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ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

HEAT CONDUCTION IN ZEOLITE BEDS

Get access (open in a dialog) DOI: 10.1615/IHTC7.770
pages 105-107

要約

The thermal conductivity of a bed of Na-Y-zeolite extrudates in equilibrium with water vapor of pressures between < 5 N/m2 and about 90000 N/m2 is measured in the temperature range between 64°C and 216°C. Under these conditions the amount of water absorbed in the zeolite varies between < 1 and more than 30 wt%. The thermal conductivity is in the order of 0.15 W/(K m) and increases with both concentration of absorbed water and temperature. In addition the heat-transfer coefficient at the interface between the zeolite bed and the walls of the measuring cell is determined. It amounts to 25 W/(K m2) for a water-vapor pressure < 5 N/m2 and increases to values in the order of 500 W/(K m2) for pressures > 1400 N/m2. Due to absorption and desorption of water in the zeolite the thermal diffusivity can be smaller by a factor of nine compared to dried beds.