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Evaporative cooling behaviour in porous ceramic foam packing.
Number: pap. ID: 216
Author(s) : WANG G., ZHANG X. S., LI X. W.
Summary
The heat and mass transfer process between air and water in an evaporative cooler depends heavily on the packing material. Ceramic foam, which was made up of alumina (Al2O3) and has a pore density of 30PPI (pores per inch), was selected to be the experimental wetted pad. Experiments about the evaporation of water in it were carried out in a psychometric chamber with controllable air temperature and humidity. The cooling efficiency was assessed under the effects of several variables such as dry-and wet-bulb temperature of air, flow ratio of air to water, as well as the water temperature. The obtainable highest cooling efficiency of alumina ceramic foam packing was 0.63. The cooling efficiency varied inversely with the dry-and wet-bulb temperature of air , as well as the mass flow ratio between air and water. Water temperature exerted no signifcant effect on the cooling efficiency.
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Details
- Original title: Evaporative cooling behaviour in porous ceramic foam packing.
- Record ID : 30002248
- Languages: English
- Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
- Publication date: 2011/08/21
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Indexing
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Themes:
Humidification/dehumidification equipment;
Thermodynamics and changes of state;
Heat transfer;
Mass transfer;
Other refrigerating systems (desiccant cooling, thermoelectrics, thermoacoustics…) - Keywords: Porous surface; Ceramics; Mass transfer; Heat transfer; Air; Evaporative system; Foam; Packing; Water
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