Corrugated fin type head exchanger

Heat exchange – Radiator core type – Deformed sheet forms passages between side-by-side tube means

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Details

165153, 165DIG487, 165DIG505, F28D 104

Patent

active

055644970

ABSTRACT:
According to the present invention, in a corrugated fin type heat exchanger including a core portion having a plurality of flat tubes disposed in parallel relation with regard to a flow direction of air and at least one corrugated fin disposed between each pair of the flat tubes, a height of a flow space within the flat tube is in a range of 0.6-1.2 mm, a height of the corrugated fin is in a range of 3-6 mm, and a ratio (St/W.times.D) of the cross-sectional area (W.times.D) expressed by an overall width dimension (W) and a thickness dimension (D) of the core portion to a total cross-sectional flow passage area (St) of the plurality of flat tubes is set to a range of 0.07-0.24 according to the height of the flow space of the flat tube and the height of the corrugated fin. In this way, it is possible to reduce the Reynold's number of the flow passages within the flat tubes to maintain a constant region irrespective of the variation in the hot water flow quantity, thereby reducing the variation in the water side heat transfer rate.

REFERENCES:
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patent: 4693307 (1987-09-01), Scarselletta
patent: 4825941 (1989-05-01), Hoshino et al.
patent: 4998580 (1991-03-01), Guntly et al.
patent: 5076354 (1991-12-01), Nishishita
patent: 5186249 (1993-02-01), Bhatti et al.
patent: 5311935 (1994-05-01), Yamamoto et al.

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