Please use this identifier to cite or link to this item:
http://hdl.handle.net/10553/75580
Title: | Exergy analysis of single and double effect water-LiBr absorption refrigeration systems | Authors: | Expósito-Méndez, Beatriz Marcos, J. Daniel Blanco Marigorta, Ana María |
UNESCO Clasification: | 3322 Tecnología energética | Keywords: | Absorption Refrigeration Systems Chemical Exergy Exergetic Efficiency Exergy Analysis Water-Libr |
Issue Date: | 2020 | Journal: | Ecos 2020 - Proceedings Of The 33Rd International Conference On Efficiency, Cost, Optimization, Simulation And Environmental Impact Of Energy Systems | Conference: | 33rd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2020 | Abstract: | Exergy analyses are a powerful tool in order to assess and define possible energy efficiency improvements in energy systems. Through this kind of analysis, the origin, cause, and magnitude of the inefficiencies and irreversibilities of an energy system are identified and quantified. This work presents a new perspective on exergy analysis of a single and a double effect absorption refrigeration system. The working fluid is the mixture water-LiBr. The systems have been modeled using commercial software. A new approach has been considered for the definition of the dead state in the exergy analysis. The role of the chemical exergy has also been evaluated, taking into account the mixing and separation processes that the mixture water-LiBr goes through. The main parameters involved in the energetic and exergetic analyses have been evaluated. The exergy analysis has been performed at the component level. The exergy destruction and the exergetic efficiency of each component are reported. This way, the true inefficiencies are located. In the single and double-effect absorption refrigeration cycle, the device with the lowest exergetic efficiency is the absorber with a value of 2.2% and 1.8%, respectively. The absorber is also the device with the highest exergy destruction rate with 74.5% in the single effect, and 83.5% in the double effect. The evaporator is the second device where the greatest irreversibility is produced, followed by the generators, even though the latter present exergetic efficiencies of more than 90%. | URI: | http://hdl.handle.net/10553/75580 | Source: | ECOS 2020 - Proceedings of the 33rd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems[EISSN ], p. 296-307, (Enero 2020) |
Appears in Collections: | Actas de congresos |
Items in accedaCRIS are protected by copyright, with all rights reserved, unless otherwise indicated.