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Numerical study of a novel cascading adsorption cycle.

Author(s) : LIU Y., LEONG K. C.

Type of article: Article, IJR article

Summary

A novel cascading adsorption cooling cycle for refrigeration purposes is proposed in this paper. This cycle consists of twozeolite adsorbent beds and a silica gel adsorbent bed. The working refrigerant for the three adsorbers is water. The zeoliteadsorbent bed is configured as the high-temperature stage while the silica gel adsorbent bed acts as the low-temperature stage.Both heat and mass recovery are carried out between the two zeolite adsorbent beds. In addition, heat is also exchanged betweenthe zeolite adsorbent and the silica gel adsorbent beds. A lumped model is assumed for this cascading cycle. The COP for thebase case is found to be 1.35, which is much higher than the COP of an intermittent cycle (about 0.5) and a two-bed combinedheat and mass recovery cycle (about 0.8). However, its specific cooling power of 42.7 W/kg is much lower than that ofthe intermittent cycle. The numerical results indicate that an optimal middle temperature exists for a prescribed driventemperature. The optimal COP increases with an increase in the driven temperature. However, when the driven temperatureincreases beyond 503 K, there is negligible change in the COP.

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Pages: 250-259

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Details

  • Original title: Numerical study of a novel cascading adsorption cycle.
  • Record ID : 2006-1211
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 29 - n. 2
  • Publication date: 2006/03

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