Evaporative Chiller Using Plate Type String-Screen-Fills as Heat Exchanger and Fabrication Thereof

Abstract

The present invention involves an evaporative chiller using a plate type string-screen-fill heat exchanger which is formed of a multiplicity of plate type string-screen-fills with string screens on their both sides. The hot water sprayed on the top perforated plate of the heat exchanger is imbibed into holes on the top plate by surface tension of strings suspending over the holes and then flows down on the surface of strings. During its flowing down on the surface of strings, the water is cooled through evaporation and convection mechanisms of water by contacting with air traveling transversely or slantly through the strings by means of a forced draft. The construction cost and electric consumption saving of the present invention are less than half cost of the current chiller and more than 30%, respectively. The fabrication method of the plate string-screen-fill heat exchanger is described in the present invention.

What is claimed is: 
     
         1 . An evaporative chiller using string-screen-fill pack, comprising:
 a multiplicity of string-screen-fills each having a pair of vertical-string-screens on both sides of said string-screen-fill, each of said vertical-string-screen having vertical strings separated sufficiently apart from each other, wherein said vertical strings passing through and over semi-circular holes on the frame of said string-screen-fill;   several of attachment tabs on said string-screen-fill frame, each of said attachment tabs locating on said string-screen-fill frame for joining said string-screen-fills, whereby said attachment tabs are joined by aligning said attachment tabs with and inserting into the counterpart tabs of said string-screen-fill to be joined by pressing.   
     
     
         2 . A string-screen-fill pack for use in evaporative chiller as recited in  claim 1 , wherein said string-screen-fill packs are employed in rectangular, square, pentagon, and hexagon cooling towers, wherein said rectangular cooling tower has two fill zones of said string-screen-fill packs near to two entrances of cooling air, wherein said square cooling tower may have said string-screen-fill packs to be placed near to two side or four side wall entrance of cooling air, and wherein said string-screen-fill packs are placed near to the entrances of cooling air at the entire outside walls of said pentagon and hexagon evaporative chillers. 
     
     
         3 . A string-screen-fill pack for use in evaporative chillers as recited in  claim 1 , wherein said string-screen-fill packs are employed in counter current evaporative chiller, and wherein said slanted string-screen-fill packs are installed in shape of V-type or X-type fill media.