Patent ID: 6145588
Filing Date: 2000-11-14
Classification: F24F,F28D,Y10S

Abstract:
An air-to-air heat and moisture exchange comprising:(a) a plurality of membrane sheets which are suitable for operating in an air environment, and which preferentially allow water or water vapor to cross therethrough in response to a moisture gradient from a first side of each of said membrane sheets to a second side of each of said membrane sheets, said membrane sheets including a porous substrate and a hydrophilic polymeric material deposited upon said porous substrate and forming a layer thereon, said hydrophilic polymeric material formed in place by interfacial polymerization;(b) a support structure for holding each of said plurality of membrane sheets in generally parallel spaced relation to form a plurality of flow areas, one between each adjacent pair of said membrane sheets; and,(c) means for passing a first air stream and a second air stream through alternating flow areas so that said first air stream and said second air stream are on opposite sides of each of said membrane sheets to allow heat and moisture transfer therebetween.