Patent ID: 7690833
Filing Date: 2010-04-06
Classification: B01F,F28D,F28F

Abstract:
1. A heat exchanger comprising: an elongate hollow body having a peripheral wall surrounding a hollow interior providing a fluid flow passage; a fluid flow inlet for admission of a fluid into one end of the fluid flow passage; a fluid flow outlet for outlet of the fluid from the other end of the fluid flow passage; a series of openings formed in the peripheral wall of the hollow body; a sleeve closely fitted about and extending along the peripheral wall of the hollow body so as to cover all of said openings and to close the fluid flow passage against flow of fluid to and from the fluid flow passage through the openings; a drive for imparting relative motion between the peripheral wall of the elongate hollow body and the closely fitted sleeve such that there is relative movement between the openings in the peripheral wall of the hollow body and those parts of the sleeve covering the openings to create viscous drag on the fluid flowing within the fluid flow passage generating transverse peripheral flows of fluid within that passage simultaneously in the vicinity of all of the openings; and a temperature control device for heating or cooling at least one of the sleeve and the elongate hollow body so that the fluid is subjected to heat exchange.