Adsorption cooling cycles for adsorbent/adsorbate pairs at assorted operating pressures

Wai Soong Loh, Kim Choon Ng, Anutosh Chakraborty, Bidyut Baran Saha, Ibrahim I. El-Sharkawy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents the performance analysis of an ideal heat driven adsorption cooling cycle in both low and high operating pressures. A total of eight specimens of adsorbents and refrigerant pairs namely activated carbon fibre (ACF) of type A15/ethanol, A20/ethanol, Silica gel/water, Chemviron/R134a, Fluka/R134a, A20/R134a, Maxsorb II/R134a and Maxsorb III/R134a have been investigated. The relationships between equilibrium pressures, adsorbent temperatures and equilibrium adsorption concentrations (Dühring or P-T-W diagram) have been presented. The understanding of Dühring diagram (as shown below) is crucial in the design of commercial adsorption chillers. Parametric analysis has been carried out with various regeneration (desorption) and evaporating temperatures. Theoretical analysis shows that the ACF (A20)/ethanol can achieve 344 kJ/kgadsorbent specific cooling effect (SCE) with regeneration temperature at 85°C. Moreover, the ACF (A20)/ethanol exhibits a coefficient of performance (COP) of 0.7 and followed by the silica gel/water pair with COP of 0.68 at low regeneration temperature (below 85°C).

Original languageEnglish
Title of host publication4th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2009
PublisherNational Taipei University of Technology
Pages287-292
Number of pages6
ISBN (Print)9868509610, 9789868509610
Publication statusPublished - 2009
Externally publishedYes
Event4th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2009 - Taipei, Taiwan, Province of China
Duration: May 20 2009May 22 2009

Publication series

Name4th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2009

Other

Other4th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2009
CountryTaiwan, Province of China
CityTaipei
Period5/20/095/22/09

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)

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