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Comparison of the performance of single-effect, half-effect, double-effect in series and inverse and triple-effect absorption cooling systems operating with the NH3–LiNO3 mixture.

Author(s) : DOMINGUEZ-INZUNZA L. A., HERNÁNDEZ-MAGALLANES J. A., SANDOVAL-REYES M., et al.

Type of article: Article

Summary

This paper presents the performance comparison of five different configurations of absorption cooling systems operating with ammonia–lithium nitrate. The configurations are: i) single-effect, ii) half-effect, iii) double-effect in series, iv) double-effect inverse and v) triple-effect. Mathematical models were developed for each one of the systems. Coefficients of performance are reported for the systems as function of their main operating temperatures, such as: generation, absorption, condensation, and evaporation. The results showed that the lowest evaporator temperatures can be achieved with half-effect systems at the lowest generator temperatures with coefficients of performance around 0.3. The single-effect system is the simplest configuration since it requires fewer components in comparison to the other systems. Its coefficients of performance are almost twice higher than those obtained with half-effect systems but requiring higher generator temperatures. With double-effect systems it is possible to obtain coefficients of performance as high as 1.12 at condenser temperatures of 30°C but they need generator temperatures higher than 140°C to reach evaporator temperatures as low as -5°C. The highest coefficients of performance can be achieved with triple-effect systems but they are the most complex, they require the highest generator temperatures and they should be mainly used for air conditioning.

Details

  • Original title: Comparison of the performance of single-effect, half-effect, double-effect in series and inverse and triple-effect absorption cooling systems operating with the NH3–LiNO3 mixture.
  • Record ID : 30011621
  • Languages: English
  • Source: Applied Thermal Engineering - vol. 66 - n. 1-2
  • Publication date: 2014/05
  • DOI: http://dx.doi.org/10.1016/j.applthermaleng.2014.02.061

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