Heat exchanger having improved tube layout

Details Heat exchanger having improved tube layout Heat exchanger having improved tube layout

F - Mech Eng,Light,Heat,Weapons

28

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257/18

F28D 7/00 (2006.01) F28D 7/16 (2006.01) F28F 9/22 (2006.01)

Patent

CA 1122202

ABSTRACT OF THE DISCLOSURE A heat exchanger having a disc and doughnut baffle configuration, in which the tubes are laid out in a set of concentric rings. Each ring of a set contains the same num- ber of tubes as each other ring of the set, and the tubes in each ring are spaced uniformly apart. Each tube in each ring is located circumferentially midway between the two adjacent tubes of each neighbouring ring and is separated from each of the two adjacent tubes in each adjacent ring by a ligament distance h. The distance h is held constant for all tubes in the set, by varying the radial spacing between rings, and the distance between any two adjacent tubes in any ring of the set is made greater than or equal to 2h. The ligament gaps h which are constant therefore determine the minimum flow area between adjacent rings, and therefore the mass flow velocity through the tube bundle is constant.

340568

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