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Attempt of integration of a small commercial ammonia-water absorption refrigerator with a solar concentrator: experience and results.

Author(s) : BUSSO A., FRANCO J., SOGARI N., et al.

Type of article: Article, IJR article

Summary

The integration of a small commercial ammonia-water absorption refrigerator with a solar concentrator as heat source was analyzed theoretically and experimentally. Operation parameters of the fridge were determined by parametric fitting experimental data using a thermodynamic model of the cycle leading to a working pressure of 25 bar, weak and strong solution concentrations of 15 and 30% respectively and a COP of about 0.18. As sold, the fridge can operate with a reduction in the electric power supply of up to 40%. Results showed that the parabolic concentrator (PC) used can deliver temperatures above 200°C for almost 6 h with an average useful power delivery and efficiency of 530 W and 26% respectively. During laboratory test runs it was possible to hold the refrigeration cycle running in a very unstable regime despite the inappropriate heat distribution in the generator unit due to the lower temperature heat source used (220°C). However, outdoor testing with the sun as energy source proved unsuccessful due to the higher heat losses that occur at the pipes connecting the PC with the fridge.

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Pages: 1760-1775

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Details

  • Original title: Attempt of integration of a small commercial ammonia-water absorption refrigerator with a solar concentrator: experience and results.
  • Record ID : 30002247
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 34 - n. 8
  • Publication date: 2011/12

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