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Selection of reasonable concentration of aqua-ammonia solution for solar absorption refrigerator.

Author(s) : QUAN N.

Summary

Solar absorption refrigerators, which were designed and tested in the previous projects, often use aqua-ammonia solution as a working fluids. The COP of these refrigerators depends mainly on generating temperature, ambient temperature and initial concentration of the solution. However, solar collectors, specially flat-plate and fixed types, often have low efficiency, so the temperature of working fluid in absorption cycle is not high enough for generating period. Temperature limit of aqua-ammonia solution in a flat-plate collector with a fixed reflection mirror is below 95°C even in a fine day of high radiation. Based on the system of differential equations expressing the dependence of COP, solution temperature on initial solution concentration, a reasonable range of the solution concentration could be selected. This makes a new design of solar flat-plate collector with a reflector of fixed type and absorption cycle with a generator of shell and tube type more acceptable in commercializing.

Details

  • Original title: Selection of reasonable concentration of aqua-ammonia solution for solar absorption refrigerator.
  • Record ID : 2006-2333
  • Languages: English
  • Source: Cryogenics and refrigeration. Proceedings of ICCR 2003.
  • Publication date: 2003/04/22

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