Experimental study on performance improvement of a four-bed adsorption chiller by using heat and mass recovery

Kim Choon NG*, Xiaolin Wang, Yee Sern Lim, Bidyut Baran Saha, Anutosh Chakarborty, Shigeru Koyama, Atsushi Akisawa, Takao Kashiwagi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

72 Scopus citations

Abstract

The efficacy of a four-bed adsorption chiller has been studied experimentally with respect to a simple but yet effective passive heat and mass recovery schemes. It substantially improves the adsorption chiller COP by as much as 30% over a broad range of cycle time with a wide heat source, coolant and chilled water temperatures. Two schemes have been considered here: Firstly, only the mass recovery is achieved by pressure equalization between the concomitantly cooled adsorber and heated desorber, exploiting the intrinsic vapor-uptake potential by pressure swing that remains in the adsorbent at the end of a half-cycle. Secondly, when both the heat and mass recovery schemes are employed at a rating point of maximum cooling capacity, the chiller COP could increase further to as much as 48%. These improvements are performed without additional hardware changes to the adsorption chiller.

Original languageEnglish (US)
Pages (from-to)3343-3348
Number of pages6
JournalInternational Journal of Heat and Mass Transfer
Volume49
Issue number19-20
DOIs
StatePublished - Sep 1 2006

Keywords

  • Adsorption chiller
  • Adsorption cycle
  • Heat and mass recovery
  • Pressure equalization
  • Valve-timing delay

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy(all)
  • Mechanical Engineering

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