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Feasibility study of a two-stage vapour compression heat pump with ammonia-water solution circuits: experimental results.

Author(s) : RANE M. V., RADERMACHER R.

Type of article: Article, IJR article

Summary

A major improvement in performance was obtained by incorporating a bleed line to attain water balance between the high and the low temperature solution circuits. The new scheme was first investigated by computer simulation and then incorporated in the experimental setup. The advantages of this scheme are reduced first cost (by eliminating the need for a rectifier), a simplified system and its control mechanism, a 20-30% improvement in cooling coefficient of performance and a 10-15% increase in cooling capacity. COPs in the range of 0.69 to 1.04 were obtained experimentally for a temperature lift of 100 K and cooling capacities in the range of 2.02 to 4.22 kilowatts. The pressure ratios encountered were in the range of 6.9 to 11, which are 35 to 50% of the pressure ratio expected for a conventional single-stage heat pump.

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Pages: 258-264

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Details

  • Original title: Feasibility study of a two-stage vapour compression heat pump with ammonia-water solution circuits: experimental results.
  • Record ID : 1993-3583
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 16 - n. 4
  • Publication date: 1993/07

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