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Using new property data for enthalpy and entropy calculation of ammonia/salt solutions.

Number: pap. n. TP-022

Author(s) : GAROUSI FARSHI L., INFANTE FERREIRA C. A., SEYED MAHMOUDI S. M., et al.

Summary

Absorption refrigeration systems using ammonia/LiNO3 and ammonia/NaSCN as working fluids can be alternatives to ammonia/water systems, since they have higher coefficients of performance and no need to purify the vapor. Many analyses of these cycles reported in the literature use thermophysical properties correlations based on old data, which recently have been shown not to be sufficiently reliable and sometimes not to have adequate working ranges for absorption refrigeration applications. Properties of the working fluids used in absorption refrigeration cycles are important and need to be accurate. Also, it is increasingly accepted that exergy analysis provides more meaningful information when assessing the performance of energy conversion systems. In order to perform exergy analysis of absorption refrigeration cycles the entropy of solutions are needed as well. In this study, enthalpy and entropy data for these solutions are calculated using the most recently published property data. The procedures for these calculations are described in detail and the results are compared with data from the literature.

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Pages: 8 p.

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Details

  • Original title: Using new property data for enthalpy and entropy calculation of ammonia/salt solutions.
  • Record ID : 30008101
  • Languages: English
  • Source: 4th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants
  • Publication date: 2013/06/17

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