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Waste heat driven dual-mode, multi-stage, multi-bed regenerative adsorption system.

Author(s) : SAHA B. B., KOYAMA S., KASHIWAGI T., et al.

Type of article: Article, IJR article

Summary

Over the past few decades there have been considerable efforts to use adsorption (solid/vapour) for cooling and heat-pump applications, but intensified efforts were initiated only with the advent of international restrictions on the production and utilization of CFCs and HCFCs. In this article, a dual-mode silica gel-water adsorption chiller design is outlined along with the performance evaluation of the innovative chiller. This 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 with the exception of an advanced adsorption cycle with staged regeneration will be operational. The drawback of this operational mode is its poor efficiency in terms of cooling capacity and COP. Simulation results show that optimum COP values are obtained at driving source temperatures between 50 and 55 °C in three-stage mode, and between 80 and 85 °C in single-stage, multi-bed mode.

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Pages: 749-757

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Details

  • Original title: Waste heat driven dual-mode, multi-stage, multi-bed regenerative adsorption system.
  • Record ID : 2004-1724
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 26 - n. 7
  • Publication date: 2003/11

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