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Carbon-ammonia pairs for adsorption refrigeration applications: ice making, air conditioning and heat pumping.

Author(s) : TAMAINOT-TELTO Z., METCALF S. J., CRITOPH R. E., et al.

Type of article: Article, IJR article

Summary

A thermodynamic cycle model is used to select an optimum adsorbent-refrigerant pair in respect of a chosen figure of merit that could be the cooling production (MJ/m3), the heating production (MJ/m3) or the coefficient of performance (COP). This model is based mainly on the adsorption equilibrium equations of the adsorbent-refrigerant pair and heat flows. The simulation results of 26 various activated carbon-ammonia pairs for three cycles (single bed, two-bed and infinite number of beds) are presented at typical conditions for ice making, air conditioning and heat pumping applications. The driving temperature varies from 80 to 200°C. The carbon absorbents investigated are mainly coconut shell and coal based types in multiple forms: monolithic, granular, compacted granular, fibre, compacted fibre, cloth, compacted cloth and powder. Considering a two-bed cycle, the best thermal performances based on power density are obtained with the monolithic carbon KOH-AC, with a driving temperature of 100°C; the cooling production is about 66 MJ/m3 (COP= 0.45) and 151 MJ/m3 (COP= 0.61) for ice making and air conditioning respectively; the heating production is about 236 MJ/m3 (COP= 1.50).

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Pages: pp. 1212-1229

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Details

  • Original title: Carbon-ammonia pairs for adsorption refrigeration applications: ice making, air conditioning and heat pumping.
  • Record ID : 2009-2034
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 6
  • Publication date: 2009/09

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