Exergy analysis of single to triple effect lithium bromide-water vapour absorption cycles and optimization of the operating parameters. (15th January 2019)

• Record Type: Journal Article
• Authors: Azhar, Md.; Siddiqui, M. Altamush
• Is Part Of: Energy conversion and management. Volume 180(2019)
• Page Start: 1225
• Page End: 1246
• Publication Date: 2019-01-15
• Subjects: Exergy analysis -- Direct-fired absorption system -- Indirect-fired absorption system -- Optimum temperatures -- Energy sources; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2018.11.062
• Languages: English
• ISSNs: 0196-8904

Abstract

Highlights: Exergy analysis on direct and indirect fired single to triple effect cycles. Optimization of operating parameters for maximum performance. Comparison of system performance for direct and indirect fired cycles. Optimum operating parameters for direct fired absorption cycles are presented. Abstract: This paper deals with a review on exergy analyses of lithium bromide-water based single to triple effect direct and indirect fired vapour absorption systems. The analysis carried out by various investigators on exergy of the absorption cycles have been discussed. To fill the gap in the knowledge on exergy destruction rate in the absorption system, optimization of the single to triple effect direct and indirect fired absorption cycles have been conducted for a wide range of operating conditions. Hence optimum parameters in various components of the systems for maximum exergy coefficient of performance and minimum exergy destruction rate have been determined. The indirect fired systems have been optimized for different temperatures of the energy source related to the main generator temperature. While the direct fired systems have been optimized considering exergy destruction rate during the combustion process of energy sources. The energy sources selected in the present analysis are compressed natural gas and liquefied petroleum gas. Double effect cycle yields better exergy performance when the difference in temperatures of the energy source and the generator is between 6 to 37 °C, while triple effect cycle performs well when it is beyond 37 °C.