Experimental investigation of silica gel-water adsorption chillers with and without a passive heat recovery scheme

Xiaolin Wang, Hui Tong Chua*, Kim Choon NG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

We experimentally show that for the same heat exchanger inventory allocation, a four-bed adsorption chiller delivers a 12% higher ultimate cooling capacity than its two-bed counterpart. In addition it delivers a significantly improved quality of instantaneous cooling than a two-bed chiller at the same cooling capacity. The COP-enhancing feature of a passive heat recovery scheme that does not involve additional pumping action or valves is experimentally proven. It improves the COPs of a two-bed chiller and a four-bed chiller by as much as 38 and 25%, respectively, without any effect on their cooling capacities. The highest COPs achieved with a two-bed and four-bed chillers are 0.46±0.02 and 0.45±0.02, respectively. These are measured at a hot-water inlet temperature of 85 °C, cooling-water inlet temperature of 29.4 °C and chilled-water inlet temperature of 12.2 °C.

Original languageEnglish (US)
Pages (from-to)756-765
Number of pages10
JournalInternational Journal of Refrigeration
Volume28
Issue number5
DOIs
StatePublished - Aug 1 2005

Keywords

  • Adsorption systems
  • COP
  • Experiment
  • Heat recovery
  • Improvement
  • Silica gel
  • Water

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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