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Supply of cooling and heating with solar assisted absorption heat pumps: an energetic approach.

Author(s) : MENDES L. F., COLLARES-PEREIRA M., ZIEGLER F.

Type of article: Article, IJR article

Summary

The primary energy consumption of two kinds of solar assisted absorption systems (solar assisted absorption chiller during summertime and heat pump durin gwintertime of solar assisted absorption chiller with direct gas combustion for heating during wintertime) is compared with the primary energy consumption of a compression chiller which can work as a heat pump during wintertime. For the absorption systems three technical options were considered: a single effect machine; a double effect machine with the solar energy delivered to the lower temperature desorber and combusion heat of a gas burner delivered to the higher temperature desorber; a double effect machine with both solar energy and combustion heat delivered to the higher temeprature desorber. The analysis performed in the article shows that solar assisted absorption chillers, absorption heat pumps and idrect solar heating systems even with low and intermediate solar fractions can operate with considerably less primary energy consumption than compression systems. Further, the necessary solar collector area to achieve that goal is compatible with roof area available in buildings. It was also verified that, for the double effect absorption machines, there is no advantage in delivering the solar energy to the higher temperature desorber, thus establishing as prefereable the solution in which it is delivered to the lower temperature desorber.

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Pages: 116-125

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Details

  • Original title: Supply of cooling and heating with solar assisted absorption heat pumps: an energetic approach.
  • Record ID : 1998-3162
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 21 - n. 2
  • Publication date: 1998/03

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