Patent ID: 8298493
Filing Date: 2012-10-30
Classification: B01F,B01J,F28D,F28F

Abstract:
1. Heat exchange apparatus comprising a heat exchange wall through which heat exchange takes place from one wall surface to an opposite wall surface; a heat exchange structure disposed at the one wall surface and providing a flow passage for the flow therein in a flow direction of heat exchange fluid in heat exchange contact with the one wall surface; the flow passage comprising a succession of flow passage chamber portions, each of which is connected to any preceding and successive flow passage chamber portion by a respective flow passage throttle forming portion, both the chamber and the throttle forming portions having the flow passage one wall as a wall thereof, the throttle forming portions being of smaller flow cross section transverse to the flow direction than that of the connected flow passage chamber portions; whereby heat exchange fluid passing in the flow passage has a higher velocity during its passage through the throttle forming portions than in the passage chamber portions; the apparatus also comprising means for moving the heat exchange fluid through the flow passage at a flow rate such that its velocity, at least in the throttle forming portions, is high enough to reduce the thickness of the heat exchange fluid boundary layer in the throttle portions, and thereby facilitate heat exchange from the heat exchange fluid to the one wall surface.