Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/16870
Title: Experiments and Analyses: An Ice Slurry System using Direct Contact Heat Transfer for Cooling Applications
Authors: MUHAMMAD ARIFEEN WAHED
Keywords: Ice slurry, Ice formation phenomena, Direct contact heat transfer, Immiscible liquid, Cooling.
Issue Date: 3-Sep-2009
Source: MUHAMMAD ARIFEEN WAHED (2009-09-03). Experiments and Analyses: An Ice Slurry System using Direct Contact Heat Transfer for Cooling Applications. ScholarBank@NUS Repository.
Abstract: The development of an ice slurry system utilizing direct contact heat transfer between two immiscible liquids, water and coolant, FC-84, requires a deeper understanding of the heat transfer process between the water and liquid in the ice slurry generator. <br>Experiments and analyses were carried out to investigate the physical phenomenon of ice formation around the supercooled liquid droplet and subsequent detachment from the droplet surface. The analysis of this ice formation process was then further extended for different parametric conditions such as droplet diameter, liquid initial temperature and the injection velocity of coolant, which have significant effect on the growth of ice layer. <br>To analyze an ice slurry generator, both simulation and experiments were performed for both initial sensible cooling and subsequent fusion cooling for ice slurry production. Analyses show that the ice generation process in the ice slurry generator can be improved by increasing the number of nozzles, decreasing the nozzle diameter, and lowering the initial coolant temperature in the system. Nozzle position inside the ice slurry generator also plays an important role - nozzle placed at bottom produces more ice slurry than the nozzle placed at top.<br>For cooling applications, heat transfer characteristics of ice slurry in a compact heat exchanger had also been investigated. The ice slurry heat transfer correlation obtained from these investigations was then utilized to evaluate the cooling performance of the heat exchanger. The analyses show that cooling performance of the heat exchanger increases when ice slurry is used instead of chilled water at 7B0C. These analyses would provide better understanding of the ice slurry generator utilizing direct contact heat transfer for cooling applications.<br>
URI: http://scholarbank.nus.edu.sg/handle/10635/16870
Appears in Collections:Ph.D Theses (Open)

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Appendix E.pdf47.78 kBAdobe PDF

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