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HEAT AND MOISTURE TRANSFER FROM/TO AQUEOUS SOLUTIONS IN MECHANICAL-DRAFT PACKED TOWERS.

Author(s) : KIKUCHI S., FUJITA T., TSUCHIYAMA K.

Summary

THE PAPER DEALS WITH THE CHARACTERISTICS OF HEAT AND MOISTURE TRANSFER IN FORCED-DRAFT PACKED TOWERS, SUCH AS THE WATER COOLING TOWER, THE HEATING TOWER USING AQUEOUS SOLUTIONS OF ETHYLENE GLYCOL, AND THE DEHUMIDIFIER USING AQUEOUS SOLUTIONS OF LITHIUM CHLORIDE. FIRST, CALCULATION METHODS ARE PRESENTED FOR BOTH COUNTERFLOW AND CROSSFLOW TOWERS, WHICH TAKE INTO ACCOUNT HEAT-AND MASS-TRANSFER COEFFICIENTS IN THE GAS PHASE AND PHYSICAL PROPERTIES. LOTS OF EXISTING EXPERIMENTAL DATA SHOW THAT THE APPROXIMATE RELATION PROPOSED BY LEWIS IS APPLICABLE TO THE ABOVE AIR-AQUEOUS SOLUTION SYSTEMS, AS WELL AS TO THE AIR-WATER SYSTEM. THEREFORE, IT WILL BE A PROPER APPROACH FOR THESE TOWERS TO CONSIDER THE OVERALL VOLUMETRIC ENTHALPY-TRANSFER COEFFICIENT. MOREOVER, THE VARIATION OF CONCENTRATION IN AN ANTIFREEZE SOLUTION CIRCULATING THROUGH A HEATING-TOWER SYSTEM IS MEASURED AND COMPARED WITH AN ESTIMATED ONE FROM A VALUE OF THE COEFFICIENT.

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Pages: 1109-1114

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Details

  • Original title: HEAT AND MOISTURE TRANSFER FROM/TO AQUEOUS SOLUTIONS IN MECHANICAL-DRAFT PACKED TOWERS.
  • Record ID : 1992-2191
  • Languages: English
  • Source: New challenges in refrigeration. Proceedings of the XVIIIth International Congress of Refrigeration, August 10-17, 1991, Montreal, Quebec, Canada.
  • Publication date: 1991/08/10
  • Document available for consultation in the library of the IIR headquarters only.

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