Study on a dual-mode, multi-stage, multi-bed regenerative adsorption chiller

Bidyut B. Saha*, Shigeru Koyama, Kim Choon NG, Yoshinori Hamamoto, Atsushi Akisawa, Takao Kashiwagi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

In this paper, a detailed parametric study on a dual-mode silica gel-water adsorption chiller is performed. This advanced adsorption chiller utilizes effectively low-temperature solar or waste heat sources of temperature between 40 and 95 °C. Two operation modes are possible for the advanced chiller. The first operation mode will be to work as a highly efficient conventional chiller where the driving source temperature is between 60 and 95 °C. The second operation mode will be to work as an advanced three-stage adsorption chiller where the available driving source temperature is very low (between 40 and 60 °C). With this very low driving source temperature in combination with a coolant at 30 °C, no other cycle except an advanced adsorption cycle with staged regeneration will be operational. In this paper, the effect of chilled-water inlet temperature, heat transfer fluid flow rates and adsorption-desorption cycle time effect on cooling capacity and COP of the dual-mode chiller is performed. Simulation results show that both cooling capacity and COP values increase with the increase of chilled water inlet temperature with driving source temperature at 50 and 80 °C in three-stage mode, and single-stage multi-bed mode, respectively. However, the delivered chilled-water temperature increases with chilled-water inlet temperature in both modes.

Original languageEnglish (US)
Pages (from-to)2076-2090
Number of pages15
JournalRenewable Energy
Volume31
Issue number13
DOIs
StatePublished - Oct 1 2006

Keywords

  • Adsorption
  • Dual-mode
  • Multi-bed
  • Parametric study
  • Silica gel-water
  • Solar energy utilization

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Civil and Structural Engineering

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