Cold energy release characteristics of an ice/air direct contact heat exchanger
Autor: | Yuji Tsubota, Akiyoshi Ohira, Michio Yanadori, Kunihiko Iwabuchi, Toshikatsu Kimura |
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Rok vydání: | 2001 |
Předmět: | |
Zdroj: | Heat Transfer?Asian Research. 30:95-113 |
ISSN: | 1523-1496 1099-2871 |
Popis: | This paper deals with the cold energy release characteristics of an ice/air direct contact heat exchanger. Characteristics of the outlet temperature, humidity, and time history of heat release are examined when the initial height of the ice-cube-packed bed in the heat exchanger is changed. The following results were obtained in these experiments: (I) Inlet air of 30 °C is lowered to about 0 °C when passed through the heat exchanger, and the absolute humidity of the outlet air is reduced to about a quarter of that of the inlet air. (2) There is an optimum height of the ice-cube-packed bed to maximize the amount of cold energy release. (3) This heat exchange method can supply about twice as much cold energy as is released by an ordinary fin-tube-type heat exchanger even if the air velocity in the heat exchanger is reduced to about 0.38 times that of the fin-tube-type heat exchanger. (4) A nondimensional correlation equation for predicting the time taken for the ice-cube-packed bed to completely melt is derived. |
Databáze: | OpenAIRE |
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