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An investigation on the absorbing performance of absorber in a water/lithium-bromide absorption chiller.

Author(s) : XIE G., SHENG G.

Summary

The absorber is one of the most important components for a lithium-bromide absorption chiller (LBAC) as its absorbing characteristics directly influences the performance of whole chiller. It has been indicated that the absorbing efficiency and cooling capacity could be improved by increasing the solution concentration. However, it is not always happened that the COP of the chiller would be improved along with the increasing of the solution concentration because the heating amount needed would also be increased as the generating temperature going up. In this paper, based on the mechanism of falling film absorption on horizontal tubes, the theoretical models of falling film absorption on horizontal tubes have been established. A series of programs used for computing the theoretical mathematical models, including simulation of LBAC cycle and falling film absorption, have been programmed. The models have been validated reasonably by experimental data. The results show that the cooling capacity of the LBAC increases with the solution concentration increasing from 52.5 to 58.5%, and that the value of COP displays as a tendency of parabola that the best value of COP appears at the point of concentration 57%. The investigation proposes the absorbing process of sub-steady thermodynamic equilibrium for the duality solution under increase absorbing pressure.

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Pages: ICR07-B2-981

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Details

  • Original title: An investigation on the absorbing performance of absorber in a water/lithium-bromide absorption chiller.
  • Record ID : 2008-0177
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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