by forming all distribution-zone passages to have the same length and be spaced apart by an equal amount at the smoothing zone, or by forming the distribution-zone passages with different lengths and varying the spacing between the passages at the smoothing zone wherein the spacing decreases with increasing length of the passages.
REFERENCES:
patent: 1992097 (1935-02-01), Seligman
patent: 3532161 (1970-10-01), Lockel
patent: 3807496 (1974-04-01), Stadmark
patent: 4182411 (1980-01-01), Sumitomo et al.
patent: 4347896 (1982-09-01), Rosman et al.
Cole Richard R.
Davis Jr. Albert W.
Klauber Stefan J.
University of Sydney
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