%0 Journal Article
%T ¨¦tude des performances thermiques d¡¯un r¨¦frig¨¦rateur local bas¨¦ sur l¡¯¨¦vaporation de l¡¯eau ¨¤ travers une paroi poreuse en argile cuite
%A AO Dissa
%A DJ Bathiebo
%A A Leon
%A J Koulidiati
%J Afrique Science: Revue Internationale des Sciences et Technologie
%D 2010
%I 
%X Dans cette ¨¦tude, un dispositif de r¨¦frig¨¦ration bas¨¦e sur l¡¯¨¦vaporation de l¡¯eau ¨¤ travers une paroi poreuse en poterie est con u, simul¨¦ et exp¨¦riment¨¦. L¡¯architecture originale de ce r¨¦frig¨¦rateur local a ¨¦t¨¦ con ue ¨¤ partir de l¡¯id¨¦e d¡¯optimiser les param¨¨tres pouvant influencer son fonctionnement tout en minimisant le volume d¡¯eau ¨¤ ¨¦vaporer ¨¤ travers la paroi poreuse. Les r¨¦sultats montrent que le fonctionnement du r¨¦frig¨¦rateur est fortement influenc¨¦ par les trois param¨¨tres physiques dont d¨¦pend essentiellement l¡¯¨¦vaporation de l¡¯eau ¨¤ travers un milieu poreux (la temp¨¦rature et l¡¯hygrom¨¦trie de l¡¯air et la surface totale d¡¯¨¦change). L¡¯analyse des courbes exp¨¦rimentales et th¨¦oriques (simulation) montre que la temp¨¦rature de l¡¯eau du r¨¦frig¨¦rateur ne peut ¨ºtre abaiss¨¦e au-del¨¤ de la temp¨¦rature de bulbe humide de l¡¯air ¨¦vaporateur. Un tel r¨¦frig¨¦rateur en argile cuite aurait de possibles applications dans les cuisines et les Jardins pour la conservation des denr¨¦es, en campagne pour le rafra chissement, sur les airs d¡¯autoroute, dans les parcs nationaux et sur les campings des r¨¦gions m¨¦diterran¨¦ennes. Mots-cl¨¦s : paroi poreuse, saturation, eau, r¨¦frig¨¦rateur, ¨¦vaporation, temp¨¦rature de bulbe humide, argile cuite. Study of thermal performances of a local refrigerator based on water evaporation through an earthenware porous wall. In this study, a system of refrigeration based on water evaporation through a porous wall in earthenware is designed, simulated and tested. The original architecture of this local refrigerator was conceived from the idea to optimize the parameters being able to influence its operation while minimizing the volume of water to be evaporated through the porous wall. The results show that the operation of the refrigerator is strongly influenced by the three physical parameters on which water evaporation through a porous medium mainly depends on (temperature, relative humidity of the air and total surface of exchange). The analysis of the experimental and theoretical curves (simulation) shows that the temperature of the refrigerator water cannot be lowered beyond the wet bulb temperature of the evaporating air. Such an earthenware refrigerator would have possible applications in the kitchens and the Gardens for the conservation of the food products, in the countryside for cooling, on the motorways air, in the national parks and on the camping areas of Mediterranean regions.
%U http://www.ajol.info/index.php/afsci/article/view/73863