An Enhancement of the Ice Block Productivity by Inserting a Channel at the Middle of the Mould
Keywords:
Solidification, Ice block production, Batch time reductionAbstract
The purpose of this study is to reduce the batch time the of the block ice production to be not longer than the duration of lower electrical cost in a day, 11 hrs. Computational fluid dynamics (CFD) was used in this study. Three types of mould were considered: conventional mold, conventional mould with a channel in its middle, conventional mould with brine injection in the channel. The pool temperature, initial water temperature, volume of feed water and channel’s brine injection flow rate are -10°C, 27°C, 180 liters and 80 lpm, respectively. Comparison with the batch time of the conventional mold, which is 44.25 hrs., the channel can be reduced the batch time to be 33.92 hrs. Moreover, the injection of brine inside the channel can reduce batch time to be 9.87 hrs. This is due to at the middle of the mould, heat transfer surface is increased from the channel walls and the brine injection causing the channel wall temperature is always below the water freezing point. This leads to the ice forms from both the mould and channel walls.
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