Title :
Crystal growth of ethanol water solution [for thermal energy storage]
Author :
Ohkubo, Hidetoshi ; Murakami, Toshiki ; Yamazaki, Yuduru ; Chandratilleke, Rohana
Author_Institution :
Tamagawa Univ., Machida, Japan
Abstract :
In this study, the authors investigated the mechanism of mushy crystal formation and the state of a mushy layer formed on a cooling surface, with the objective of utilizing the ethanol water solution as a coolant or a thermal energy storage material. To do this, the effect of surface temperature on crystal growth of ethanol water solution was investigated for various concentrations of the solution. Two types of experiments were carried out in the present work in order to study the mechanisms of crystal formation and growth. In one experiment, the authors studied the mechanism of crystal formation within a minute droplet of ethanol water solution, and in the other, the mechanism of the crystal growth in the mushy layer formed in a liquid pool in contact with a cooling surface. For the observation of crystal formation and growth, they used a high-speed photographic system, a CCD camera and a microscopic photographic apparatus
Keywords :
cooling; crystal growth; surface phenomena; thermal analysis; thermal energy storage; water; CCD camera; coolant; cooling surface; crystal growth; droplet; ethanol water solution; high-speed photographic system; liquid pool; microscopic photographic apparatus; mushy crystal formation; surface temperature; thermal energy storage; Charge coupled devices; Charge-coupled image sensors; Coolants; Cooling; Crystalline materials; Energy storage; Ethanol; Microscopy; Temperature; Water storage;
Conference_Titel :
Energy Conversion Engineering Conference and Exhibit, 2000. (IECEC) 35th Intersociety
Conference_Location :
Las Vegas, NV
Print_ISBN :
1-56347-375-5
DOI :
10.1109/IECEC.2000.870904
